JXON - Archive of obsolete content
|*| http://www.gnu.org/licenses/gpl-3.0-standalone.html |*| \*/ function parsetext (svalue) { if (/^\s*$/.test(svalue)) { return null; } if (/^(?:true|false)$/i.test(svalue)) { return svalue.tolowercase() === "true"; } if (isfinite(svalue)) { return parsefloat(svalue); } if (isfinite(date.parse(svalue))) { return new date(svalue); } return svalue; } function jxontree (oxmlparent) { var nattrlen = 0, nlength = 0, scollectedtxt = ""; if (oxmlparent.haschildnodes()) { for (var onode, sprop, vcontent, nitem = 0; nitem < oxmlparent.ch...
...|*| http://www.gnu.org/licenses/gpl-3.0-standalone.html |*| \*/ function parsetext (svalue) { if (/^\s*$/.test(svalue)) { return null; } if (/^(?:true|false)$/i.test(svalue)) { return svalue.tolowercase() === "true"; } if (isfinite(svalue)) { return parsefloat(svalue); } if (isfinite(date.parse(svalue))) { return new date(svalue); } return svalue; } function jxontree (oxmlparent) { if (oxmlparent.haschildnodes()) { var scollectedtxt = ""; for (var onode, sprop, vcontent, nitem = 0; nitem < oxmlparent.childnodes.length; nitem++)...
...which do not contain other element nodes, text nodes, cdatasection nodes or attr nodes) have the default value true (see the code considerations).
...And 22 more matches

Linear-gradient Generator - CSS: Cascading Style Sheets
linear-gradient generator html content <div id="container"> <div id="gradient-container" data-alpha="true"> </div> <div id="controls"> <div class="section"> <div class="title"> active point </div> <div class="property"> <div class="ui-input-slider" data-topic="point-position" data-info="position" data-unit="px" data-min="-1000" data-value="0" data-max="1000" data-sensivity="5"></div> <div id="delete-point" class="button"> delete point </div> </div> <div class="ui-color-picker" data-topic="picker"></div> </div> <div class="section"> <div class="title"> active axis </div> ...
...ding: 0 0.3em; border: 1px solid #3490d2; border-color: #208b20; background: #666; background-color: #eef1f5; color: #000; position: absolute; top: 100%; left: 0; z-index: 100; overflow: hidden; transition: all 0.3s; -moz-box-sizing: border-box; -webkit-box-sizing: border-box; box-sizing: border-box; } .ui-dropdown-list:hover { overflow: auto; } .ui-dropdown-list[data-hidden='true'] { height: 0 !important; opacity: 0; visibility: hidden; } .ui-dropdown[data-position='left'] .ui-dropdown-list { left: -100%; top: 0; } .ui-dropdown[data-position='right'] .ui-dropdown-list { left: 100%; top: 0; } .ui-dropdown-list > div { width: 80%; height: 1.6em; margin: 0.3em 0; padding: 0.3em 10%; line-height: 1.6em; } .ui-dropdown-list > div:hover { background: #3490d2; ...
...color:#fff; border-radius: 2px; cursor: pointer; } /* * color picker tool */ body { width: 100%; height: 100%; margin: 0 auto; font-family: "segoe ui", arial, helvetica, sans-serif; -moz-user-select: none; -webkit-user-select: none; -ms-user-select: none; user-select: none; } body[data-dragging="true"] { } /** * resize handle */ .resize-handle { width: 10px; height: 10px; background: url("images/resize.png") center center no-repeat; position: absolute; bottom: 0; right: 0; } [data-resize='both']:hover { cursor: nw-resize !important; } [data-resize='width']:hover { cursor: w-resize !important; } [data-resize='height']:hover { cursor: n-resize !important; } /** * main container */ #container { width: 1000px; height: 100%; display: table; margin: 0 auto; }...
...And 21 more matches

Enc Dec MAC Using Key Wrap CertReq PKCS10 CSR
r *dbdir, certname *subject, const char *subjectstr, const char *certreqfilename) { prbool validationfailed = pr_false; if (!subject) { pr_fprintf(pr_stderr, "%s -g -d %s -s: improperly formatted name: \"%s\"\n", progname, dbdir, subjectstr); validationfailed = pr_true; } if (!certreqfilename) { pr_fprintf(pr_stderr, "%s -g -d %s -s %s -r: certificate request file name not found\n", progname, dbdir, subjectstr); validationfailed = pr_true; } if (validationfailed) { fprintf(stderr, "\nusage: %s %s \n\n", progname, "-g -d <dbdirpath> -s <subject> -r <csr> \n"); exit(-1);...
...st char *certreqfilename, const char *issuernamestr, const char *serialnumberstr, prbool selfsign) { prbool validationfailed = pr_false; if (!nicknamestr) { pr_fprintf(pr_stderr, "%s -a -d %s -n : nick name is missing\n", progname, dbdir); validationfailed = pr_true; } if (!truststr) { pr_fprintf(pr_stderr, "%s -a -d %s -n %s -t: trust flag is missing\n", progname, dbdir, nicknamestr); validationfailed = pr_true; } if (!certfilename) { pr_fprintf(pr_stderr, "%s -a -d %s -n %s -t %s -c: certificate file name not found\n", progname, dbdir, nicknamestr, truststr, serialnumber...
...str, certreqfilename); validationfailed = pr_true; } if (pr_access(certfilename, pr_access_exists) == pr_failure) { if (!certreqfilename) { pr_fprintf(pr_stderr, "%s -a -d %s -n %s -t %s -c %s -r: certificate file or certificate request file is not found\n", progname, dbdir, nicknamestr, truststr, certfilename); validationfailed = pr_true; } if (!selfsign && !issuernamestr) { pr_fprintf(pr_stderr, "%s -a -d %s -n %s -t %s -c %s -r %s -u : issuer name is missing\n", progname, dbdir, nicknamestr, truststr, certfilename, certreqfilename); validationfailed = pr_true; } if (!serialnumberstr) { pr_fprintf(pr_stderr, "%s -a -d...
...And 20 more matches

sslfnc.html
an application that wishes to do sumultaneous reads and writes should set this to pr_true.
...if set to pr_true, it will; otherwise, it will not.
... factory setting is on (pr_true).
...And 20 more matches

Box-shadow generator - CSS: Cascading Style Sheets
</div> </div> <div id="element_properties" class="category"> <div class="title"> class element properties </div> <div class="group"> <div class="group property"> <div class="ui-slider-name"> border </div> <div class="ui-checkbox" data-topic='border-state' data-state="true"></div> </div> <div id="z-index" class="slidergroup"> <div class="ui-slider-name"> z-index </div> <div class="ui-slider-btn-set" data-topic="z-index" data-type="sub"></div> <div class="ui-slider" data-topic="z-index" data-min="-10" data-max="10" data-step="1"...
...ition: absolute; top: 2px; } #output .button { width: 90px; height: 22px; margin: 0 5px 0 0; text-align: center; line-height: 20px; font-size: 14px; color: #fff; background-color: #999; border-top-left-radius: 3px; border-top-right-radius: 3px; bottom: -5px; float:left; } #output .button:hover { color: #fff; background-color: #666; cursor: pointer; } #output .menu [data-active="true"] { color: #777; background-color: #fff; border: 1px solid #ccc; border-bottom: none; } #output .menu [data-topic="before"] { left: 100px; } #output .menu [data-topic="after"] { left: 200px; } #output .output { width: 480px; margin: 10px; padding: 10px; overflow: hidden; color: #555; font-size: 14px; border: 1px dashed #ccc; border-radius: 3px; display: none; -moz-box-sizing: ...
...value : (min + max) / 2 | 0; this.snap = snap === "true" ?
...And 20 more matches

Making decisions in your code — conditionals - Learn web development
else syntax basic if...else syntax looks like the following in pseudocode: if (condition) { code to run if condition is true } else { run some other code instead } here we've got: the keyword if followed by some parentheses.
...the condition makes use of the comparison operators we discussed in the last module and returns true or false.
... a set of curly braces, inside which we have some code — this can be any code we like, and it only runs if the condition returns true.
...And 19 more matches

Shell global objects
srunonce use the isrunonce compiler option (default: false) noscriptrval use the no-script-rval compiler option (default: false) filename filename for error messages and debug info linenumber starting line number for error messages and debug info columnnumber starting column number for error messages and debug info global global in which to execute the code newcontext if true, create and use a new cx (default: false) catchtermination if true, catch termination (failure without an exception value, as for slow scripts or out-of-memory) and return 'terminated' element if present with value v, convert v to an object o and mark the source as being attached to the dom element o.
... sourceislazy if present and true, indicates that, after compilation, script source should not be cached by the js engine and should be lazily loaded from the embedding as-needed.
... loadbytecode if true, and if the source is a cacheentryobject, the bytecode would be loaded and decoded from the cache entry instead of being parsed, then it would be executed as usual.
...And 19 more matches

Client-side form validation - Learn web development
when an element is valid, the following things are true: the element matches the :valid css pseudo-class, which lets you apply a specific style to valid elements.
... when an element is invalid, the following things are true: the element matches the :invalid css pseudo-class, and sometimes other ui pseudo-classes (e.g., :out-of-range) depending on the error, which lets you apply a specific style to invalid elements.
...you can find full details of all the available properties in the validitystate reference page; below is listed a few of the more common ones: patternmismatch: returns true if the value does not match the specified pattern, and false if it does match.
...And 18 more matches

sample2
1); } /* * validate the options used for generate csr command */ static void validategeneratecsrcommand(const char *progname, const char *dbdir, certname *subject, const char *subjectstr, const char *certreqfilename) { prbool validationfailed = pr_false; if (!subject) { pr_fprintf(pr_stderr, "%s -g -d %s -s: improperly formatted name: \"%s\"\n", progname, dbdir, subjectstr); validationfailed = pr_true; } if (!certreqfilename) { pr_fprintf(pr_stderr, "%s -g -d %s -s %s -r: certificate request file name not found\n", progname, dbdir, subjectstr); validationfailed = pr_true; } if (validationfailed) { fprintf(stderr, "\nusage: %s %s \n\n", progname, "-g -d <dbdirpath> -s <subject> -r <csr> \n"); exit(-1); } } /* * validate the options used for add cert to db command */ static void validateaddcertt...
...odbcommand(const char *progname, const char *dbdir, const char *nicknamestr, const char *truststr, const char *certfilename, const char *certreqfilename, const char *issuernamestr, const char *serialnumberstr, prbool selfsign) { prbool validationfailed = pr_false; if (!nicknamestr) { pr_fprintf(pr_stderr, "%s -a -d %s -n : nick name is missing\n", progname, dbdir); validationfailed = pr_true; } if (!truststr) { pr_fprintf(pr_stderr, "%s -a -d %s -n %s -t: trust flag is missing\n", progname, dbdir, nicknamestr); validationfailed = pr_true; } if (!certfilename) { pr_fprintf(pr_stderr, "%s -a -d %s -n %s -t %s -c: certificate file name not found\n", progname, dbdir, nicknamestr, truststr, serialnumberstr, certreqfilename); validationfailed = pr_true; } if (pr_access(certfilename, pr_access_exists...
...) == pr_failure) { if (!certreqfilename) { pr_fprintf(pr_stderr, "%s -a -d %s -n %s -t %s -c %s -r: certificate file or certificate request file is not found\n", progname, dbdir, nicknamestr, truststr, certfilename); validationfailed = pr_true; } if (!selfsign && !issuernamestr) { pr_fprintf(pr_stderr, "%s -a -d %s -n %s -t %s -c %s -r %s -u : issuer name is missing\n", progname, dbdir, nicknamestr, truststr, certfilename, certreqfilename); validationfailed = pr_true; } if (!serialnumberstr) { pr_fprintf(pr_stderr, "%s -a -d %s -n %s -t %s -c %s -r %s -u %s -m : serial number is missing\n", progname, dbdir, nicknamestr, truststr, certfilename, certreqfilename, issuernamestr); validationfailed = pr_true; } } if (validationfailed) { fprintf(stderr, "\nusage: %s %s \n\n", progname, " -a -d <dbdir...
...And 18 more matches

ValidityState - Web APIs
properties for each of these boolean properties, a value of true indicates that the specified reason validation may have failed is true, with the exception of the valid property, which is true if the element's value obeys all constraints.
... badinput read only a boolean that is true if the user has provided input that the browser is unable to convert.
... patternmismatch read only a boolean that is true if the value does not match the specified pattern, and false if it does match.
...And 18 more matches

JavaScript Daemons Management - Archive of obsolete content
wner = daemon.context; daemon.prototype.task = null; daemon.prototype.rate = 100; daemon.prototype.length = infinity; daemon.prototype.reversals = 0; daemon.prototype.onstart = null; daemon.prototype.onstop = null; /* these properties should be read-only after the creation of the daemon */ daemon.prototype.session = -1; daemon.prototype.index = 0; daemon.prototype.paused = true; daemon.prototype.backw = true; /* system required daemon global object methods */ daemon.forcecall = function (odmn) { odmn.index += odmn.backw ?
... -1 : 1; var bbreak = odmn.task.call(odmn.owner, odmn.index, odmn.length, odmn.backw) === false, bend = odmn.isatend(), binvert = odmn.reversals > 0; if (bend && !binvert || bbreak) { odmn.pause(); return false; } if (bend && binvert) { odmn.backw = !odmn.backw; odmn.reversals--; } return true; }; /* system not required daemon global object methods */ /** * daemon global object optional methods (shortcuts).
...isfinite(this.length) && this.index < 1 : this.index + 1 > this.length; }; daemon.prototype.synchronize = function () { if (this.paused) { return; } clearinterval(this.session); this.session = setinterval(daemon.forcecall, this.rate, this); }; daemon.prototype.pause = function () { clearinterval(this.session); this.paused = true; }; /* system not required daemon instances methods */ /** * basic user interface.
...And 17 more matches

CustomizableUI.jsm
when a customizable toolbar's xbl binding is constructed (generally, that is when a <toolbar customizable="true"/> node is appended to the document and isn't invisible), the binding will call into customizableui and register the toolbar's node as being one of the concrete instances of its area.
...in order to register such a toolbar, set the 'overflowable' property to true, and provide the id of the anchor in the 'anchor' property.
...anode is the dom node changed, anextnode the dom node (if any) before which a widget will be inserted, acontainer the actual dom container (could be an overflow panel in case of an overflowable toolbar), and awasremoval is true iff the action about to happen is the removal of the dom node.
...And 17 more matches

OS.File for the main thread
y exists: let encoder = new textencoder(); // this encoder can be reused for several writes let array = encoder.encode("this is some text"); // convert the text to an array let promise = os.file.writeatomic("file.txt", array, // write the array atomically to "file.txt", using as temporary {tmppath: "file.txt.tmp", nooverwrite: true}); // buffer "file.txt.tmp".
... example: rename a file you have to use os.file.move to rename a file: let promise = os.file.move("oldname.txt", "newname.txt", {nooverwrite:true}); here's a working example which renames test.txt to testrenamed.txt if the file is located in directory c:\jean\ var promise = os.file.move(os.path.join('c:', 'jean', 'test.txt'), os.path.join('c:', 'jean', 'testrenamed.txt')); promise.then( function() { console.log('rename successful') }, function(arejectreason) { console.log('rename failed, arejectreason = ', arejectreason) } ) the nooverwrite true is important, as default is false which means if a file in the directory exists already with the same name it will no longer be there after this "renam...
... return promise.resolve(true); // loop end.
...And 17 more matches

textbox (Toolkit autocomplete) - Archive of obsolete content
completedefaultindex new in thunderbird 3 requires seamonkey 2.0 type: boolean if true, the best match value will be filled into the textbox as the user types.
... completeselectedindex type: boolean if true, the text in the text field will be autocompleted as the user selects from the popup list.
... disableautocomplete new in thunderbird 3requires seamonkey 2.0 type: boolean if true, the autocomplete behavior will be disabled.
...And 16 more matches

Theme changes in Firefox 2 - Archive of obsolete content
browser.css the following styles used in firefox 1.5 themes are no longer used in firefox 2 and should be removed from your theme: #bookmarks-button:active #copy-button:active #cut-button:active #downloads-button:active #forward-button[buttondown="true"] #history-button:active #home-button:active #mail-button #mail-button:active #mail-button[disabled="true"] #mail-button[open="true"] #new-tab-button:active #new-tab-button[checked="true"] #new-window-button:active #new-window-button[checked="true"] #paste-button:active #print-button:active #reload-button:active #stop-button:active .messagebutton .messageimage .messagetext brows...
...kmarks-button:active toolbar[iconsize="small"] #copy-button:active toolbar[iconsize="small"] #cut-button:active toolbar[iconsize="small"] #downloads-button:active toolbar[iconsize="small"] #history-button:active toolbar[iconsize="small"] #home-button:active toolbar[iconsize="small"] #mail-button toolbar[iconsize="small"] #mail-button:active toolbar[iconsize="small"] #mail-button[disabled="true"] toolbar[iconsize="small"] #mail-button[open="true"] toolbar[iconsize="small"] #new-tab-button:active toolbar[iconsize="small"] #new-window-button:active toolbar[iconsize="small"] #paste-button:active toolbar[iconsize="small"] #print-button:active toolbar[iconsize="small"] #reload-button:active toolbar[iconsize="small"] #stop-button:active toolbar[mode="icons"] .toolbarbutton-text toolb...
...n > .toolbarbutton-text toolbar[mode="text"] .toolbarbutton-icon the following styles need to be added to your theme to be compatible with firefox 2: #back-button .toolbarbutton-menubutton-dropmarker #back-button:hover #back-button:hover .toolbarbutton-menubutton-dropmarker #back-button:hover:active #back-button:hover:active .toolbarbutton-menubutton-dropmarker #back-button[buttondown="true"] > .toolbarbutton-menubutton-dropmarker #back-button[buttonover="true"] #back-button[buttonover="true"] > .toolbarbutton-menubutton-dropmarker #back-button[disabled="true"] .toolbarbutton-menubutton-dropmarker #back-button[open="true"] #bookmarks-button:hover #bookmarks-button:hover:active #bookmarks-button[checked="true"] #copy-button:hover #copy-button:hover:active #cut-button:hover ...
...And 16 more matches

nsIHTMLEditor
n astring aattribute, in astring avalue); void setdocumenttitle(in astring atitle); void setinlineproperty(in nsiatom aproperty, in astring aattribute, in astring avalue); void setparagraphformat(in astring aparagraphformat); void updatebaseurl(); attributes attribute type description iscssenabled boolean a boolean which is true is the htmleditor has been instantiated with css knowledge and if the css pref is currently checked.
...if aiscreatedhidden is true, the class "hidden" is added to the created element.
... void getalignment( out boolean amixed, out short aalign ); parameters amixed true if there is more than one type of list item, or if there is some list and non-list.
...And 16 more matches

MediaTrackSupportedConstraints - Web APIs
autogaincontrol a boolean whose value is true if the autogaincontrol constraint is supported in the current environment.
... width a boolean value whose value is true if the width constraint is supported in the current environment.
... height a boolean value whose value is true if the height constraint is supported in the current environment.
...And 16 more matches

source-editor.jsm
n(number astart, number aend); breakpoint management void addbreakpoint(number alineindex, [optional] string acondition); array getbreakpoints(); boolean removebreakpoint(number alineindex); properties attribute type description dirty boolean set this value to false whenever you save the text; the editor will update it to true when the content is changed.
... ignorecase boolean true if the search was case sensitive; otherwise false.
... readonly boolean set this value to true to make the editor read only, thereby preventing the user from making changes.
...And 15 more matches

Image file type and format guide - Web media technologies
true color 8 and 16 each pixel is represented by three d-bit values indicating the level of the red, green, and blue color components.
... true color with alpha 8 and 16 each pixel is comprised of four d-pixel color components: red, green, blue, and the alpha sample indicating how opaque the pixel is.
... true color 8 and 16 each pixel is represented by three values representing the red, green, and blue color components; each is d bits.
...And 15 more matches

Bytecode Descriptions
false, true stack: ⇒ true/false push a boolean constant.
...push true if obj has a property with the key id.
...there's a shell-only option, newglobal({clonesingletons: true}), that makes this instruction do a deep copy of the object.
...And 14 more matches

Places utilities for JavaScript
the all take in the same argument and return a boolean true or false, so i'm just going to list them all in one lump: boolean nodeisfolder(anode) determines whether or not a resultnode is a bookmark folder or not.
... return type return true if the node is a folder, false otherwise.
... parameters folderid the folder to open [optional] excludeitems true to hide all items (individual bookmarks).
...And 13 more matches

WebIDL bindings
nullable strings are represented by the same types as non-nullable ones, but the string will return true for domstringisnull().
... nullable utf8strings are represented by the same types as non-nullable ones, but the string will return true for isvoid().
... nullable bytestring are represented by the same types as non-nullable ones, but the string will return true for isvoid().
...And 13 more matches

@font-feature-values - CSS: Cascading Style Sheets
noedge no support nofirefox full support 34 full support 34 full support 24disabled disabled from version 24: this feature is behind the layout.css.font-features.enabled preference (needs to be set to true).
... nochrome android no support nofirefox android full support 34 full support 34 full support 24disabled disabled from version 24: this feature is behind the layout.css.font-features.enabled preference (needs to be set to true).
... noedge no support nofirefox full support 34 full support 34 full support 24disabled disabled from version 24: this feature is behind the layout.css.font-features.enabled preference (needs to be set to true).
...And 13 more matches

textbox - Archive of obsolete content
do not set the attribute to true, as this will suggest you can set it to false to enable the element again, which is not the case.
... focused type: boolean this attribute is true if the element is focused.
... hidespinbuttons type: boolean if true, the number box does not have arrow buttons next to it to allow the user to adjust the value.
...And 12 more matches

nsITreeView
return value true if a drop is allowed at the current location; otherwise false.
... before true to test drop before.
... return value true if a drop event can occur.
...And 12 more matches

Debugger.Object - Firefox Developer Tools
callable true if the referent is a callable object (such as a function or a function proxy); false otherwise.
... isboundfunction if the referent is a debuggee function, returns true if the referent is a bound function; false otherwise.
... isarrowfunction if the referent is a debuggee function, returns true if the referent is an arrow function; false otherwise.
...And 12 more matches

BasicCardResponse - Web APIs
rtedtypes: ['credit', 'debit'] } }]; var details = { total: {label: 'donation', amount: {currency: 'usd', value: '65.00'}}, displayitems: [ { label: 'original donation amount', amount: {currency: 'usd', value: '65.00'} } ], shippingoptions: [ { id: 'standard', label: 'standard shipping', amount: {currency: 'usd', value: '0.00'}, selected: true } ] }; var options = {requestshipping: true}; try { var request = new paymentrequest(supportedinstruments, details, options); // add event listeners here.
...ort noedge no support ≤18 — 79firefox full support 56notes disabled full support 56notes disabled notes available only in nightly builds.disabled from version 56: this feature is behind the dom.payments.request.enabled preference (needs to be set to true) and the dom.payments.request.supportedregions preference (needs to be set to a comma-delineated list of one or more 2-character iso country codes indicating the countries in which to support payments (for example, us,ca.).
... nochrome android full support 57firefox android full support 56notes disabled full support 56notes disabled notes available only in nightly builds.disabled from version 56: this feature is behind the dom.payments.request.enabled preference (needs to be set to true) and the dom.payments.request.supportedregions preference (needs to be set to a comma-delineated list of one or more 2-character iso country codes indicating the countries in which to support payments (for example, us,ca.).
...And 12 more matches

Border-image generator - CSS: Cascading Style Sheets
dding: 0 0.3em; border: 3px solid #3490d2; border-color: #208b20; background: #666; background-color: #eef1f5; color: #000; position: absolute; top: 2em; left: 0; z-index: 100; overflow: hidden; transition: all 0.3s; -moz-box-sizing: border-box; -webkit-box-sizing: border-box; box-sizing: border-box; } .ui-dropdown-list:hover { overflow: auto; } .ui-dropdown-list[data-hidden='true'] { height: 0 !important; opacity: 0; visibility: hidden; } .ui-dropdown[data-position='left'] .ui-dropdown-list { left: -100%; top: 0; } .ui-dropdown[data-position='right'] .ui-dropdown-list { left: 100%; top: 0; } .ui-dropdown-list > div { width: 100%; height: 1.6em; margin: 0.3em 0; padding: 0.3em; line-height: 1em; -moz-box-sizing: border-box; -webkit-box-sizing: border-box;...
...kit-box-sizing: border-box; box-sizing: border-box; -moz-user-select: none; -webkit-user-select: none; -ms-user-select: none; user-select: none; } body[data-move='x'] { cursor: w-resize !important; } body[data-move='y'] { cursor: s-resize !important; } #container { width: 100%; -moz-box-sizing: border-box; -webkit-box-sizing: border-box; box-sizing: border-box; } [data-draggable='true']:hover { cursor: move; } [data-draggable='true']:hover > * { cursor: default; } /******************************************************************************/ /******************************************************************************/ /* * border image picker */ #gallery { box-shadow: 0 0 3px 0 #bababa; } #image-gallery { width: 600px; height: 100px; margin: 0 auto; transi...
...tion: margin 0.4s; } #image-gallery .image { height: 80px; float: left; margin: 10px; opacity: 0.5; background-color: #fff; box-shadow: 0px 0px 3px 1px #bababa; } #image-gallery .image[selected="true"] { box-shadow: 0px 0px 3px 1px #3bba52; opacity: 1; } #image-gallery .image:hover { cursor: pointer; box-shadow: 0px 0px 3px 1px #30ace5; opacity: 1; } #image-gallery[data-collapsed='true'] { margin-top: -100px; } /* load menu */ #load-actions { margin: 10px 0; } #toggle-gallery { width: 30px; height: 25px; margin: 10px; color: #fff; background-image: url('https://mdn.mozillademos.org/files/6005/arrow-up-white.png'); background-repeat: no-repeat; background-position: top 4px center; background-color: #888888 !important; border-radius: 2px; float: left; } #toggle-g...
...And 12 more matches

Chapter 3: Introduction to XUL—How to build a more intuitive UI - Archive of obsolete content
setting hidden="true" disables display of that element.
... setting collapsed="true" sets an element's height and width to 0, but the element is treated as being present.
...typically, elements with the disabled="true" attribute will appear as either transparent or pale gray.
...And 11 more matches

Setting up an extension development environment - Archive of obsolete content
maxversion needs to be set in install.rdf javascript.options.showinconsole = true.
... nglayout.debug.disable_xul_cache = true.
... browser.dom.window.dump.enabled = true.
...And 11 more matches

Tree View Details - Archive of obsolete content
in addition to the getlevel method, there is a hasnextsibling function which, given a row, should return true if there is another row afterwards at the same level.
... the iscontainer method should return true if a row is a container and might contain children.
... the iscontainerempty method should return true if a row is an empty container, for instance, a directory with no files in it.
...And 11 more matches

Advanced Svelte: Reactivity, lifecycle, accessibility - Learn web development
put the following content into your moreactions.svelte file: <script> import { createeventdispatcher } from 'svelte' const dispatch = createeventdispatcher() let completed = true const checkall = () => { dispatch('checkall', completed) completed = !completed } const removecompleted = () => dispatch('removecompleted') </script> <div class="btn-group"> <button type="button" class="btn btn__primary" on:click={checkall}>{completed ?
... you'll notice that the array is successfully updated every time you press the button (the todo objects' completed properties are toggled between true and false), but svelte is not aware of that.
...and that makes sense, because otherwise svelte would be aware of the inner workings of the foreach() method; the same would therefore be true for any method attached to any object or array.
...And 11 more matches

nsIPromptService
return value true for ok, false for cancel see also the confirm_example.
... return value true for ok, false for cancel confirmex() puts up a dialog with up to 3 buttons and an optional, labeled checkbox.
... return value true for ok, false for cancel promptusernameandpassword() shows a dialog with an edit field, a password field, and an optional, labeled checkbox.
...And 11 more matches

delete operator - JavaScript
return value true for all cases except when the property is an own non-configurable property, in which case, false is returned in non-strict mode.
...on successful deletion, it will return true, else false will be returned.
... however, it is important to consider the following scenarios: if the property which you are trying to delete does not exist, delete will not have any effect and will return true.
...And 11 more matches

MCD, Mission Control Desktop, AKA AutoConfig - Archive of obsolete content
etenv("user") != "") { // *nix settings var env_user = getenv("user"); var env_home = getenv("home"); } else { // windows settings var env_user = getenv("username"); var env_home = getenv("homepath"); } var env_mozdebug= getenv("mozilla_debug"); // var env_user = prompt("indiquez votre login", toto); // 2) lock general preferences //ldap address book lockpref("ldap_2.prefs_migrated", true); lockpref("ldap_2.servers.ldapint.auth.savepassword", true); lockpref("ldap_2.servers.ldapint.description", "ldap int"); lockpref("ldap_2.servers.ldapint.filename", "abook-1.mab"); lockpref("ldap_2.servers.ldapint.uri", "ldap://ldap1.int-evry.fr:389/ou=people,dc=int-evry,dc=fr??sub"); lockpref("ldap_2.servers.history.filename", "history.mab"); lockpref("ldap_2.servers.history.replication.lastcha...
...draft_folder", "imap://" + env_user + "@imap-int.int-evry.fr/drafts"); lockpref("mail.identity.id1.drafts_folder_picker_mode", "0"); lockpref("mail.identity.id1.fcc_folder", "imap://" + env_user + "@imap-int.int-evry.fr/sent"); lockpref("mail.identity.id1.fcc_folder_picker_mode", "0"); lockpref("mail.identity.id1.organization", "int evry france"); lockpref("mail.identity.id1.overrideglobal_pref", true); lockpref("mail.identity.id1.reply_to", ""); //imap lockpref("mail.server.server2.hostname", "imap-int.int-evry.fr"); lockpref("mail.server.server2.issecure", true); lockpref("mail.server.server2.login_at_startup", true); lockpref("mail.server.server2.max_cached_connections", 5); //lockpref("mail.server.server2.name", "jehan.procaccia@int-evry.fr"); lockpref("mail.server.server2.type", "imap");...
... lockpref("mail.server.server2.username", env_user); //smtp lockpref("mail.identity.id1.smtpserver", "smtp1"); lockpref("mail.identity.id1.stationery_folder", "imap://" + env_user + "@imap-int.int-evry.fr/templates"); lockpref("mail.identity.id1.tmpl_folder_picker_mode", "0"); lockpref("mail.identity.id1.valid", true); //smtp general lockpref("mail.smtp.defaultserver", "smtp1"); lockpref("mail.smtpserver.smtp1.auth_method", 0); lockpref("mail.smtpserver.smtp1.hostname", "smtp-int.int-evry.fr"); lockpref("mail.smtpserver.smtp1.port", 25); lockpref("mail.smtpserver.smtp1.try_ssl", 0); lockpref("mail.smtpserver.smtp1.username", ""); lockpref("mail.smtpservers", "smtp1"); lockpref("mail.startup.enabledmailcheckonce", true); lockpref("mailnews.quotingprefs.version", 1); lockpref("mailnews.ui.thre...
...And 10 more matches

Browser Feature Detection - Archive of obsolete content
dom 1 html 100% 100% 100% 100% / 100% 100% / 100% dom css 1 100% 100% 100% 100% / 100% 96% / 96% dom css 2 100% 98% 67% 71% / 83% 38% / 42% test results cross reference dom core level 1 support for properties/methods in document name firefox 1.5 ie 6 & 7 opera 8.54 - 9.01 document.doctype true true true document.implementation true true true document.documentelement true true true document.createelement() true true true document.createdocumentfragment() true true true document.createtextnode() true true true document.createcomment() true true true document.createcd...
...atasection() true false true document.createprocessinginstruction() true false true document.createattribute() true true true document.createentityreference()obsolete since gecko 7 (method present but only returns null: bug 9850) false false document.getelementsbytagname() true true true dom core level 2 support for properties/methods in document name firefox 1.5 ie 6 & 7 opera 8.54 - 9.01 document.doctype true true true document.implementation true true true document.documentelement true true true document.createelement() true true true document.createdocumentfragment() true true true docu...
...ment.createtextnode() true true true document.createcomment() true true true document.createcdatasection() true false true document.createprocessinginstruction() true false true document.createattribute() true true true document.createentityreference()obsolete since gecko 7 true false false document.getelementsbytagname() true true true document.importnode() true false true document.createelementns() true false true document.createattributens() true false true document.getelementsbytagnamens() true false true document.getelementbyid() true true true dom level 1 html support for pr...
...And 10 more matches

nsIFile
return value true if infile is a descendant of this nsifile.
... return value true if "infile" is equivalent to this nsifile.
... return value true if the file or directory exists.
...And 10 more matches

tab - Archive of obsolete content
afterselected type: boolean this is set to true if the tab is immediately after the currently selected tab.
... beforeselected type: boolean this is set to true if the tab is immediately before the currently selected tab.
...do not set the attribute to true, as this will suggest you can set it to false to enable the element again, which is not the case.
...And 9 more matches

tree - Archive of obsolete content
eeitem> <treerow> <treecell label="mel@whereever.com"/> <treecell label="let's do lunch"/> </treerow> </treeitem> </treechildren> </tree> a tree with several columns and nested items <tree id="mytree" flex="1" hidecolumnpicker="false" seltype="single" class="tree" rows="5"> <treecols id="mytree2-treecols"> <treecol id="mytree2-treecol0" primary="true" flex="2" label="column a" persist="width" ordinal="1"/> <splitter class="tree-splitter" ordinal="2"/> <treecol id="mytree2-treecol1" flex="1" label="column b" persist="width" ordinal="3"/> </treecols> <treechildren> <treeitem> <treerow> <treecell label="1"/> <treecell label="a"/> </treerow> </treeitem> <!-- make sure t...
...o set container="true" --> <treeitem container="true" open="true"> <treerow> <treecell label="2"/> <treecell label="b"/> </treerow> <treechildren> <treeitem> <treerow> <treecell label="2a"/> <treecell label="ba"/> </treerow> </treeitem> </treechildren> </treeitem> </treechildren> </tree> attributes disabled type: boolean indicates whether the element is disabled or not.
...do not set the attribute to true, as this will suggest you can set it to false to enable the element again, which is not the case.
...And 9 more matches

Enc Dec MAC Output Public Key as CSR
int)); if (!data->data) { pr_fprintf(pr_stderr, "error while allocating memory\n"); rv = secfailure; goto cleanup; } rv = pk11_pubwrapsymkey(ckm_rsa_pkcs, pubkey, key, data); if (rv != secsuccess) { rv = secfailure; } else { *wrappedkey = data; return secsuccess; } cleanup: if (data) { secitem_freeitem(data, pr_true); } return rv; } /* * generate a symmetric key */ pk11symkey * generatesymkey(pk11slotinfo *slot, ck_mechanism_type mechanism, int keysize, secitem *keyid, secupwdata *pwdata) { secstatus rv; pk11symkey *key; /* generate the symmetric key */ key = pk11_tokenkeygen(slot, mechanism, null, keysize, keyid, pr_false, pwdata); if (!ke...
...(type, &ivitem); if (secparam == null) { pr_fprintf(pr_stderr, "crypt failed : secparam null\n"); return null; } ctx = pk11_createcontextbysymkey(type, operation, key, secparam); if (ctx == null) { pr_fprintf(pr_stderr, "crypt failed : can't create a context\n"); goto cleanup; } cleanup: if (secparam) { secitem_freeitem(secparam, pr_true); } return ctx; } /* * common encryption and decryption code */ secstatus crypt(pk11context *ctx, unsigned char *out, unsigned int *outlen, unsigned int maxout, unsigned char *in, unsigned int inlen) { secstatus rv; rv = pk11_cipherop(ctx, out, outlen, maxout, in, inlen); if (rv != secsuccess) { pr_fprintf(pr_stderr, "crypt failed : pk11_cipherop return...
... this may take a few moments...\n\n"); privkey = pk11_generatekeypair(slot, mechanism, params, pubkeyp, pr_true /*isperm*/, pr_true /*issensitive*/, pwdata); cleanup: return privkey; } /* * extract the public key request from csr */ seckeypublickey * extractpublickeyfromcertrequest(const char *infilename, prbool ascii) { certsigneddata signeddata; secitem reqder; certcertificaterequest *certreq = null; secstatus rv = secsucces...
...And 9 more matches

Encrypt Decrypt_MAC_Using Token
*/ pk11symkey * generatesymkey(pk11slotinfo *slot, ck_mechanism_type mechanism, int keysize, secitem *keyid, secupwdata *pwdata) { secstatus rv; pk11symkey *key; if (pk11_needlogin(slot)) { rv = pk11_authenticate(slot, pr_true, pwdata); if (rv != secsuccess) { pr_fprintf(pr_stderr, "could not authenticate to token %s.\n", pk11_gettokenname(slot)); return null; } } /* generate the symmetric key.
... */ key = pk11_tokenkeygen(slot, mechanism, null, keysize, keyid, pr_true, pwdata); if (!key) { pr_fprintf(pr_stderr, "symmetric key generation failed \n"); } return key; } /* * macinit */ secstatus macinit(pk11context *ctx) { secstatus rv = pk11_digestbegin(ctx); if (rv != secsuccess) { pr_fprintf(pr_stderr, "compute mac failed : pk11_digestbegin()\n"); } return rv; } /* * macupdate */ secstatus macupdate(pk11context *ctx, unsigned char *msg, unsigned int msglen) { secstatus rv = pk11_digestop(ctx, msg, msglen); if (rv != secsuccess) { pr_fprintf(pr_stderr, "compute mac failed : digestop()\n"); } return rv; } /* * finalize macing.
...&ivitem); if (secparam == null) { pr_fprintf(pr_stderr, "crypt failed : secparam null\n"); return null; } ctx = pk11_createcontextbysymkey(ckm_aes_cbc, operation, key, secparam); if (ctx == null) { pr_fprintf(pr_stderr, "crypt failed : can't create a context\n"); goto cleanup; } cleanup: if (secparam) { secitem_freeitem(secparam, pr_true); } return ctx; } /* * common encryption and decryption code.
...And 9 more matches

nsIDocShell
defaults to true.
...default is true, which lets content control the window.
...docshells are active if this is true, which is the default state.
...And 9 more matches

EventTarget.addEventListener() - Web APIs
if true, the listener would be automatically removed when invoked.
... passive a boolean that, if true, indicates that the function specified by listener will never call preventdefault().
...if true, the listener receives synthetic events dispatched by web content (the default is false for browser chrome and true for regular web pages).
...And 9 more matches

Control flow and error handling - JavaScript
conditional statements a conditional statement is a set of commands that executes if a specified condition is true.
... if...else statement use the if statement to execute a statement if a logical condition is true.
... an if statement looks like this: if (condition) { statement_1; } else { statement_2; } here, the condition can be any expression that evaluates to true or false.
...And 9 more matches

<mo> - MathML
allowed values are true or false.
... allowed values are true or false.
... largeop specifies whether the operator should be drawn larger than normal when displaystyle="true" is set.
...And 9 more matches

Download Manager preferences - Archive of obsolete content
default value is true.
... default value is true.
... in thunderbird the default value is true.
...And 8 more matches

preference - Archive of obsolete content
do not set the attribute to true, as this will suggest you can set it to false to enable the element again, which is not the case.
... instantapply type: boolean if true, the preference will be changed as soon as the user interface is modified.
... inverted type: boolean for boolean preferences, if this attribute is set to true, it indicates that the value of the preference is the reverse of the user interface element attached to it.
...And 8 more matches

treecol - Archive of obsolete content
<tree flex="1" editable="true"> <treecols> <treecol label="active" type="checkbox" editable="true"/> <treecol label="name" flex="1" /> </treecols> <treechildren> <treeitem> <treerow> <treecell value="true"/> <treecell label="alice"/> </treerow> </treeitem> <treeitem> <treerow> <treecell value="false"/> <treecell label="bob"/> </treerow> </...
...for example, for a menuitem in a menu you can add the following css rule when you want to use the value none: menupopup > menuitem, menupopup > menu { max-width: none; } cycler type: boolean if true, then the column is a cycler column.
... dragging type: boolean this attribute will be set to true if the column is being dragged.
...And 8 more matches

WAI-ARIA basics - Learn web development
as an example, aria-required="true" specifies that a form input needs to be filled in to be valid, whereas aria-labelledby="label" allows you to put an id on an element, then reference it as being the label for anything else on the page, including multiple elements, which is not possible using <label for="input">.
... states — special properties that define the current conditions of elements, such as aria-disabled="true", which specifies to a screenreader that a form input is currently disabled.
...update your <section> tag again, like so: <section aria-live="assertive" aria-atomic="true"> the aria-atomic="true" attribute tells screenreaders to read out the entire element contents as one atomic unit, not just the bits that were updated.
...And 8 more matches

Displaying Places information using views
<tree type="places" place="place:terms=mozilla&amp;onlybookmarked=1&amp;querytype=1"> <treecols> <treecol id="title" label="my bookmarks" flex="1" primary="true" /> </treecols> <treechildren /> </tree> the next example does the same as the last but uses javascript to set the tree's place attribute: var histserv = cc["@mozilla.org/browser/nav-history-service;1"].
... getservice(ci.nsinavhistoryservice); var query = histserv.getnewquery(); query.searchterms = "mozilla"; query.onlybookmarked = true; var opts = histserv.getnewqueryoptions(); opts.querytype = opts.query_type_bookmarks; var uri = histserv.queriestoquerystring([query], 1, opts); var tree = document.getelementbyid("mytree"); tree.place = uri; these two examples use the built-in tree view, but the point is to demonstrate the use of the place attribute and property.
...the treechildren element should be empty: <tree type="places"> <treecols> <treecol id="title" flex="1" primary="true" /> <treecol id="url" flex="1" /> </treecols> <treechildren /> </tree> the tree view is implemented in browser/components/places/content/tree.xml.
...And 8 more matches

Mozilla DOM Hacking Guide
the first one is the window.location object (the same holds true for document.location, actually).
...once called, init() sets sisinitialized to true, to remember that the initialization has been performed.
... static print32 getarrayindexfromid(jscontext *cx, jsval id, prbool *aisnumber = nsnull): if the js value is an integer, then *aisnumber is true, and the integer is returned.
...And 8 more matches

JSAPI Cookbook
} defining a function // javascript function justforfun() { return null; } /* jsapi */ bool justforfun(jscontext *cx, unsigned argc, js::value *vp) { js::callargs args = js::callargsfromvp(argc, vp); args.rval().setnull(); return true; } ...
... */ js::callargs args = js::callargsfromvp(argc, vp); args.rval().setint32(23); return true; returning a floating-point number // javascript return 3.14159; /* jsapi */ js::callargs args = js::callargsfromvp(argc, vp); args.rval().setdouble(3.14159); exception handling throw the most common idiom is to create a new error object and throw that.
...r example: foo(); bar(); } catch (exc) { // do error-handling stuff here } /* jsapi */ /* try some stuff here; for example: */ if (!js_callfunctionname(cx, global, "foo", 0, null, &r)) goto catch_block; /* instead of returning false */ if (!js_callfunctionname(cx, global, "bar", 0, null, &r)) goto catch_block; /* instead of returning false */ return true; catch_block: js::rootedvalue exc(cx); if (!js_getpendingexception(cx, &exc)) return false; js_clearpendingexception(cx); /* do error-handling stuff here */ return true; finally // javascript try { foo(); bar(); } finally { cleanup(); } if your c/c++ cleanup code doesn't call back into the jsapi, this is straightforward: /* jsapi */ bool success = f...
...And 8 more matches

JS::CompileOptions
versionset bool true if version is set.
... utf8 bool true if the character set of the source code is utf-8.
... compileandgo bool true if the code is going to be evaluated soon after the compile (e.g., false for function constructor and event handler).
...And 8 more matches

Starting WebLock
in short, to register the weblock component as an xpcom-startup observer, do the following: char* previous = nsnull; rv = catman->addcategoryentry("xpcom-startup", "weblock", weblock_contractid, pr_true, // persist category pr_true, // replace existing &previous); if (previous) nsmemory::free(previous); // free the memory the replaced value might have used the unregistration, which should occur in the unregistration callback, looks like this: rv = catman->deletecategoryentry("xpcom-startup", "webl...
...ock", pr_true); // persist a complete code listing for registering weblock as a startup observer follows: #define mozilla_strict_api #include "nsigenericfactory.h" #include "nscomptr.h" #include "nsxpcom.h" #include "nsiservicemanager.h" #include "nsicategorymanager.h" #include "nsmemory.h" #include "nsiobserver.h" #include "nsembedstring.h" #define weblock_cid \ { 0x777f7150, 0x4a2b, 0x4301, \ { 0xad, 0x10, 0x5e, 0xab, 0x25, 0xb3, 0x22, 0xaa}} #define weblock_contractid "@dougt/weblock" class weblock: public nsiobserver { public: weblock(); virtual ~weblock(); ns_decl_isupports ns_decl_nsiobserver }; weblock::weblock() { ns_init_isupports(); } weblock::~weblock() { } ns_impl_isupports1(weblock, nsiobserver); ns_imethodimp ...
...ymanager_contractid, ns_get_iid(nsicategorymanager), getter_addrefs(catman)); if (ns_failed(rv)) return rv; char* previous = nsnull; rv = catman->addcategoryentry("xpcom-startup", "weblock", weblock_contractid, pr_true, pr_true, &previous); if (previous) nsmemory::free(previous); return rv; } static ns_method weblockunregistration(nsicomponentmanager *acompmgr, nsifile *apath, const char *registrylocation, const nsmodulecom...
...And 8 more matches

nsITextInputProcessor
true if it has composition.
...when this is specified, defaultprevented attribute of dispatching keyboard events true.
... return value returns true if the instance could create composition.
...And 8 more matches

Debugger - Firefox Developer Tools
it is an accessor property with a getter and setter: assigning to it enables or disables this debugger instance; reading it produces true if the instance is enabled, or false otherwise.
... this property is initially true in a freshly created debugger instance.
... setting this flag to true is intended for uses of subsystems of the debugger api (e.g, debugger.source) for purposes other than step debugging a target javascript program.
...And 8 more matches

Fullscreen API - Web APIs
obsolete properties document.fullscreen a boolean value which is true if the document has an element currently being displayed in full-screen mode; otherwise, this returns false.
...te name alternate name uses the non-standard name: webkitisfullscreenfirefox full support 64 full support 64 no support 49 — 65disabled disabled from version 49 until version 65 (exclusive): this feature is behind the full-screen-api.unprefix.enabled preference (needs to be set to true).
...alternate name uses the non-standard name: webkitisfullscreenfirefox android full support 64 full support 64 no support 49 — 65disabled disabled from version 49 until version 65 (exclusive): this feature is behind the full-screen-api.unprefix.enabled preference (needs to be set to true).
...And 8 more matches

ARIA Test Cases - Accessibility
at should indicate that it is a toggle button (not a regular button) markup used: role="button" aria-pressed="false" (or true) notes: results: at firefox ie opera safari jaws 9 - - n/a n/a jaws 10 pass in non-v-pc-mode, button's state is announced when pressed, or when toggling it to pressed.
... markup used: role="checkbox" aria-checked="true" or "false" notes: need testcase where aria-checked attribute is removed instead of set to false results: at firefox ie opera safari jaws 9 - - n/a n/a jaws 10 pass fail (changes not spoken) fail fail voiceover (leopard) n/a n/a - fail window-eyes pass pass fail (unchecked prese...
... markup used: role="checkbox" aria-checked="true" | "false" | "mixed" notes: results: at firefox ie opera safari jaws 9 - - n/a n/a jaws 10 partial pass.
...And 8 more matches

ARIA: switch role - Accessibility
<button type="button" role="switch" aria-checked="true" id="speakerpower" class="switch"> <span>off</span> <span>on</span> </button> <label for="speakerpower" class="switch">speaker power</label> description the aria switch role is identical to the checkbox role, except instead of being "checked" or "unchecked", it is either "on" and "off." like the checkbox role, the aria-checked attribute is required.
... the two possible values are true and false.
...a value of true represents the "on" state; false represents the "off" state; a value of mixed is not supported by the switch role, and is treated as false.
...And 8 more matches

@supports - CSS: Cascading Style Sheets
the following example returns true if the browser's transform-origin property considers 5% 5% valid: @supports (transform-origin: 5% 5%) {} function syntax the second basic supports condition is a supports function, the syntax for these is supported by all browsers, but the functions themselves are still being standardized.
...the following example returns true if the browser supports the child combinator: @supports selector(a > b) {} the not operator the not operator can precede any expression to create a new expression, resulting in the negation of the original one.
... the following example returns true if the browser's transform-origin property doesn't consider 10em 10em 10em valid: @supports not (transform-origin: 10em 10em 10em) {} as with any operator, the not operator can be applied to a declaration of any complexity.
...And 8 more matches

Equality comparisons and sameness - JavaScript
var num = 0; var obj = new string('0'); var str = '0'; console.log(num === num); // true console.log(obj === obj); // true console.log(str === str); // true console.log(num === obj); // false console.log(num === str); // false console.log(obj === str); // false console.log(null === undefined); // false console.log(obj === null); // false console.log(obj === undefined); // false strict equality is almost always the correct comparison operation to use.
...(the only case in which (x !== x) is true is when x is nan.) loose equality using == loose equality compares two values for equality, after converting both values to a common type.
... the equality comparison is performed as follows for operands of the various types: operand b undefined null number string boolean object operand a undefined true true false false false false null true true false false false false number false false a === b a === tonumber(b) a === tonumber(b) a == toprimitive(b) string false false tonumber(a) === b a === b tonumber(a) === tonumber(b) a == toprimitive(b) boolean false false tonumber(a) === b ...
...And 8 more matches

url - Archive of obsolete content
isvaliduri("http://mozilla.org") would return true, whereas isvaliduri("mozilla.org") would return false.
...for example: var url = require("sdk/url").url("https://developer.mozilla.org/add-ons?example=true&visible=yes#top"); console.log(url.scheme); // https userpass the username:password part of the url, null if not present.
...for example: var url = require("sdk/url").url("https://developer.mozilla.org/add-ons?example=true&visible=yes#top"); console.log(url.host); // developer.mozilla.org port the port number of the url, null if none was specified.
...And 7 more matches

Interaction between privileged and non-privileged pages - Archive of obsolete content
var myextension = { mylistener: function(evt) { alert("received from web page: " + evt.target.getattribute("attribute1") + "/" + evt.target.getattribute("attribute2")); } } document.addeventlistener("myextensionevent", function(e) { myextension.mylistener(e); }, false, true); // the last value is a mozilla-specific value to indicate untrusted content is allowed to trigger the event.
...trigger the alert() in the listener and pass the data from the web page, write code such as this in the web page: var element = document.createelement("myextensiondataelement"); element.setattribute("attribute1", "foobar"); element.setattribute("attribute2", "hello world"); document.documentelement.appendchild(element); var evt = document.createevent("events"); evt.initevent("myextensionevent", true, false); element.dispatchevent(evt); this code creates an arbitrary element -- <myextensiondataelement/> -- and inserts it into the web page's dom.
...nents.interfaces.nsiwebnavigation) .queryinterface(components.interfaces.nsidocshelltreeitem) .roottreeitem .queryinterface(components.interfaces.nsiinterfacerequestor) .getinterface(components.interfaces.nsidomwindow); mainwindow.document.addeventlistener("myextensionevent", function(e) { myextension.mylistener(e); }, false, true); if you need to to pass lots of data, consider using cdata sections instead of the simple attributes on a custom element.
...And 7 more matches

Using microformats - Archive of obsolete content
if provided, this is a javascript object that contains zero or more of the following flags: recurseexternalframes if true, child frames are included in the search.
... the default is true.
... showhidden if true, hidden microformats are added; otherwise they're left out.
...And 7 more matches

File object - Archive of obsolete content
file.isdirectory true if the file is a directory.
... file.isfile true if the file is a file.
... file.exists true if the file exists.
...And 7 more matches

Extensions - Archive of obsolete content
for instance, the 'onlink' property is set to true when a link was context-clicked.
... ontextinput true if the target is a plain or password type input, a textarea, or an editable area.
... onimage true if the target is an image.
...And 7 more matches

wizard - Archive of obsolete content
firstpage type: boolean true if the wizard is on the first page.
... lastpage type: boolean true if the wizard is on the last page.
... values for window type as found on mxr: http://mxr.mozilla.org/mozilla-release/search?string=windowtype navigator:browser - looks like if window has gbrowser it has this window type devtools:scratchpad - scratchpad windows navigator:view-source - the view source windows properties canadvance type: boolean this property is set to true if the user can press the next button to go to the next page.
...And 7 more matches

LiveConnect Overview - Archive of obsolete content
however, suppose myfunction is defined in javascript as follows: function myfunction() { try { if (thecondition == true) { return "everything's ok"; } else { throw "javascript error occurred"; } } catch (e) { if (canhandle == true) { handleit(); } else { throw e; } } } if thecondition is false, the function throws an exception.
... the exception is caught in the javascript code, and if canhandle is true, javascript handles it.
... other values are converted to true.
...And 7 more matches

JavaScript basics - Learn web development
let myvariable = 10; boolean this is a true/false value.
... the words true and false are special keywords that don't need quote marks.
... let myvariable = true; array this is a structure that allows you to store multiple values in a single reference.
...And 7 more matches

Encrypt Decrypt MAC Keys As Session Objects
f(pr_stderr, "could not read symkey cka_id attribute\n"); return rv; } return rv; } /* * generate a symmetric key */ pk11symkey * generatesymkey(pk11slotinfo *slot, ck_mechanism_type mechanism, int keysize, secitem *keyid, secupwdata *pwdata) { secstatus rv; pk11symkey *key; if (pk11_needlogin(slot)) { rv = pk11_authenticate(slot, pr_true, pwdata); if (rv != secsuccess) { pr_fprintf(pr_stderr, "could not authenticate to token %s.\n", pk11_gettokenname(slot)); return null; } } /* generate the symmetric key */ key = pk11_tokenkeygen(slot, mechanism, null, keysize, keyid, pr_true, pwdata); if (!key) { pr_fprintf(pr_stde...
...&ivitem); if (secparam == null) { pr_fprintf(pr_stderr, "crypt failed : secparam null\n"); return null; } ctx = pk11_createcontextbysymkey(ckm_aes_cbc, operation, key, secparam); if (ctx == null) { pr_fprintf(pr_stderr, "crypt failed : can't create a context\n"); goto cleanup; } cleanup: if (secparam) { secitem_freeitem(secparam, pr_true); } return ctx; } /* * common encryption and decryption code */ secstatus crypt(pk11context *ctx, unsigned char *out, unsigned int *outlen, unsigned int maxout, unsigned char *in, unsigned int inlen) { secstatus rv; rv = pk11_cipherop(ctx, out, outlen, maxout, in, inlen); if (rv != secsuccess) { pr_fprintf(pr_stderr, "crypt failed : pk11_cipherop return...
...0] = paddinglength; paditem.type = sibuffer; paditem.data = (unsigned char *)pad; paditem.len = sizeof(pad[0]); writetoheaderfile(paditem.data, paditem.len, pad, headerfile); if (rv != secsuccess) { pr_fprintf(pr_stderr, "write pad failure\n"); goto cleanup; } rv = secsuccess; cleanup: if (ctxmac != null) { pk11_destroycontext(ctxmac, pr_true); } if (ctxenc != null) { pk11_destroycontext(ctxenc, pr_true); } return rv; } /* * find the key for the given mechanism */ pk11symkey* findkey(pk11slotinfo *slot, ck_mechanism_type mechanism, secitem *keybuf, secupwdata *pwdata) { secstatus rv; pk11symkey *key; if (pk11_needlogin(slot)) { rv = pk11_authenticate(slot, pr_tru...
...And 7 more matches

Encrypt and decrypt MAC using token
f(pr_stderr, "could not read symkey cka_id attribute\n"); return rv; } return rv; } /* * generate a symmetric key */ pk11symkey * generatesymkey(pk11slotinfo *slot, ck_mechanism_type mechanism, int keysize, secitem *keyid, secupwdata *pwdata) { secstatus rv; pk11symkey *key; if (pk11_needlogin(slot)) { rv = pk11_authenticate(slot, pr_true, pwdata); if (rv != secsuccess) { pr_fprintf(pr_stderr, "could not authenticate to token %s.\n", pk11_gettokenname(slot)); return null; } } /* generate the symmetric key */ key = pk11_tokenkeygen(slot, mechanism, null, keysize, keyid, pr_true, pwdata); if (!key) { pr_fprintf(pr_stde...
...&ivitem); if (secparam == null) { pr_fprintf(pr_stderr, "crypt failed : secparam null\n"); return null; } ctx = pk11_createcontextbysymkey(ckm_aes_cbc, operation, key, secparam); if (ctx == null) { pr_fprintf(pr_stderr, "crypt failed : can't create a context\n"); goto cleanup; } cleanup: if (secparam) { secitem_freeitem(secparam, pr_true); } return ctx; } /* * common encryption and decryption code */ secstatus crypt(pk11context *ctx, unsigned char *out, unsigned int *outlen, unsigned int maxout, unsigned char *in, unsigned int inlen) { secstatus rv; rv = pk11_cipherop(ctx, out, outlen, maxout, in, inlen); if (rv != secsuccess) { pr_fprintf(pr_stderr, "crypt failed : pk11_cipherop return...
...0] = paddinglength; paditem.type = sibuffer; paditem.data = (unsigned char *)pad; paditem.len = sizeof(pad[0]); writetoheaderfile(paditem.data, paditem.len, pad, headerfile); if (rv != secsuccess) { pr_fprintf(pr_stderr, "write pad failure\n"); goto cleanup; } rv = secsuccess; cleanup: if (ctxmac != null) { pk11_destroycontext(ctxmac, pr_true); } if (ctxenc != null) { pk11_destroycontext(ctxenc, pr_true); } return rv; } /* * find the key for the given mechanism */ pk11symkey* findkey(pk11slotinfo *slot, ck_mechanism_type mechanism, secitem *keybuf, secupwdata *pwdata) { secstatus rv; pk11symkey *key; if (pk11_needlogin(slot)) { rv = pk11_authenticate(slot, pr_tru...
...And 7 more matches

NSS Sample Code Sample_3_Basic Encryption and MACing
f(pr_stderr, "could not read symkey cka_id attribute\n"); return rv; } return rv; } /* * generate a symmetric key */ pk11symkey * generatesymkey(pk11slotinfo *slot, ck_mechanism_type mechanism, int keysize, secitem *keyid, secupwdata *pwdata) { secstatus rv; pk11symkey *key; if (pk11_needlogin(slot)) { rv = pk11_authenticate(slot, pr_true, pwdata); if (rv != secsuccess) { pr_fprintf(pr_stderr, "could not authenticate to token %s.\n", pk11_gettokenname(slot)); return null; } } /* generate the symmetric key */ key = pk11_tokenkeygen(slot, mechanism, null, keysize, keyid, pr_true, pwdata); if (!key) { pr_fprintf(pr_stde...
...&ivitem); if (secparam == null) { pr_fprintf(pr_stderr, "crypt failed : secparam null\n"); return null; } ctx = pk11_createcontextbysymkey(ckm_aes_cbc, operation, key, secparam); if (ctx == null) { pr_fprintf(pr_stderr, "crypt failed : can't create a context\n"); goto cleanup; } cleanup: if (secparam) { secitem_freeitem(secparam, pr_true); } return ctx; } /* * common encryption and decryption code */ secstatus crypt(pk11context *ctx, unsigned char *out, unsigned int *outlen, unsigned int maxout, unsigned char *in, unsigned int inlen) { secstatus rv; rv = pk11_cipherop(ctx, out, outlen, maxout, in, inlen); if (rv != secsuccess) { pr_fprintf(pr_stderr, "crypt failed : pk11_cipherop return...
...0] = paddinglength; paditem.type = sibuffer; paditem.data = (unsigned char *)pad; paditem.len = sizeof(pad[0]); writetoheaderfile(paditem.data, paditem.len, pad, headerfile); if (rv != secsuccess) { pr_fprintf(pr_stderr, "write pad failure\n"); goto cleanup; } rv = secsuccess; cleanup: if (ctxmac != null) { pk11_destroycontext(ctxmac, pr_true); } if (ctxenc != null) { pk11_destroycontext(ctxenc, pr_true); } return rv; } /* * find the key for the given mechanism */ pk11symkey* findkey(pk11slotinfo *slot, ck_mechanism_type mechanism, secitem *keybuf, secupwdata *pwdata) { secstatus rv; pk11symkey *key; if (pk11_needlogin(slot)) { rv = pk11_authenticate(slot, pr_tru...
...And 7 more matches

nss tech note5
utbuf, &tmp1_outlen, sizeof outbuf, inbuf, inbuflen); s = pk11_digestfinal(enccontext, outbuf+tmp1_outlen, &tmp2_outlen, sizeof outbuf - tmp1_outlen); result_len = tmp1_outlen + tmp2_outlen; <big>destroy the context pk11_destroycontext(enccontext, pr_true);</big> <big>repeat step 6 any number of times.
... when all done with encrypt/decrypt ops, clean up</big> <big>pk11_freesymkey(symkey); secitem_freeitem(secparam, pr_true); pk11_freeslot(slot);</big> note: aes encryption, a fixed blocksize of 16 bytes is used.
... = pk11_createdigestcontext(sec_oid_md5); <big>digest the data</big> <big>secstatus s = pk11_digestbegin(digestcontext); s = pk11_digestop(digestcontext, data, sizeof data); s = pk11_digestfinal(digestcontext, digest, &len, sizeof digest); /* now, digest contains the 'digest', and len contains the length of the digest */</big> clean up pk11_destroycontext(digestcontext, pr_true); you can also look at a sample program illustrating this hash / digest with secret key included include headers #include "nss.h" #include "pk11pub.h" make sure nss is initialized.the simplest init function, in case you don't need a nss database is nss_nodb_init(".") choose a digest mechanism.
...And 7 more matches

WindowOrWorkerGlobalScope.setInterval() - Web APIs
<!doctype html> <html> <head> <meta charset="utf-8" /> <title>javascript typewriter - mdn example</title> <script> function typewriter (sselector, nrate) { function clean () { clearinterval(nintervid); btyping = false; bstart = true; ocurrent = null; asheets.length = nidx = 0; } function scroll (osheet, npos, beraseandstop) { if (!osheet.hasownproperty('parts') || amap.length < npos) { return true; } var orel, bexit = false; if (amap.length === npos) { amap.push(0); } while (amap[npos] < osheet.parts.length) { orel = osheet.parts[amap[npos]]; scroll(orel, npos + 1, beraseandstop) ...
...amap[npos]++ : bexit = true; if (beraseandstop && (orel.ref.nodetype - 1 | 1) === 3 && orel.ref.nodevalue) { bexit = true; ocurrent = orel.ref; spart = ocurrent.nodevalue; ocurrent.nodevalue = ''; } osheet.ref.appendchild(orel.ref); if (bexit) { return false; } } amap.length--; return true; } function typewrite () { if (spart.length === 0 && scroll(asheets[nidx], 0, true) && nidx++ === asheets.length - 1) { clean(); return; } ocurrent.nodevalue += spart.charat(0); spart = spart.slice(1); } function sheet (onode) { this.ref = onode; if (!onode.haschildnodes()) { return; } this.parts = array.prototype.slice.call(onode.childnodes); for (var nchild = 0; nchild < this.parts.length; nchil...
...d++) { onode.removechild(this.parts[nchild]); this.parts[nchild] = new sheet(this.parts[nchild]); } } var nintervid, ocurrent = null, btyping = false, bstart = true, nidx = 0, spart = "", asheets = [], amap = []; this.rate = nrate || 100; this.play = function () { if (btyping) { return; } if (bstart) { var aitems = document.queryselectorall(sselector); if (aitems.length === 0) { return; } for (var nitem = 0; nitem < aitems.length; nitem++) { asheets.push(new sheet(aitems[nitem])); /* uncomment the following line if you have previously hidden your elements via css: */ // aitems[nitem].style.visibility = "visible"; } bstart = false; } nintervid = setinterval(typewrite, this.rate); btyp...
...And 7 more matches

ARIA: button role - Accessibility
the aria-pressed attribute values of true or false identify a button as a toggle button.
... a menu button is a button that controls a menu and has an aria-haspopup property attribute set to either menu or true.
...the values include aria-pressed="false" when a button is not currently pressed, aria-pressed="true" to indicate a button is currently pressed, and aria-pressed="mixed" if the button is considered to be partially pressed.
...And 7 more matches

Object.defineProperty() - JavaScript
they share the following optional keys (note: the default value is in the case of defining properties using object.defineproperty()): configurable true if and only if the type of this property descriptor may be changed and if the property may be deleted from the corresponding object.
... enumerable true if and only if this property shows up during enumeration of the properties on the corresponding object.
... writable true if and only if the value associated with the property may be changed with an assignment operator.
...And 7 more matches

this - JavaScript
// in web browsers, the window object is also the global object: console.log(this === window); // true a = 37; console.log(window.a); // 37 this.b = "mdn"; console.log(window.b) // "mdn" console.log(b) // "mdn" note: you can always easily get the global object using the global globalthis property, regardless of the current context in which your code is running.
... function f1() { return this; } // in a browser: f1() === window; // true // in node: f1() === globalthis; // true in strict mode, however, if the value of this is not set when entering an execution context, it remains as undefined, as shown in the following example: function f2() { 'use strict'; // see strict mode return this; } f2() === undefined; // true in the second example, this should be undefined, because f2 was called directly and not as a method or property of an object (e.g.
...in global code, it will be set to the global object: var globalobject = this; var foo = (() => this); console.log(foo() === globalobject); // true note: if this arg is passed to call, bind, or apply on invocation of an arrow function it will be ignored.
...And 7 more matches

util/array - Archive of obsolete content
globals functions has(array, element) returns true if the given array contains the element or false otherwise.
... let { has } = require('sdk/util/array'); let a = ['rock', 'roll', 100]; has(a, 'rock'); // true has(a, 'rush'); // false has(a, 100); // true parameters array : array the array to search.
... hasany(array, elements) returns true if the given array contains any of the elements in the elements array, or false otherwise.
...And 6 more matches

window/utils - Archive of obsolete content
getxulwindow(window) returns the nsixulwindow for the given nsidomwindow: var { ci } = require('chrome'); var utils = require('sdk/window/utils'); var active = utils.getmostrecentbrowserwindow(); active instanceof ci.nsixulwindow // => false utils.getxulwindow(active) instanceof ci.nsixulwindow // => true parameters window : nsidomwindow returns nsixulwindow getbasewindow(window) returns the nsibasewindow for the given nsidomwindow: var { ci } = require('chrome'); var utils = require('sdk/window/utils'); var active = utils.getmostrecentbrowserwindow(); active instanceof ci.nsibasewindow // => false utils.getbasewindow(active) instanceof ci.nsibasewindow // => true parameters window : nsid...
...omwindow returns nsibasewindow gettoplevelwindow(window) returns the toplevel nsidomwindow for the given child nsidomwindow: var { ci } = require('chrome'); var utils = require('sdk/window/utils'); var browserwindow = utils.getmostrecentbrowserwindow(); var window = browserwindow.content; // `window` object for the current webpage utils.gettoplevelwindow(window) == browserwindow // => true parameters window : nsidomwindow returns nsidomwindow getwindowdocshell(window) returns the nsidocshell for the tabbrowser element.
... features object map of features to set for the window, defined like this: { width: 10, height: 15, chrome: true }.
...And 6 more matches

Install Manifests - Archive of obsolete content
examples <em:developer>jane doe</em:developer> <em:developer>koos van der merwe</em:developer> hasembeddedwebextension if present and given the value "true", this indicates that this add-on contains an embedded webextension.
... <em:hasembeddedwebextension>true</em:hasembeddedwebextension> homepageurl a link to the add-on's home page - intended for display in the user interface.
... skinnable a true or false value property that tells the application whether the (complete) theme can be skinned by lightweight themes/personas: examples <em:skinnable>true</em:skinnable> strictcompatibility a boolean value indicating if the add-on should be enabled when the version of the application is greater than its max version.
...And 6 more matches

Tabbed browser - Archive of obsolete content
inished loading yet) var newtabbrowser = gbrowser.getbrowserfortab(gbrowser.addtab("http://www.google.com/")); alert(newtabbrowser.contentdocument.body.innerhtml); // better way var newtabbrowser = gbrowser.getbrowserfortab(gbrowser.addtab("http://www.google.com/")); newtabbrowser.addeventlistener("load", function () { newtabbrowser.contentdocument.body.innerhtml = "<div>hello world</div>"; }, true); (the event target in the onload handler will be a 'tab' xul element).
... xul: <menuitem oncommand="myextension.foo(event)" onclick="checkformiddleclick(this, event)" label="click me"/> js: var myextension = { foo: function(event) { openuilink("http://www.example.com", event, false, true); } } opening a url in an on demand tab cu.import("resource://gre/modules/xpcomutils.jsm"); xpcomutils.definelazyservicegetter(this, "gsessionstore", "@mozilla.org/browser/sessionstore;1", "nsisessionstore"); // create new tab, but don't load the content.
... var url = "https://developer.mozilla.org"; var tab = gbrowser.addtab(null, {relatedtocurrent: true}); gsessionstore.settabstate(tab, json.stringify({ entries: [ { title: url } ], usertypedvalue: url, usertypedclear: 2, lastaccessed: tab.lastaccessed, index: 1, hidden: false, attributes: {}, image: null })); reusing tabs rather than open a new browser or new tab each and every time one is needed, it is good practice to try to re-use an existing tab which already displays the desired url--if one is already open.
...And 6 more matches

MenuItems - Archive of obsolete content
<menu label="view" accesskey="v"> <menupopup> <menuitem label="show toolbar" accesskey="t" type="checkbox" checked="true"/> <menuitem label="show status bar" accesskey="s" type="checkbox"/> </menupopup> </menu> both menuitems are of the checkbox type.
... the first menuitem is checked by default, as indicated by the checked attribute set to the value true.
... <script> function changetoolbarstate(event) { if (event.target.getattribute("checked") == "true") showtoolbar(); else hidetoolbar(); } </script> ...
...And 6 more matches

XUL element attributes - Archive of obsolete content
allowevents type: boolean if true, events are passed to children of the element.
...this attribute, if true, which is the default, allows a datasource to negate an earlier assertion.
...this attribute, if true, which is the default, allows a datasource to negate an earlier assertion.
...And 6 more matches

panel - Archive of obsolete content
close type: boolean if the panel has a titlebar, set the panel's close attribute to true to have a close button appear on the titlebar.
...if it set to true the rollup event is consumed.
...if true, the escape key cannot be used to close the panel.
...And 6 more matches

Beginning our React todo list - Learn web development
nput type="text" id="new-todo-input" classname="input input__lg" name="text" autocomplete="off" /> <button type="submit" classname="btn btn__primary btn__lg"> add </button> </form> <div classname="filters btn-group stack-exception"> <button type="button" classname="btn toggle-btn" aria-pressed="true"> <span classname="visually-hidden">show </span> <span>all</span> <span classname="visually-hidden"> tasks</span> </button> <button type="button" classname="btn toggle-btn" aria-pressed="false"> <span classname="visually-hidden">show </span> <span>active</span> <span classname="visually-hidden"> tasks</span> </but...
...sually-hidden"> tasks</span> </button> </div> <h2 id="list-heading"> 3 tasks remaining </h2> <ul role="list" classname="todo-list stack-large stack-exception" aria-labelledby="list-heading" > <li classname="todo stack-small"> <div classname="c-cb"> <input id="todo-0" type="checkbox" defaultchecked={true} /> <label classname="todo-label" htmlfor="todo-0"> eat </label> </div> <div classname="btn-group"> <button type="button" classname="btn"> edit <span classname="visually-hidden">eat</span> </button> <button type="button" classname="btn btn__danger"> delete <span classname="vis...
...for example: <button type="button" classname="btn toggle-btn" aria-pressed="true"> <span classname="visually-hidden">show </span> <span>all</span> <span classname="visually-hidden"> tasks</span> </button> here, aria-pressed tells assistive technology (like screen readers) that the button can be in one of two states: pressed or unpressed.
...And 6 more matches

Frame script loading and lifetime
the script just writes "foo" to the command line: // chrome script var mm = gbrowser.selectedbrowser.messagemanager; mm.loadframescript('data:,dump("foo\\n")', true); loadframescript() takes two mandatory parameters: a url that points to the frame script you want to load a boolean flag, allowdelayedload note: if the message manager is a global frame message manager or a window message manager, loadframescript() may load the script multiple times, once in each applicable frame.
... to define the mapping between a chrome:// url and a frame script packaged with an extension, use a "chrome.manifest" file to register a chrome url: // chrome.manifest content my-e10s-extension chrome/content/ // chrome script mm.loadframescript("chrome://my-e10s-extension/content/content.js", true); allowdelayedload if the message manager is a global frame message manager or a window message manager then: if allowdelayedload is true, the frame script will be loaded into any new frame, which has opened after the loadframescript() call.
... for example: var mm = window.messagemanager; mm.loadframescript("chrome://my-e10s-extension/content/frame-script.js", true); the script will be loaded into all tabs currently open in this window, and all new tabs opened afterwards.
...And 6 more matches

IME handling guide
are available if beginnativeinputtransaction() return true.
... if all merged text changes were caused by composition, imenotification::mtextchangedata::mcausedonlybycomposition is set to true.
... if at least one text change of the merged text changes was caused by current composition, imenotification::mtextchangedata::mincludingchangesduringcomposition is set to true.
...And 6 more matches

Download
this property can become true, then it can be reset to false when a canceled download is restarted.
... this property becomes true as soon as the cancel() method is called, though the stopped property might remain false until the cancellation request has been processed.
... temporary files or part files may still exist even if they are expected to be deleted, until the stopped property becomes true.
...And 6 more matches

EncDecMAC using token object - sample 3
_stderr, "pk11_readrawattribute returned (%d)\n", rv); pr_fprintf(pr_stderr, "could not read symkey cka_id attribute\n"); return rv; } return rv; } /* * generate a symmetric key */ pk11symkey * generatesymkey(pk11slotinfo *slot, ck_mechanism_type mechanism, int keysize, secitem *keyid, secupwdata *pwdata) { secstatus rv; pk11symkey *key; if (pk11_needlogin(slot)) { rv = pk11_authenticate(slot, pr_true, pwdata); if (rv != secsuccess) { pr_fprintf(pr_stderr, "could not authenticate to token %s.\n", pk11_gettokenname(slot)); return null; } } /* generate the symmetric key */ key = pk11_tokenkeygen(slot, mechanism, null, keysize, keyid, pr_true, pwdata); if (!key) { pr_fprintf(pr_stderr, "symmetric key generation failed \n"); } return key; } /* * macinit */ secstatus macinit(pk11context *ctx) { sec...
...t *ctx = null; secitem *secparam = pk11_paramfromiv(ckm_aes_cbc, &ivitem); if (secparam == null) { pr_fprintf(pr_stderr, "crypt failed : secparam null\n"); return null; } ctx = pk11_createcontextbysymkey(ckm_aes_cbc, operation, key, secparam); if (ctx == null) { pr_fprintf(pr_stderr, "crypt failed : can't create a context\n"); goto cleanup; } cleanup: if (secparam) { secitem_freeitem(secparam, pr_true); } return ctx; } /* * common encryption and decryption code */ secstatus crypt(pk11context *ctx, unsigned char *out, unsigned int *outlen, unsigned int maxout, unsigned char *in, unsigned int inlen) { secstatus rv; rv = pk11_cipherop(ctx, out, outlen, maxout, in, inlen); if (rv != secsuccess) { pr_fprintf(pr_stderr, "crypt failed : pk11_cipherop returned %d\n", rv); goto cleanup; } cleanup: if (...
...intf(pr_stderr, "write mac failure\n"); goto cleanup; } pad[0] = paddinglength; paditem.type = sibuffer; paditem.data = (unsigned char *)pad; paditem.len = sizeof(pad[0]); writetoheaderfile(paditem.data, paditem.len, pad, headerfile); if (rv != secsuccess) { pr_fprintf(pr_stderr, "write pad failure\n"); goto cleanup; } rv = secsuccess; cleanup: if (ctxmac != null) { pk11_destroycontext(ctxmac, pr_true); } if (ctxenc != null) { pk11_destroycontext(ctxenc, pr_true); } return rv; } /* * find the key for the given mechanism */ pk11symkey* findkey(pk11slotinfo *slot, ck_mechanism_type mechanism, secitem *keybuf, secupwdata *pwdata) { secstatus rv; pk11symkey *key; if (pk11_needlogin(slot)) { rv = pk11_authenticate(slot, pr_true, pwdata); if (rv != secsuccess) { pr_fprintf(pr_stderr, "could not auth...
...And 6 more matches

Places Developer Guide
foldernode.containeropen = true; for (var i=0; i < foldernode.childcount; ++i) { var childnode = foldernode.getchild(i); // some item properties.
... if (type == ci.nsinavhistoryresultnode.result_type_uri) { var uri = childnode.uri; } else if (type == ci.nsinavhistoryresultnode.result_type_folder) { childnode.queryinterface(ci.nsinavhistorycontainerresultnode); childnode.containeropen = true; // now you can iterate over a subfolder's children } } ther available node types are documented in the idl.
...resultcontainernode.containeropen = true; for (var i=0; i < resultcontainernode.childcount; ++i) { var childnode = resultcontainernode.getchild(i); // accessing properties of matching bookmarks var title = childnode.title; var uri = childnode.uri; } updating bookmark items for all items: setitemtitle(aitemid, atitle) - changes an item's title.
...And 6 more matches

nsIHttpChannel
this attribute is true by default, though other factors may prevent pipelining.
... requestsucceeded boolean returns true if the http response code indicates success.
... isnocacheresponse() returns true if the server sent the equivalent of a "cache-control: no-cache" response header.
...And 6 more matches

Debugger.Object - Firefox Developer Tools
callable true if the referent is a callable object (such as a function or a function proxy); false otherwise.
...return true if the property was successfully removed, or if the referent has no such property.
...(this function behaves like the standard object.preventextensions function, except that the object to operate on is implicit and in a different compartment from the caller.) issealed() return true if the referent is sealed—that is, if it is not extensible, and all its properties have been marked as non-configurable.
...And 6 more matches

DevTools API - Firefox Developer Tools
parameters: force {boolean} - if true the target is shift-reloaded i.e.
...if true, the label won't be shown in the tool's tab.
...if true the colors of the icon will be inverted for the light theme.
...And 6 more matches

BluetoothCharacteristicProperties - Web APIs
properties authenticatedsignedwritesread only returns a boolean that is true if signed writing to the characteristic value is permitted.
... broadcastread only returns a boolean that is true if the broadcast of the characteristic value is permitted using the server characteristic configuration descriptor.
... indicateread only returns a boolean that is true if indications of the characteristic value with acknowledgement is permitted.
...And 6 more matches

MutationObserverInit - Web APIs
properties at a minimum, one of childlist, attributes, and/or characterdata must be true when you call observe().
... subtree optional set to true to extend monitoring to the entire subtree of nodes rooted at target.
... childlist optional set to true to monitor the target node (and, if subtree is true, its descendants) for the addition of new child nodes or removal of existing child nodes.
...And 6 more matches

SubtleCrypto.wrapKey() - Web APIs
to export a key, it must have cryptokey.extractable set to true.
...*/ function getkey(keymaterial, salt) { return window.crypto.subtle.derivekey( { "name": "pbkdf2", salt: salt, "iterations": 100000, "hash": "sha-256" }, keymaterial, { "name": "aes-kw", "length": 256}, true, [ "wrapkey", "unwrapkey" ] ); } /* wrap the given key.
...*/ window.crypto.subtle.generatekey( { name: "aes-gcm", length: 256, }, true, ["encrypt", "decrypt"] ) .then((secretkey) => { return wrapcryptokey(secretkey); }) .then((wrappedkey) => { console.log(wrappedkey); }); pkcs #8 wrap this example wraps an rsa private signing key.
...And 6 more matches

Movement, orientation, and motion: A WebXR example - Web APIs
the code looks like this: const xrotationdegreespersecond = 25; const yrotationdegreespersecond = 15; const zrotationdegreespersecond = 35; const enablerotation = true; const allowmouserotation = true; const allowkeyboardmotion = true; const enableforcepolyfill = false; //const session_type = "immersive-vr"; const session_type = "inline"; const mouse_speed = 0.003; xrotationdegreespersecond the number of degrees of rotation to apply around the x axis per second.
... allowmouserotation if true, you can use the mouse to pitch and yaw the view angle.
... allowkeyboardmotion if true, the w, a, s, and d keys move the viewer forward, left, backward, and to the right, while the up and down arrow keys move up and down.
...And 6 more matches

Background audio processing using AudioWorklet - Web APIs
basic code framework the barest framework of an audio processor class looks like this: class myaudioprocessor extends audioworkletprocessor { constructor() { super(); } process(inputlist, outputlist, parameters) { /* using the inputs (or not, as needed), write the output into each of the outputs */ return true; } }; registerprocessor("my-audio-processor", myaudioprocessor); after the implementation of the processor comes a call to the global function registerprocessor(), which is only available within the scope of the audio context's audioworklet, which is the invoker of the processor script as a result of your call to audioworklet.addmodule().
...list[inputnum]; let channelcount = math.min(input.length, output.length); for (let channelnum = 0; channelnum < channelcount; channelnum++) { let samplecount = input[channelnum].length; for (let i = 0; i < samplecount; i++) { let sample = input[channelnum][i]; /* manipulate the sample */ output[channelnum][i] = sample; } } }; return true; } note that when determining the number of sources to process and send through to the corresponding outputs, we use math.min() to ensure that we only process as many channels as we have room for in the output list.
...channelcount; channelnum++) { let samplecount = input[channelnum].length; for (let i = 0; i < samplecount; i++) { let sample = output[channelnum][i] + input[channelnum][i]; if (sample > 1.0) { sample = 1.0; } else if (sample < -1.0) { sample = -1.0; } output[channelnum][i] = sample; } } }; return true; } this is similar code to the previous sample in many ways, but only the first output—outputlist[0]—is altered.
...And 6 more matches

Using the aria-hidden attribute - Accessibility
description adding aria-hidden="true" to an element removes that element and all of its children from the accessibility tree.
... this can improve the experience for assistive technology users by hiding: purely decorative content, such as icons or images duplicated content, such as repeated text offscreen or collapsed content, such as menus according to the fourth rule of aria, aria-hidden="true" should not be used on a focusable element.
... using aria-hidden="false" will not re-expose the element to assistive technology if any of its parents specify aria-hidden="true".
...And 6 more matches

Loops and iteration - JavaScript
if the value of conditionexpression is true, the loop statements execute.
...(if the condition expression is omitted entirely, the condition is assumed to be true.) the statement executes.
...}) to group those statements.) if condition is true, the statement executes again.
...And 6 more matches

Array.prototype.every() - JavaScript
return value true if the callback function returns a truthy value for every array element.
...otherwise, if callback returns a truthy value for all elements, every returns true.
... caution: calling this method on an empty array will return true for any condition!
...And 6 more matches

Object.isFrozen() - JavaScript
var vacuouslyfrozen = object.preventextensions({}); object.isfrozen(vacuouslyfrozen); // === true // a new object with one property is also extensible, // ergo not frozen.
...delete oneprop.p; object.isfrozen(oneprop); // === true // a non-extensible object with a non-writable // but still configurable property is not frozen.
...object.defineproperty(nonwritable, 'e', { configurable: false }); // make non-configurable object.isfrozen(nonwritable); // === true // a non-extensible object with a non-configurable // but still writable property also isn't frozen.
...And 6 more matches

Iteration protocols - JavaScript
(this is equivalent to not specifying the done property altogether.) has the value true if the iterator has completed its sequence.
...can be omitted when done is true.
...string[symbol.iterator]); // "function" string's default iterator returns the string's code points one by one: let iterator = somestring[symbol.iterator](); console.log(iterator + ''); // "[object string iterator]" console.log(iterator.next()); // { value: "h", done: false } console.log(iterator.next()); // { value: "i", done: false } console.log(iterator.next()); // { value: undefined, done: true } some built-in constructs—such as the spread syntax—use the same iteration protocol under the hood: console.log([...somestring]); // ["h", "i"] you can redefine the iteration behavior by supplying our own @@iterator: // need to construct a string object explicitly to avoid auto-boxing let somestring = new string('hi'); somestring[symbol.iterator] = function () { return { // this i...
...And 6 more matches

Equality (==) - JavaScript
this can be roughly summarised as follows: if the operands are both objects, return true only if both operands reference the same object.
... if one operand is null and the other is undefined, return true.
... if one of the operands is boolean, convert the boolean operand to 1 if it is true and +0 if it is false.
...And 6 more matches

Autoplay guide for media and Web Audio APIs - Web media technologies
autoplay availability as a general rule, you can assume that media will be allowed to autoplay only if at least one of the following is true: the audio is muted or its volume is set to 0 the user has interacted with the site (by clicking, tapping, pressing keys, etc.) if the site has been whitelisted; this may happen either automatically if the browser determines that the user engages with media frequently, or manually through preferences or other user interface features if the autoplay feature policy is used to grant autoplay s...
...this sets the autoplay property on the element to true, and when autoplay is true, the media will automatically begin to play as soon as possible after the following have occurred: the page is allowed to use autoplay functionality the element has been created during page load enough media has been received to begin playback and continue to play through to the end of the media without interruption, assuming there are no dramatic changes in networ...
...this is currently false by default (except in nightly builds, where it's true by default).
...And 6 more matches

Classes and Inheritance - Archive of obsolete content
to illustrate this, let's define a simple constructor for a class shape: function shape(x, y) { this.x = x; this.y = y; } we can now use this constructor to create instances of shape: let shape = new shape(2, 3); shape instanceof shape; // => true shape.x; // => 2 shape.y; // => 3 the keyword new tells javascript that we are performing a constructor call.
...when a function is used in a constructor call, javascript makes the value of this property the prototype of the newly created object: let shape = shape(2, 3); object.getprototypeof(shape) == shape.prototype; // => true all instances of a class have the same prototype.
...we can now use the above constructor to create instances of the class circle: let circle = circle(2, 3, 5); circle instanceof circle; // => true circle.x; // => 2 circle.y; // => 3 circle.radius; // => 5 inheritance and prototypes there is a problem with the definition of circle in the previous section that we have glossed over thus far.
...And 5 more matches

context-menu - Archive of obsolete content
predicatecontext(predicatefunction) predicatefunction is called when the menu is invoked, and the context occurs when the function returns a true value.
...if you register a listener function for this event and it returns true, the menu item associated with the listener's content script is shown in the menu.
... but in the example below, node.nodename is not guaranteed to be "p" - for example, it won't be "p" if the user context-clicked a link inside a paragraph: var cm = require("sdk/context-menu"); cm.item({ label: "a paragraph", context: cm.selectorcontext("p"), contentscript: 'self.on("context", function (node) {' + ' console.log(node.nodename);' + ' return true;' + '});' }); the content script is executed for every page that a context menu is shown for.
...And 5 more matches

Chapter 5: Let's build a Firefox extension - Archive of obsolete content
true browser.dom.window.dump.enabled (not present in firefox 3.5+) enables use of the dump method for debugging.
... true javascript.options.showinconsole (present in firefox 3.5+) outputs javascript errors to the error console.
... true javascript.options.strict (present in firefox 3.5+) enforces strict error output from javascript true table 1: preferences to set for developing extensions to make these changes, start your development profile, type about:config into firefox’s location bar and open the preferences window; find the preferences listed in table 1 and double-click on them to set them accordingly.
...And 5 more matches

Dehydra Object Reference - Archive of obsolete content
dehydra only sets boolean flags when they are true.
... for example, a pointer type will have .ispointer == true, but a class type will not have an .ispointer property.
...return t();), no container variable is available; in this case, .isreturn will be true (see function variable).
...And 5 more matches

Elements - Archive of obsolete content
= "http://www.w3.org/2000/svg" xmlns:xlink= "http://www.w3.org/1999/xlink"> binding <!entity % binding-content "(resources?,content?,implementation?,handlers?)"> <!element binding %binding-content;> <!attlist binding id id #required extends cdata #implied display cdata #implied inheritstyle true #implied > the binding element describes a single xbl binding.
...if this attribute is true, styles from the document will also be applied to the xbl generated anonymous content.
... field <!element field empty> <!attlist field id id #implied name cdata #required readonly (true|false) #implied > a field is similar to a property, except that it should not have a getter or setter.
...And 5 more matches

Multiple Rules - Archive of obsolete content
here is another example for an xml source: <radiogroup datasources="people.xml" ref="*" querytype="xml"> <template> <query expr="person"/> <rule> <where subject="?gender" rel="equals" value="male"/> <action> <radio uri="?" label="?name is male"/> </action> </rule> <rule> <action> <radio uri="?" label="?name is female" disabled="true"/> </action> </rule> </template> </radiogroup> in this example, all male people are matched with the first rule, and a radio button is generated for each one.
...by setting the negate attribute to true, the condition matches only those that don't match the condition, reversing the results that match.
... <where subject="?title" rel="equals" value="canal"/> <where subject="?title" rel="equals" value="canal" negate="true"/> you can use the negate attribute with all of the relational operators.
...And 5 more matches

Input Controls - Archive of obsolete content
disabled set to true to have text entry disabled.
...if you set the multiline attribute to true, the text entry field will display multiple rows.
... example 2 : source view <textbox multiline="true" value="this is some text that could wrap onto multiple lines."/> like the html textarea, you can use the rows and cols attributes to set the size.
...And 5 more matches

menulist - Archive of obsolete content
for example, for a menuitem in a menu you can add the following css rule when you want to use the value none: menupopup > menuitem, menupopup > menu { max-width: none; } disableautoselect type: boolean if this attribute is true or omitted, the selected item on the menu will update to match what the user entered in the textbox.
...do not set the attribute to true, as this will suggest you can set it to false to enable the element again, which is not the case.
... focused type: boolean this attribute is true if the element is focused.
...And 5 more matches

tabbrowser - Archive of obsolete content
goforwardgroup, gohome, gotoindex, loadgroup, loadonetab, loadtabs, loaduri, loaduriwithflags, movetabto, pintab, reload, reloadalltabs, reloadtab, reloadwithflags, removealltabsbut, removecurrenttab, removeprogresslistener, removetab, removetabsprogresslistener,replacegroup, selecttabatindex, seticon, showonlythesetabs, stop, unpintab attributes autocompleteenabled type: boolean set to true to enable autocomplete of fields.
...if this attribute is set to true or omitted, autoscroll will be enabled or depending on the user preference general.autoscroll.
... cangoback type: boolean this read-only property is true if there is a page to go back to in the session history and the back button should be enabled.
...And 5 more matches

XForms Custom Controls - Archive of obsolete content
var control = this; var refreshstub = function() { control.refresh(); } this.ref1.refresh = refreshstub; this.ref2.refresh = refreshstub; </constructor> <property name="ref1" readonly="true" onget="return this.ownerdocument.getanonymouselementbyattribute(this, 'anonid', 'ref1');"/> <property name="ref2" readonly="true" onget="return this.ownerdocument.getanonymouselementbyattribute(this, 'anonid', 'ref2');"/> </implementation> new host language the mozilla xforms implementation currently only supports xforms hosted in xhtml or xul documents.
... */ void setvalue(in domstring value); /** * return true if the instance node is readonly as determined by the mdg.
... */ boolean isreadonly(); /** * return true if the instance node is relevant as determined by the mdg.
...And 5 more matches

Looping code - Learn web development
a condition, which is a true/false test to determine whether the loop continues to run, or stops — usually when the counter reaches a certain value.
... an iterator, which generally increments the counter by a small amount on each successive loop, until the condition is no longer true.
...if he has reached 10 portions (the point where the condition is no longer true, so the loop exits), he can stop collecting and go home.
...And 5 more matches

Accessibility API cross-reference
a checkbox; aria has two kinds: use checkbox if you need to express 'mixed' state (some of the descendents are true, some are false), otherwise use switch or (preferred in html) <input type=checkbox>, which are true/false only.
... marquee the main menu bar below the app's title bar menubar menu_bar menu_bar menubar a menu item menuitem menu_item menu_item menuitem a menuitem with a checkable state whose possible values are true, false, or mixed.
... n/a n/a aria-details this is for expandable items that are not expanded, such as folded tree branches or accordions collapsed collapsed collapsed aria-expanded=false different from xul's collapsed="true" attribute which indicates something is hidden this is the default button or menu item default n/a n/a identifies the element that provides an error message for the object.
...And 5 more matches

Using the Browser API
we did this with the following functions: function canmovebwd() { var request = browser.getcangoback(); request.onsuccess = function() { if (request.result) { back.disabled = false; console.log("it's possible to navigate the history backward."); } else { back.disabled = true; console.log("it's not possible to navigate the history backward."); } } } function canmovefwd() { var request = browser.getcangoforward(); request.onsuccess = function() { if (request.result) { fwd.disabled = false; console.log("it's possible to navigate the history forward."); } else { fwd.disabled = true; console.log("it's not possible to navig...
...if true is returned, the relevant button is disabled, and if false is returned, the relevant button is enabled.
...for example: function canmovebwd() { browser.getcangoback().then(function(result) { if (result) { back.disabled = false; console.log("it's possible to navigate the history backward."); } else { back.disabled = true; console.log("it's not possible to navigate the history backward."); } }); } implementing the url bar the url bar for our simple browser is a <form> containing a single text <input>.
...And 5 more matches

MathML Torture Test
> </td></tr> <tr> <td>6</td> <td><img src="https://udn.realityripple.com/samples/76/5ce9da68c6.png" width="220" height="138" alt="texbook, 17.5-17.6" /></td> <td> <math display="block"> <mrow> <msub> <mi>a</mi> <mn>0</mn> </msub> <mo>+</mo> <mfrac> <mn>1</mn> <mstyle displaystyle="true" scriptlevel="0"> <msub> <mi>a</mi> <mn>1</mn> </msub> <mo>+</mo> <mfrac> <mn>1</mn> <mstyle displaystyle="true" scriptlevel="0"> <msub> <mi>a</mi> <mn>2</mn> </msub> <mo>+</mo> ...
... <mfrac> <mn>1</mn> <mstyle displaystyle="true" scriptlevel="0"> <msub> <mi>a</mi> <mn>3</mn> </msub> <mo>+</mo> <mfrac> <mn>1</mn> <mstyle displaystyle="true" scriptlevel="0"> <msub> <mi>a</mi> <mn>4</mn> </msub> </mstyle> </mfrac> </mstyle> </mfrac> </mstyle> </mfrac> </mstyle> </mfrac> </mrow> </math> </td...
... <mo>/</mo> <mn>۲</mn> </mrow> </mfrac> </mrow> </math> </td></tr> <tr> <td>6</td> <td> <math dir="rtl" display="block"> <mrow> <msub> <mi>&#x1ee00;</mi> <mn>٠</mn> </msub> <mo>+</mo> <mfrac> <mn>١</mn> <mstyle displaystyle="true" scriptlevel="0"> <msub> <mi>&#x1ee00;</mi> <mn>١</mn> </msub> <mo>+</mo> <mfrac> <mn>١</mn> <mstyle displaystyle="true" scriptlevel="0"> <msub> <mi>&#x1ee00;</mi> <mn>٢</mn> </msub> ...
...And 5 more matches

PKCS11 Implement
true false the device is uninitialized.
...the nss calls c_initpin to initialize the device and set the user pin; if these calls are successful, the key is generated and at that point the cfk_user_pin_initialized flag should change from false to true.
... false true this is a general access device that can have a pin set on it.
...And 5 more matches

JS::Value
the data in a js::value can be accessed using these member functions: js type js::value type tests constructor accessors mutators null val.isnull() js::nullvalue() n/a val.setnull() undefined val.isundefined() js::undefinedvalue() n/a val.setundefined() boolean val.isboolean(), val.istrue(), val.isfalse() js::booleanvalue(bool), js::truevalue(), js::falsevalue() val.toboolean() val.setboolean(bool) number val.isint32(), val.isdouble(), val.isnumber() js::numbervalue(any number type), js::int32value(int32_t), js::doublevalue(double), js::float32value(float) val.toint32(), val.todouble(), val.tonumber() val.setint32(int32_t), val.setnumber(uint32_t), va...
...the number mutators attempt to use int32_t representation for compatible input values, returning true when int32 could be used and false when double representation was required.
... val.isobjectornull() returns true if the value is either an object or undefined.
...And 5 more matches

nsIAutoCompleteInput
completeselectedindex boolean if true, the text in the text field will be autocompleted as the user selects from the popup list.
... consumerollupevent boolean if true, the event that rolls up the popup should be consumed by the popup itself.
... disableautocomplete boolean true if auto-complete is currently disabled; otherwise false.
...And 5 more matches

nsIMsgProtocolInfo
method overview long getdefaultserverport(in boolean issecure); attributes attribute type description candelete boolean true if an account of this type may be deleted.
... cangetincomingmessages boolean true if junk ui actions should be enabled for the account type.
... cangetmessages boolean true if "get messages" ui actions should be enabled for the account type.
...And 5 more matches

nsISelectionController
void wordmove(in boolean forward, in boolean extend); attributes attribute type description caretvisible boolean this is true if the caret is enabled, visible, and currently blinking.
... this is still true when the caret is enabled, visible, but in its "off" blink cycle.
... return value true if visible, false if not.
...And 5 more matches

Web Console remoting - Firefox Developer Tools
startlisteners(listeners, onresponse) the new startlisteners packet: { "to": "conn0.console9", "type": "startlisteners", "listeners": [ "pageerror", "consoleapi", "networkactivity", "fileactivity" ] } the reply is: { "startedlisteners": [ "pageerror", "consoleapi", "networkactivity", "fileactivity" ], "nativeconsoleapi": true, "from": "conn0.console9" } the reply tells which listeners were started and it includes a flag nativeconsoleapi which tells if the window.console object was overridden by the scripts in the page or not.
... when page navigation starts the following packet is sent from the tab actor: { "from": tabactor, "type": "tabnavigated", "state": "start", "url": newurl, "nativeconsoleapi": true } the nativeconsoleapi property tells if the window.console object is native or not for the top level window object for the given tab - this is always true when navigation starts.
... when navigation stops the following packet is sent: { "from": tabactor, "type": "tabnavigated", "state": "stop", "url": newurl, "title": newtitle, "nativeconsoleapi": true|false } getcachedmessages(types, onresponse) the webconsoleclient.getcachedmessages(types, onresponse) method sends the following packet to the server: { "to": "conn0.console9", "type": "getcachedmessages", "messagetypes": [ "pageerror", "consoleapi" ] } the getcachedmessages packet allows one to retrieve the cached messages from before the web console was open.
...And 5 more matches

Document - Web APIs
document.mozsyntheticdocument returns a boolean that is true only if this document is synthetic, such as a standalone image, video, audio file, or the like.
... document.fullscreen true when the document is in full-screen mode.
... document.xmlstandalone obsolete since gecko 10 returns true if the xml declaration specifies the document to be standalone (e.g., an external part of the dtd affects the document's content), else false.
...And 5 more matches

Using IndexedDB - Web APIs
objectstore.createindex("email", "email", { unique: true }); // use transaction oncomplete to make sure the objectstore creation is // finished before adding data into it.
...var request = indexeddb.open(dbname, 3); request.onupgradeneeded = function (event) { var db = event.target.result; // create another object store called "names" with the autoincrement flag set as true.
... var objstore = db.createobjectstore("names", { autoincrement : true }); // because the "names" object store has the key generator, the key for the name value is generated automatically.
...And 5 more matches

MediaDevices.getUserMedia() - Web APIs
the following requests both audio and video without any specific requirements: { audio: true, video: true } if true is specified for a media type, the resulting stream is required to have that type of track in it.
...the following expresses a preference for 1280x720 camera resolution: { audio: true, video: { width: 1280, height: 720 } } the browser will try to honour this, but may return other resolutions if an exact match is not available, or the user overrides it.
...the following demands a minimum resolution of 1280x720: { audio: true, video: { width: { min: 1280 }, height: { min: 720 } } } if no camera exists with this resolution or higher, then the returned promise will be rejected with overconstrainederror, and the user will not be prompted.
...And 5 more matches

Slottable - Web APIs
3edge full support 79firefox full support 63 full support 63 no support 59 — 63disabled disabled from version 59 until version 63 (exclusive): this feature is behind the dom.webcomponents.shadowdom.enabled preference (needs to be set to true).
...— 59disabled disabled until version 59 (exclusive): this feature is behind the dom.webcomponents.enabled preference (needs to be set to true) and the dom.webcomponents.shadowdom.enabled preference (needs to be set to true).
... full support 53firefox android full support 63 full support 63 no support 59 — 63disabled disabled from version 59 until version 63 (exclusive): this feature is behind the dom.webcomponents.shadowdom.enabled preference (needs to be set to true).
...And 5 more matches

WebGLRenderingContext.vertexAttribPointer() - Web APIs
for types gl.byte and gl.short, normalizes the values to [-1, 1] if true.
... for types gl.unsigned_byte and gl.unsigned_short, normalizes the values to [0, 1] if true.
...note the use of true because webgl expects our data to be in little-endian.
...And 5 more matches

XRWebGLLayerInit - Web APIs
properties alpha optional the frame buffer's color buffer will be established with an alpha channel if the alpha boolean property is true.
...the default value is true.
... antialias optional a boolean value which is true if anti-aliasing is to be used when rendering in the context; otherwise false.
...And 5 more matches

ARIA: tab role - Accessibility
<button role="tab" aria-selected="true" aria-controls="tabpanel-id" id="tab-id">tab label</button> description an element with the tab role controls the visibility of an associated element with the tabpanel role.
... when working with elements with the tab role, when they are selected or active, they should have their aria-selected attribute set to true, otherwise it should be set to false.
... when a tab is selected or active, its controlled tabpanel should have its aria-expanded and hidden attributes set to true, otherwise they should be set to false.
...And 5 more matches

ARIA: listbox role - Accessibility
all selected options have aria-selected set to true.
... if that's an option element, then that would be the id of the most recently interacted with option, regardless of whether that option has an aria-selected value of true or not.
... aria-multiselectable include and set to true if the user can select more than one option.
...And 5 more matches

ARIA: textbox role - Accessibility
to create a multi-line text box which supports line breaks, as in an html <textarea>, set aria-multiline="true".
... <!-- simple text input field --> <div id="txtboxlabel">enter your five-digit zipcode</div> <div role="textbox" contenteditable="true" aria-placeholder="5-digit zipcode" aria-labelledby="txtboxlabel"></div> <!-- multi-line text area --> <div id="txtboxmultilinelabel">enter the tags for the article</div> <div role="textbox" contenteditable="true" aria-multiline="true" aria-labelledby="txtboxmultilinelabel" aria-required="true"></div> semantic elements are more concise and require no javascript to support textbox features.
... <label for="txtbox">enter your five-digit zipcode</label> <input type="text" placeholder="5-digit zipcode" id="txtbox"/> <!-- multi-line text area --> <label for="txtboxmultiline">enter the tags for the article</label> <textarea id="txtboxmultiline" required></textarea> where a text field is read-only, indicated this by setting aria-readonly="true" on the element.
...And 5 more matches

Using media queries - CSS: Cascading Style Sheets
a media query computes to true when the media type (if specified) matches the device on which a document is being displayed and all media feature expressions compute as true.
...nevertheless, its contents will not apply unless and until the result of the query changes to true.
... and the and operator is used for combining multiple media features together into a single media query, requiring each chained feature to return true in order for the query to be true.
...And 5 more matches

Iterators and generators - JavaScript
done this is true if the last value in the sequence has already been consumed.
...after a terminating value has been yielded additional calls to next() should simply continue to return {done: true}.
... while it is easy to imagine that all iterators could be expressed as arrays, this is not true.
...And 5 more matches

Boolean - JavaScript
all other values, including any object, an empty array ([]), or the string "false", create an object with an initial value of true.
... do not confuse the primitive boolean values true and false with the true and false values of the boolean object.
... any object of which the value is not undefined or null, including a boolean object whose value is false, evaluates to true when passed to a conditional statement.
...And 5 more matches

in operator - JavaScript
the in operator returns true if the specified property is in the specified object or its prototype chain.
... // arrays let trees = ['redwood', 'bay', 'cedar', 'oak', 'maple'] 0 in trees // returns true 3 in trees // returns true 6 in trees // returns false 'bay' in trees // returns false (you must specify the index number, not the value at that index) 'length' in trees // returns true (length is an array property) symbol.iterator in trees // returns true (arrays are iterable, works only in es2015+) // predefined objects 'pi' in math // returns true // custom objects ...
...let mycar = {make: 'honda', model: 'accord', year: 1998} 'make' in mycar // returns true 'model' in mycar // returns true you must specify an object on the right side of the in operator.
...And 5 more matches

OpenClose - Archive of obsolete content
the menu element has an open property which may be set to true to open the menu, or false to close the menu.
... a simple example: somemenu.open = true; this single line of code will open a menu referenced by the variable 'somemenu'.
...here is a complete example which uses a button to open a menu: <button label="open menu" oncommand="document.getelementbyid('editmenu').open = true;"/> <menu id="editmenu" label="edit"> <menupopup> <menuitem label="cut"/> <menuitem label="copy"/> <menuitem label="paste"/> </menupopup> </menu> this technique may be used for both menupopups that use the menu tag, the button tag and the toolbarbutton tag.
...And 4 more matches

prefwindow - Archive of obsolete content
a true value for this preference makes the preference window apply immediately the user choices, without waiting for the dialog to close with ok.
...this one can be safely omitted in xulrunner-based applications but you can override the default behavior (true for mac os x and false for other platforms) setting it.
...if it is set to true any changes to settings are supposed to be applied immediately.
...And 4 more matches

window - Archive of obsolete content
"your-lname" value="enter last name:"/> <textbox id="your-lname" value="hernandez"/> </hbox> <hbox> <button oncommand="alert('save!')"> <description>save</description> </button> </hbox> </vbox> </radiogroup> </groupbox> </vbox> </window> attributes accelerated type: booleanset this attribute to true to allow hardware layer managers to accelerate the window.
... disablechrome type: boolean set this attribute to true to disable chrome in the window.
... disablefastfindtype: booleanput disablefastfind="true" on the root element of a xul document, which is intended to be loaded in a tab, to disable the find bar for the tab with this document.
...And 4 more matches

NPClass - Archive of obsolete content
returns true if the method exists, otherwise returns false.
...returns true if invocation succeeded or false if an error occurred.
...returns true if invocation succeeded or false if an error occurred.
...And 4 more matches

NPVariant - Archive of obsolete content
_getstringidentifier() npn_getstringidentifiers() npn_getintidentifier() npn_identifierisstring() npn_utf8fromidentifier() npn_intfromidentifier() macros plugin developers are not expected to directly manipulate or access the members of the npvariant instance, instead, the function npn_releasevariantvalue(), and the following macros are provided: npvariant_is_void() evaluates to true if v is of type npvarianttype_void.
... npvariant_is_null() evaluates to true if v is of type npvarianttype_null.
... npvariant_is_boolean() evaluates to true if v is of type npvarianttype_bool.
...And 4 more matches

XForms Input Element - Archive of obsolete content
analogous widgets are <xhtml:input type="text"/> and <xul:textbox/> specific handling of attributes incremental - if "true", the bound instance node will be updated on each character typed by the user.
... checkbox most often used when the form author only needs a simple 'true', 'false', '1', or '0' response from the user (xhtml/xul).
... specific handling of attributes incremental - if "true" or this attribute is omitted from this element, then the instance node will be updated when the user checks or un-checks the checkbox.
...And 4 more matches

Using the Right Markup to Invoke Plugins - Archive of obsolete content
an example of this kind of usage for ie: <!-- ie only code --> <object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=5,0,0,0" width="366" height="142" id="myflash"> <param name="movie" value="javascript-to-flash.swf" /> <param name="quality" value="high" /> <param name="swliveconnect" value="true" /> </object> in the above example, the classid attribute that goes along with the object element points to a "clsid:" urn followed by the unique identifier of an activex control (in the above example, the string beginning with "d27...").
...here is an example of this usage, once again for the macromedia flash plugin: <object type="application/x-shockwave-flash" data="javascript-to-flash.swf" width="366" height="142" id="myflash"> <param name="movie" value="javascript-to-flash.swf" /> <param name="quality" value="high" /> <param name="swliveconnect" value="true" /> <p>you need flash -- get the latest version from <a href= "http://www.macromedia.com/downloads/">here.</a></p> </object> in the above example, application/x-shockwave-flash is the flash mime type, and will invoke the netscape-specific flash architecture in mozilla-based browsers.
... mime type for flash: <!-- usage will not work as intended --> <object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=5,0,0,0" width="366" height="142" id="myflash"> <param name="movie" value="javascript-to-flash.swf" /> <param name="quality" value="high" /> <param name="swliveconnect" value="true" /> <object type="application/x-shockwave-flash" data="javascript-to-flash.swf" width="366" height="142" id="myflashnscp"> <param name="movie" value="javascript-to-flash.swf" /> <param name="quality" value="high" /> <param name="swliveconnect" value="true" /> <p>you need flash -- get the latest version from <a href="http://www.macromedia.com/downloads/"> here.</a></p> </...
...And 4 more matches

Desktop gamepad controls - Game development
then, if the buttons are available we loop through them; if the pressed property is set to true, then we add them to the buttonspressed array for later processing.
... next, we'll consider the gamepadbuttonpressedhandler() function: function gamepadbuttonpressedhandler(button) { var press = false; for(var i=0; i<buttonspressed.length; i++) { if(buttonspressed[i] == button) { press = true; } } return press; } the function takes a button as a parameter; in the loop it checks if the given button's number is among the currently pressed buttons available in the buttonspressed array.
... if it is, then the function returns true; false otherwise.
...And 4 more matches

Responsive images - Learn web development
screen widths) and indicates what image size would be best to choose, when certain media conditions are true — these are the hints we talked about earlier.
... a space the width of the slot the image will fill when the media condition is true (480px) note: for the slot width, you may provide an absolute length (px, em) or a length relative to the viewport (vw), but not percentages.
... you may have noticed that the last slot width has no media condition (this is the default that is chosen when none of the media conditions are true).
...And 4 more matches

A first splash into JavaScript - Learn web development
'red'; if(userguess < randomnumber) { loworhi.textcontent = 'last guess was too low!' ; } else if(userguess > randomnumber) { loworhi.textcontent = 'last guess was too high!'; } } guesscount++; guessfield.value = ''; } guesssubmit.addeventlistener('click', checkguess); function setgameover() { guessfield.disabled = true; guesssubmit.disabled = true; resetbutton = document.createelement('button'); resetbutton.textcontent = 'start new game'; document.body.append(resetbutton); resetbutton.addeventlistener('click', resetgame); } function resetgame() { guesscount = 1; const resetparas = document.queryselectorall('.resultparas p'); for(let i = 0 ; i < resetparas...
...for example, if you want to simply add a new text string to an existing one and return the result, you could do this: name += ' says hello!'; this is equivalent to name = name + ' says hello!'; when we are running true/false tests (for example inside conditionals — see below) we use comparison operators.
... for example: operator name example === strict equality (is it exactly the same?) 5 === 2 + 4 // false 'chris' === 'bob' // false 5 === 2 + 3 // true 2 === '2' // false; number versus string !== non-equality (is it not the same?) 5 !== 2 + 4 // true 'chris' !== 'bob' // true 5 !== 2 + 3 // false 2 !== '2' // true; number versus string < less than 6 < 10 // true 20 < 10 // false > greater than 6 > 10 // false 20 > 10 // true conditionals returning to our checkguess() function, i think it's safe to say that we don't want it to just spit out a placeholder message.
...And 4 more matches

Creating our first Vue component - Learn web development
the first is a required property, which will have a value of true.
... your component object should now look like this: <script> export default { props: { label: { required: true, type: string }, done: { default: false, type: boolean } } }; </script> using registered props with these props defined inside the component object, we can now use these variable values inside our template.
... update the component object like so: export default { props: { label: { required: true, type: string }, done: { default: false, type: boolean } }, data() { return { isdone: this.done }; } }; vue does a little magic here — it binds all of your props directly to the component instance, so we don’t have to call this.props.done.
...And 4 more matches

How to implement a custom autocomplete search component
* if removefromdb is set to true, the value should be removed from * persistent storage as well.
... * if removefromdb is set to true, the value should be removed from * persistent storage as well.
...mgr.unregisterfactorylocation(class_id, alocation); }, getclassobject: function(acompmgr, acid, aiid) { if (!aiid.equals(components.interfaces.nsifactory)) throw components.results.ns_error_not_implemented; if (acid.equals(class_id)) return simpleautocompletesearchfactory; throw components.results.ns_error_no_interface; }, canunload: function(acompmgr) { return true; } }; // module initialization function nsgetmodule(acompmgr, afilespec) { return simpleautocompletesearchmodule; } starting in gecko 2.0, component registration has been changed, so you need to make the following changes: add an nsgetfactory() function: function nsgetfactory(cid) { if (cid.tostring().touppercase() != class_id.tostring().touppercase()) { throw compone...
...And 4 more matches

Addon
n, in string platformversion) overview of optional methods void uninstall() void canceluninstall() boolean hasresource(in string path) nsiuri getresourceuri(in string path) void getdatadirectory(in datadirectorycallback callback) required properties attribute type description appdisabled read only boolean true if this add-on cannot be used in the application based on version compatibility, dependencies, and blocklisting.
... foreigninstall read only boolean true or false depending on whether the add-on is a third party add-on installation or not.
... isactive read only boolean true if the add-on is currently functional.
...And 4 more matches

AsyncTestUtils extended framework
a function should yield true or return true when the asynchronous driver should continue executing without stopping.
... a function that does not return anything (or returns undefined) and is not a generator is treated like a function that returned true.
... manipulating messages setread(aberead) setread(true) marks all the messages in the set as read, setread(false) marks them as unread.
...And 4 more matches

Gecko object attributes
applied to: listitem, option exposed in aria: aria-setsize live region attribues atomic true when the entire region should be presented as a whole, when changes within it are considered important enough to automatically present.
... common widget attributes checkable true when the widget is known to behave like a checkbox.
... applied to: any widget that accepts input exposed via aria: aria-datatype exposed in xforms: from boud instance node datatype draggable true when the accessible object can be grabbed.
...And 4 more matches

Index
24 components.issuccesscode xpcom, xpcom:language bindings, xpconnect determines whether a given xpcom return code (that is, an nsresult value) indicates the success or failure of an operation, returning true or false respectively.
... 141 ns ensure success xpcom, xpcom_macros macro 142 ns ensure true xpcom, xpcom_macros macro 143 ns_abort_if_false this was removed in bug 1127201 144 ns_addref xpcom, xpcom_macros macro 145 ns_assertion xpcom, xpcom_macros macro 146 ns_ensure_arg_pointer xpcom, xpcom_macros macro 147 ns_error xpcom, xpcom_macros throws a assertion (ns_assertion) w...
...|true| if this context should be allowed to run scripts, |false| otherwise.
...And 4 more matches

Components.utils.Sandbox
this parameter is an object with the following optional properties: freshzone if true creates a new gc region separate from both the calling context's and the sandbox prototype's region.
... passing a content window object, setting wantxrays:true (default) and using an extended principal provides a clean, isolated execution environment in which javascript code that needs web apis (such as accessing the window's dom) can be executed without interference from untrusted content code.
...default: true.
...And 4 more matches

nsIEditorSpellCheck
return value returns true if spell checking can be enabled.
...in spite of the name, this function checks the word you give it, returning true if the word is misspelled.
...boolean checkcurrentword( in wstring suggestedword ); parameters suggestedword missing description return value true if the specified word is misspelled; otherwise false.
...And 4 more matches

nsIMessenger
aasfile if true a file picker is spawned with the option save the message as html, text, or eml.
...if set to true the attachment is opened inside the message pane which in turn should trigger the helper app dialog.
...if set to true the attachment is opened inside the message pane which in turn should trigger the helper app dialog.
...And 4 more matches

nsINavHistoryService
nsinavhistoryobserver observer); void runinbatchmode(in nsinavhistorybatchcallback acallback, in nsisupports aclosure); void importhistory(in nsifile file); astring getcharsetforuri(in nsiuri auri); astring setcharsetforuri(in nsiuri auri, in astring acharset); attributes attribute type description hashistoryentries boolean true if there is any history.
... historydisabled boolean true if history is disabled.
...this is true of all images on a page, and the contents of the iframe.
...And 4 more matches

nsIParentalControlsService
in boolean aflag, in nsiuri asource, [optional] in nsifile atarget); boolean requesturioverride(in nsiuri atarget, [optional] in nsiinterfacerequestor awindowcontext); boolean requesturioverrides(in nsiarray atargets, [optional] in nsiinterfacerequestor awindowcontext); attributes attribute type description blockfiledownloadsenabled boolean true if the current user account's parental controls restrictions include the blocking of all file downloads.
... loggingenabled boolean true if the current user account has parental controls logging enabled.
... if this is true, applications should log relevant events using log() method.
...And 4 more matches

nsIZipWriter
inqueue boolean true if operations are being performed in the background queue, or false if background operations are not in progress.
... aqueue if true, the operation is queued for later execution.
... aqueue if true, the operation is queued for later execution.
...And 4 more matches

nsIAbCard/Thunderbird3
ismaillist boolean if ismaillist is true then maillisturi will contain the uri of the associated mail list.
... maillisturi string if ismaillist is true then maillisturi will contain the uri of the associated mail list.
...of particular note is that boolean variables are converted to integers as in c/c++ (true is a non-zero value), so that false will be converted to a string of 0 and not false<code>.
...And 4 more matches

Address Book examples
this is currently true in the case of ldap, but may be true in other cases as well.
... formulate a boolean search string (see nsiabcard for built-in property names): var searchquery = "(or(primaryemail,bw,@v)(nickname,bw,@v)(and(ismaillist,=,true)(notes,bw,@v)))"; searchquery = searchquery.replace(/@v/g, encodeuricomponent("mystr") the search queries use lisp syntax with operators enumerated in nsabquerystringtoexpression.cpp.
... adding a mailing list first create a mailing list object and initialize it: var maillist = components.classes["@mozilla.org/addressbook/directoryproperty;1"] .createinstance(components.interfaces.nsiabdirectory); maillist.ismaillist = true; now fill in the details you want to store: maillist.dirname = "my mailing list"; maillist.listnickname = "nickname for list"; maillist.description = "list description"; add the cards you want to include in the list: for (let i = 0; i < numcards; i++) maillist.addresslists.appendelement(card[i], false); now save the list: var parentdirectory = ...; // an nsiabdirectory for the parent o...
...And 4 more matches

Using the CSS Painting API - Web APIs
registerpaint('headerhighlight', class { /* define if alphatransparency is allowed alpha is set to true by default.
... if set to false, all colours used on the canvas will be fully opaque */ static get contextoptions() { return { alpha: true }; } /* ctx is the 2d drawing context a subset of the html5 canvas api.
... the code to do this looks like so: registerpaint('headerhighlight', class { static get contextoptions() { return { alpha: true }; } /* ctx is the 2d drawing context size is the paintsize, the dimensions (height and width) of the box being painted */ paint(ctx, size) { ctx.fillstyle = 'hsla(55, 90%, 60%, 1.0)'; ctx.fillrect( 0, size.height / 3, size.width * 0.4, size.height * 0.6 ); } }); this code example has two differences from our first example: we've included a seco...
...And 4 more matches

Advanced animations - Web APIs
var canvas = document.getelementbyid('canvas'); var ctx = canvas.getcontext('2d'); var ball = { x: 100, y: 100, radius: 25, color: 'blue', draw: function() { ctx.beginpath(); ctx.arc(this.x, this.y, this.radius, 0, math.pi * 2, true); ctx.closepath(); ctx.fillstyle = this.color; ctx.fill(); } }; ball.draw(); nothing special here, the ball is actually a simple circle and gets drawn with the help of the arc() method.
... var canvas = document.getelementbyid('canvas'); var ctx = canvas.getcontext('2d'); var raf; var ball = { x: 100, y: 100, vx: 5, vy: 2, radius: 25, color: 'blue', draw: function() { ctx.beginpath(); ctx.arc(this.x, this.y, this.radius, 0, math.pi * 2, true); ctx.closepath(); ctx.fillstyle = this.color; ctx.fill(); } }; function draw() { ctx.clearrect(0,0, canvas.width, canvas.height); ball.draw(); ball.x += ball.vx; ball.y += ball.vy; raf = window.requestanimationframe(draw); } canvas.addeventlistener('mouseover', function(e) { raf = window.requestanimationframe(draw); }); canvas.addeventlistener('mouseout', function(e)...
... <canvas id="canvas" style="border: 1px solid" width="600" height="300"></canvas> var canvas = document.getelementbyid('canvas'); var ctx = canvas.getcontext('2d'); var raf; var ball = { x: 100, y: 100, vx: 5, vy: 2, radius: 25, color: 'blue', draw: function() { ctx.beginpath(); ctx.arc(this.x, this.y, this.radius, 0, math.pi * 2, true); ctx.closepath(); ctx.fillstyle = this.color; ctx.fill(); } }; function draw() { ctx.clearrect(0,0, canvas.width, canvas.height); ball.draw(); ball.x += ball.vx; ball.y += ball.vy; if (ball.y + ball.vy > canvas.height || ball.y + ball.vy < 0) { ball.vy = -ball.vy; } if (ball.x + ball.vx > canvas.width || ball.x + ball.vx < 0) { ball.vx = -ball.vx...
...And 4 more matches

FileSystemDirectoryEntry.getDirectory() - Web APIs
fileerror.path_exists_err the create and exclusive options were both true, indicating that the directory should be created but must not already exist, but the directory does in fact already exist.
... create optional if this property is true, and the requested file or directory doesn't exist, the user agent should create it.
... exclusive optional if true, and the create option is also true, the file must not exist prior to issuing the call.
...And 4 more matches

FileSystemDirectoryEntry.getFile() - Web APIs
fileerror.path_exists_err the create and exclusive options were both true, indicating that the file should be created but must not already exist, but the file does in fact already exist.
... create optional if this property is true, and the requested file or directory doesn't exist, the user agent should create it.
... exclusive optional if true, and the create option is also true, the file must not exist prior to issuing the call.
...And 4 more matches

FileSystemFlags - Web APIs
methods which accept an options parameter of this type may specify zero or more of these flags as fields in an object, like this: datadirectoryentry.getdirectory("workspace", { create: true }, function(entry) { }); here, we see that the create property is provided, with a value of true, indicating that the directory should be created if it's not already there.
... properties create optional if this property is true, and the requested file or directory doesn't exist, the user agent should create it.
... exclusive optional if true, and the create option is also true, the file must not exist prior to issuing the call.
...And 4 more matches

Drag Operations - Web APIs
to make other html elements draggable, three things must be done: set the draggable="true" on the element that you wish to make draggable.
... <p draggable="true" ondragstart="event.datatransfer.setdata('text/plain', 'this text may be dragged')"> this text <strong>may</strong> be dragged.
... </p> the draggable attribute is set to "true", so this element becomes draggable.
...And 4 more matches

KeyboardEvent.getModifierState() - Web APIs
the keyboardevent.getmodifierstate() method returns the current state of the specified modifier key: true if the modifier is active (that is the modifier key is pressed or locked), otherwise, false.
... modifier keys on gecko when getmodifierstate() returns true on gecko?
...event.getmodifierstate("accel") returns true when at least one of keyboardevent.ctrlkey or keyboardevent.metakey is true.
...And 4 more matches

KeyboardEvent - Web APIs
keyboardevent.altkey read only returns a boolean that is true if the alt ( option or ⌥ on os x) key was active when the key event was generated.
... keyboardevent.ctrlkey read only returns a boolean that is true if the ctrl key was active when the key event was generated.
... keyboardevent.iscomposing read only returns a boolean that is true if the event is fired between after compositionstart and before compositionend.
...And 4 more matches

Establishing a connection: The WebRTC perfect negotiation pattern - Web APIs
const constraints = { audio: true, video: true }; const config = { iceservers: [{ urls: "stun:stun.mystunserver.tld" }] }; const selfvideo = document.queryselector("video.selfview"); const remotevideo = document.queryselector("video.remoteview"); const signaler = new signalingchannel(); const pc = new rtcpeerconnection(config); this code also gets the <video> elements using the classes "selfview" and "remoteview"; these wil...
... the perfect negotiation logic now we get into the true perfect negotiation logic, which functions entirely independently from the rest of the application.
... let makingoffer = false; pc.onnegotiationneeded = async () => { try { makingoffer = true; await pc.setlocaldescription(); signaler.send({ description: pc.localdescription }); } catch(err) { console.error(err); } finally { makingoffer = false; } }; note that setlocaldescription() without arguments automatically creates and sets the appropriate description based on the current signalingstate.
...And 4 more matches

XRWebGLLayer() - Web APIs
the options available are: alpha optional the frame buffer's color buffer will be established with an alpha channel if the alpha boolean property is true.
...the default value is true.
... antialias optional a boolean value which is true if anti-aliasing is to be used when rendering in the context; otherwise false.
...And 4 more matches

Border-radius generator - CSS: Cascading Style Sheets
ction inputslidermanager() { var subscribers = {}; var sliders = []; var inputcomponent = function inputcomponent(obj) { var input = document.createelement('input'); input.setattribute('type', 'text'); input.addeventlistener('click', function(e) { this.select(); }); input.addeventlistener('change', function(e) { var value = parseint(e.target.value); if (isnan(value) === true) setvalue(obj.topic, obj.value); else setvalue(obj.topic, value); }); subscribe(obj.topic, function(value) { input.value = value + obj.unit; }); return input; } var slidercomponent = function slidercomponent(obj, sign) { var slider = document.createelement('div'); var startx = null; var start_value = 0; slider.addeventlistener("click", function(e) { setvalue...
...unsubscribe } })(); /** * ui-buttonmanager */ var buttonmanager = (function checkboxmanager() { var subscribers = []; var buttons = []; var checkbox = function checkbox(node) { var topic = node.getattribute('data-topic'); var state = node.getattribute('data-state'); var name = node.getattribute('data-label'); var align = node.getattribute('data-text-on'); state = (state === "true"); var checkbox = document.createelement("input"); var label = document.createelement("label"); var id = 'checkbox-' + topic; checkbox.id = id; checkbox.setattribute('type', 'checkbox'); checkbox.checked = state; label.setattribute('for', id); if (name) { label.classname = 'text'; if (align) label.classname += ' ' + align; label.textcontent = name; } node.appe...
...var previewmousetracking = (function drag() { var active = false; var lastx = 0; var lasty = 0; var subscribers = []; var init = function init(id) { var elem = getelembyid(id); elem.addeventlistener('mousedown', dragstart, false); document.addeventlistener('mouseup', dragend, false); } var dragstart = function dragstart(e) { if (e.button !== 0) return; active = true; lastx = e.clientx; lasty = e.clienty; document.addeventlistener('mousemove', mousedrag, false); } var dragend = function dragend(e) { if (e.button !== 0) return; if (active === true) { active = false; document.removeeventlistener('mousemove', mousedrag, false); } } var mousedrag = function mousedrag(e) { notify(e.clientx - lastx, e.clienty - lasty); ...
...And 4 more matches

Rich-Text Editing in Mozilla - Developer guides
similarly, setting contenteditable to "true" allows you to make individual elements of a document editable.
...for it to work in internet explorer, the contenteditable attribute of the body tag needs to be set to "true".
... figure 2 : first example html: <body contenteditable="true" onload="load()"> javascript: function load(){ window.document.designmode = "on"; } example 2 the second example is a simple rich text editing page, where text can be bolded/italicized/underlined, new links can be added and the color of text changed.
...And 4 more matches

Cross-Origin Resource Sharing (CORS) - HTTP
web fonts (for cross-domain font usage in @font-face within css), so that servers can deploy truetype fonts that can only be cross-site loaded and used by web sites that are permitted to do so.
...content on foo.example might contain javascript like this: const invocation = new xmlhttprequest(); const url = 'http://bar.other/resources/credentialed-content/'; function callotherdomain() { if (invocation) { invocation.open('get', url, true); invocation.withcredentials = true; invocation.onreadystatechange = handler; invocation.send(); } } line 7 shows the flag on xmlhttprequest that has to be set in order to make the invocation with cookies, namely the withcredentials boolean value.
...since this is a simple get request, it is not preflighted, but the browser will reject any response that does not have the access-control-allow-credentials: true header, and not make the response available to the invoking web content.
...And 4 more matches

A re-introduction to JavaScript (JS tutorial) - JavaScript
t values to numbers: + '42'; // 42 + '010'; // 10 + '0x10'; // 16 a special value called nan (short for "not a number") is returned if the string is non-numeric: parseint('hello', 10); // nan nan is toxic: if you provide it as an operand to any mathematical operation, the result will also be nan: nan + 5; // nan you can test for nan using the built-in isnan() function: isnan(nan); // true javascript also has the special values infinity and -infinity: 1 / 0; // infinity -1 / 0; // -infinity you can test for infinity, -infinity and nan values using the built-in isfinite() function: isfinite(1 / 0); // false isfinite(-infinity); // false isfinite(nan); // false the parseint() and parsefloat() functions parse a string until they reach a character that isn't valid for the spe...
... javascript has a boolean type, with possible values true and false (both of which are keywords.) any value can be converted to a boolean according to the following rules: false, 0, empty strings (""), nan, null, and undefined all become false.
... all other values become true.
...And 4 more matches

Grammar and types - JavaScript
in the following code, the variable input is not assigned a value, and the if statement evaluates to true.
... if (true) { var x = 5; } console.log(x); // x is 5 this behavior changes when using the let declaration (introduced in ecmascript 2015).
... if (true) { let y = 5; } console.log(y); // referenceerror: y is not defined variable hoisting another unusual thing about variables in javascript is that you can refer to a variable declared later, without getting an exception.
...And 4 more matches

Array.prototype.some() - JavaScript
return value true if the callback function returns a truthy value for at least one element in the array.
... description the some() method executes the callback function once for each element present in the array until it finds the one where callback returns a truthy value (a value that becomes true when converted to a boolean).
... if such an element is found, some() immediately returns true.
...And 4 more matches

Object.isSealed() - JavaScript
description returns true if the object is sealed, otherwise false.
...object.preventextensions(empty); object.issealed(empty); // === true // the same is not true of a non-empty object, // unless its properties are all non-configurable.
...object.defineproperty(hasprop, 'fee', { configurable: false }); object.issealed(hasprop); // === true // the easiest way to seal an object, of course, // is object.seal.
...And 4 more matches

Comparing Reflect and Object methods - JavaScript
reflect.defineproperty() returns true if the property was defined on the object and false if it was not.
... n/a set() n/a reflect.set() returns true if the property was set successfully on the object and false if it was not.
... deleteproperty() n/a reflect.deleteproperty() returns true if the property was deleted from the object and false if it was not.
...And 4 more matches

instanceof - JavaScript
// defining constructors function c() {} function d() {} let o = new c() // true, because: object.getprototypeof(o) === c.prototype o instanceof c // false, because d.prototype is nowhere in o's prototype chain o instanceof d o instanceof object // true, because: c.prototype instanceof object // true c.prototype = {} let o2 = new c() o2 instanceof c // true // false, because c.prototype is nowhere in // o's prototype chain anymore o instanceof c d.prototype =...
... new c() // add c to [[prototype]] linkage of d let o3 = new d() o3 instanceof d // true o3 instanceof c // true since c.prototype is now in o3's prototype chain note that the value of an instanceof test can change based on changes to the prototype property of constructors.
...components.interfaces.nsifile) calls obj.queryinterface(xpcominterface) and returns true if queryinterface succeeded.
...And 4 more matches

Index - XPath
18 boolean xslt, xslt_reference the boolean function evaluates an expression and returns true or false.
... 22 contains xslt, xslt_reference the contains function determines whether the first argument string contains the second argument string and returns boolean true or false.
... 26 element-available xslt, xslt_reference the element-available function determines if an element is available and returns true or false.
...And 4 more matches

tabs - Archive of obsolete content
tabs.open({ url: "http://www.mysite.com", innewwindow: true }); // open a new tab on active window in the background.
... tabs.open({ url: "http://www.mysite.com", inbackground: true }); // open a new tab as an app tab and do something once it's open.
... tabs.open({ url: "http://www.mysite.com", ispinned: true, onopen: function onopen(tab) { // do stuff like listen for content // loading.
...And 3 more matches

core/heritage - Archive of obsolete content
also, idiomatic sdk code does not uses optional new keywords, but you're free to use it in your add-on code: var fluffy = dog('fluffy'); // instatiation fluffy instanceof dog // => true fluffy instanceof class // => true as you could notice from example above classes created via class function by default inherits from a class itself.
...this.bark() : ''; } }); var tsuga = pet('labrador', 'tsuga'); tsuga instanceof pet // => true tsuga instanceof dog // => true tsuga.call('tsuga') // => 'ruff!
...ruff!' leo.instanceof labrador // => true leo.instanceof dog // => true also, you could use class function to subclass constructor functions that were not created by a class itself: var foo = class({ extends: labrador // ...
...And 3 more matches

Appendix C: Avoiding using eval in Add-ons - Archive of obsolete content
moreover, code using eval is harder to parse for a human mind, is often pretty complex, and relies on assumptions that are not necessarily true in the future or even now.
...settimeout("dosomething();", 100); addeventlistener("load", "myaddon.init(); myaddon.onload();", true); setinterval(am_i_a_string_or_function_reference_qmark, 100); that in itself is certainly not elegant, but it may also become a security issue if you pass code that was externally retrieved (or at least contains bits of externally retrieved data): // do not use!
... addeventlistener("load", function() { myaddon.init(); myaddon.onload(); }, true); function doxhr() { //...
...And 3 more matches

Migrate apps from Internet Explorer to Mozilla - Archive of obsolete content
conditionistrue : conditionisfalse; for example, to retrieve an element, you would use: function getelement(aid){ return (document.getelementbyid) ?
...if adeep is true, it copies over the node's entire subtree.
...internet explorer is always in quirks mode, as it does not support true xhtml.
...And 3 more matches

Supporting private browsing mode - Archive of obsolete content
var pbs = components.classes["@mozilla.org/privatebrowsing;1"] .getservice(components.interfaces.nsiprivatebrowsingservice); var oldprivatemode = pbs.privatebrowsingmode; pbs.privatebrowsingenabled = true; /* this is all private */ pbs.privatebrowsingenabled = oldprivatemode; in this example, we save the current state of the private browsing mode setting in the oldprivatemode variable, then turn on private browsing by setting its value to true.
...function privatebrowsinglistener() { this.init(); } privatebrowsinglistener.prototype = { _os: null, _inprivatebrowsing: false, // whether we are in private browsing mode _watcher: null, // the watcher object init : function () { this._inited = true; this._os = components.classes["@mozilla.org/observer-service;1"] .getservice(components.interfaces.nsiobserverservice); this._os.addobserver(this, "private-browsing", false); this._os.addobserver(this, "quit-application", false); try { var pbs = components.classes["@mozilla.org/privatebrowsing;1"] .getservice(components.int...
...erfaces.nsiprivatebrowsingservice); this._inprivatebrowsing = pbs.privatebrowsingenabled; } catch(ex) { // ignore exceptions in older versions of firefox } }, observe : function (asubject, atopic, adata) { if (atopic == "private-browsing") { if (adata == "enter") { this._inprivatebrowsing = true; if (this.watcher && "onenterprivatebrowsing" in this._watcher) { this.watcher.onenterprivatebrowsing(); } } else if (adata == "exit") { this._inprivatebrowsing = false; if (this.watcher && "onexitprivatebrowsing" in this._watcher) { this.watcher.onexitprivatebrowsing(); } } } else if (atopic == "quit-application") { this._os.removeobserver(this, "quit-app...
...And 3 more matches

Panels - Archive of obsolete content
to do this, set the noautohide attribute on the panel to true.
... <panel id="search-panel" noautohide="true"> <textbox id="search"/> <button label="search" oncommand="dosearch();"/> <button label="cancel" oncommand="this.parentnode.hidepopup();"/> </panel> because the panel can no longer be closed by clicking elsewhere, the panel should always provide a means to close the panel itself.
...for instance, to have the textbox initially focused in the example above: <panel id="search-panel" onpopupshown="document.getelementbyid('search').focus()"> to disable the adjusting of focus when a panel is opened, set the noautofocus attribute to true: <panel noautofocus="true"> this will cause the focus to remain on the element within the main window that has focus when the panel is opened.
...And 3 more matches

Special Condition Tests - Archive of obsolete content
the iscontainer attribute should be set to true if you only want to match containers, and false if you only want to match non-containers.
...<button label="houses in my neighbourhood" type="menu" datasources="template-guide-streets.rdf" ref="http://www.xulplanet.com/rdf/myneighbourhood"> <template> <rule iscontainer="true"> <menupopup> <menu uri="rdf:*" label="rdf:http://purl.org/dc/elements/1.1/title"/> </menupopup> </rule> <rule> <menupopup> <menuitem uri="rdf:*" label="rdf:http://www.xulplanet.com/rdf/address"/> </menupopup> </rule> </template> </button> the only difference in the code in this example is that the order of the rules has been switched around,...
...since the iscontainer attribute is set to true, the rule will match as long as the member value or child of the starting node is an rdf container.
...And 3 more matches

Tree Widget Changes - Archive of obsolete content
it should return true if a drop is allowed on a row.
... <treecol type="checkbox"> you can then set or clear the checkbox for a particular cell in that column by setting the value attribute to true, or leaving out the attribute.
... <treecell/> <treecell value="true"/> you need to specify the checkbox image with css for the checkbox to display.
...And 3 more matches

Commands - Archive of obsolete content
example: toggling command disabled example 2 : source view <command id="cmd_openhelp" oncommand="alert('help');"/> <button label="help" command="cmd_openhelp"/> <button label="more help" command="cmd_openhelp"/> <button label="disable" oncommand="document.getelementbyid('cmd_openhelp').setattribute('disabled','true');"/> <button label="enable" oncommand="document.getelementbyid('cmd_openhelp').removeattribute('disabled');"/> in this example, both buttons use the same command.
...a controller is expected to implement four methods, which are listed below: supportscommand (command) this method should return true if the controller supports a command.
... iscommandenabled (command) this method should return true if the command is enabled, or false if it is disabled.
...And 3 more matches

Modifying a XUL Interface - Archive of obsolete content
if true, all of the children are copied as well.
... this is done recursively, so for large tree structures make sure that this is desired before passing true to the clonenode() function.
... here is an example: example 2 : source view <hbox height="400"> <button label="copy" oncommand="this.parentnode.appendchild(this.nextsibling.clonenode(true));"/> <vbox> <button label="first"/> <button label="second"/> </vbox> </hbox> when the copy button is pressed..
...And 3 more matches

listbox - Archive of obsolete content
iblerow, getindexofitem, getitematindex, getnumberofvisiblerows, getrowcount, getselecteditem, insertitemat, invertselection, movebyoffset, removeitemat, removeitemfromselection, scrolltoindex, selectall, selectitem, selectitemrange, timedselect, toggleitemselection examples <listbox id="thelist"> <listitem label="ruby"/> <listitem label="emerald"/> <listitem label="sapphire" selected="true"/> <listitem label="diamond"/> </listbox> <listbox id="thelist" rows="10" width="400"> <listhead> <listheader label="1ct gem" width="240"/> <listheader label="price" width="150"/> </listhead> <listcols> <listcol/> <listcol flex="1"/> </listcols> </listbox> var thelist = document.getelementbyid('thelist'); gems = [ {gem: "ruby", price: "$3,500 - $4,600"}, ...
...do not set the attribute to true, as this will suggest you can set it to false to enable the element again, which is not the case.
...this feature may be disabled by setting this attribute to true.
...And 3 more matches

menu - Archive of obsolete content
allowevents type: boolean if true, events are passed to children of the element.
...do not set the attribute to true, as this will suggest you can set it to false to enable the element again, which is not the case.
... open type: boolean for the menu type buttons, the open attribute is set to true when the menu is open.
...And 3 more matches

menuitem - Archive of obsolete content
allowevents type: boolean if true, events are passed to children of the element.
... autocheck type: boolean if this attribute is true or left out, the checked state of the button will be switched each time the button is pressed.
...when autocheck is true, the button type should be "checkbox" or "radio".
...And 3 more matches

tooltip - Archive of obsolete content
for example, for a menuitem in a menu you can add the following css rule when you want to use the value none: menupopup > menuitem, menupopup > menu { max-width: none; } default type: boolean if true, the tooltip is used as the default popup for displaying tooltips in the window.
...if this attribute is set to true, this will not happen and the tooltip will only hide when the user moves the mouse to another element.
... page type: boolean setting the page attribute to true will result in the tooltip being filled automatically as appropriate for a browser content area tooltip, i.e.
...And 3 more matches

The global XML object - Archive of obsolete content
the following example defines the foocount() method, which returns the amount of <foo> elements in the xml: xml.prototype.function::foocount = function foocount() { return this..foo.length(); }; <foobar><foo/><foo/><foo/></foobar>.foocount() // returns 3 ignorecomments true by default.
...this means that if ignorecomments is true, the list returned by .comments() will be empty.
...-> <bar/> </foo>; element.comments().length(); // returns 0 element.toxmlstring(); // returns <foo><bar/></foo> xml.ignorecomments = false; element = <foo> <!-- my comment --> <bar/> </foo>; element.comments().length(); // returns 1 element.toxmlstring(); // returns <foo><!-- my comment --><bar/></foo> ignoreprocessinginstructions true by default.
...And 3 more matches

Old Proxy API - Archive of obsolete content
ng the value") receiver.name = val (if receiver inherits from a proxy and does not override name) set: function(receiver, name, val) -> boolean function(receiver, name, val) { var desc = this.getownpropertydescriptor(name); if (desc) { if ('writable' in desc) { if (desc.writable) { desc.value = val; this.defineproperty(name, desc); return true; } else { return false; } } else { // accessor if (desc.set) { desc.set.call(receiver, val); return true; } else { return false; } } } desc = this.getpropertydescriptor(name); if (desc) { if ('writable' in desc) { if (desc.writable) { // fall through } else { return false; } } els...
...e { // accessor if (desc.set) { desc.set.call(receiver, val); return true; } else { return false; } } } this.defineproperty(name, { value: val, writable: true, enumerable: true, configurable: true}); return true; } receiver is either the proxy or an object that inherits from the proxy.
... typeof typeof anobjectproxy === "object" typeof afunctionproxy === "function" instanceof anobjectproxy instanceof c === true if and only if the prototype with which anobjectproxy was initialized equals or inherits from c.prototype afunctionproxy instanceof function === true common mistakes and misunderstanding when starting using proxies, there are often a few beginners' mistakes and misunderstandings: not implementing all traps.
...And 3 more matches

Implementing controls using the Gamepad API - Game development
both functions are fairly simple: connect: function(evt) { gamepadapi.controller = evt.gamepad; gamepadapi.turbo = true; console.log('gamepad connected.'); }, the connect() function takes the event as a parameter and assigns the gamepad object to the gamepadapi.controller variable.
...we then set the turbo property to true.
... connected: a boolean variable, true if the device is connected.
...And 3 more matches

2D maze game with device orientation - Game development
ball = { _width: 320, _height: 480 }; ball.boot = function(game) {}; ball.boot.prototype = { preload: function() { this.load.image('preloaderbg', 'img/loading-bg.png'); this.load.image('preloaderbar', 'img/loading-bar.png'); }, create: function() { this.game.scale.scalemode = phaser.scalemanager.show_all; this.game.scale.pagealignhorizontally = true; this.game.scale.pagealignvertically = true; this.game.state.start('preloader'); } }; the main ball object is defined and we're adding two variables called _width and _height that are the width and the height of the game canvas — they will help us position the elements on the screen.
...pe = { create: function() { this.add.sprite(0, 0, 'screen-mainmenu'); this.gametitle = this.add.sprite(ball._width*0.5, 40, 'title'); this.gametitle.anchor.set(0.5,0); this.startbutton = this.add.button(ball._width*0.5, 200, 'button-start', this.startgame, this, 2, 0, 1); this.startbutton.anchor.set(0.5,0); this.startbutton.input.usehandcursor = true; }, startgame: function() { this.game.state.start('howto'); } }; to create a new button there's add.button method with the following list of optional arguments: top absolute position on canvas in pixels.
...here’s the code from the create() function responsible for this: window.addeventlistener("deviceorientation", this.handleorientation, true); we’re adding an event listener to the "deviceorientation" event and binding the handleorientation function which looks like this: handleorientation: function(e) { var x = e.gamma; var y = e.beta; ball._player.body.velocity.x += x; ball._player.body.velocity.y += y; }, the more you tilt the device, the more force is applied to the ball, therefore the faster it moves (the vel...
...And 3 more matches

Client-side storage - Learn web development
if it has been stored, this call will evaluate to true; if not, it will be false.
... if it is true, we display a personalized greeting, display the "forget" part of the form, and hide the "say hello" part of the form.
...evious handler: // setup the database tables if this has not already been done request.onupgradeneeded = function(e) { // grab a reference to the opened database let db = e.target.result; // create an objectstore to store our notes in (basically like a single table) // including a auto-incrementing key let objectstore = db.createobjectstore('notes_os', { keypath: 'id', autoincrement:true }); // define what data items the objectstore will contain objectstore.createindex('title', 'title', { unique: false }); objectstore.createindex('body', 'body', { unique: false }); console.log('database setup complete'); }; this is where we define the schema (structure) of our database; that is, the set of columns (or fields) it contains.
...And 3 more matches

Componentizing our React app - Learn web development
go back to src/app.js, copy the first <li> from inside the unordered list, and paste it into todo.js so that it reads like this: export default function todo() { return ( <li classname="todo stack-small"> <div classname="c-cb"> <input id="todo-0" type="checkbox" defaultchecked={true} /> <label classname="todo-label" htmlfor="todo-0"> eat </label> </div> <div classname="btn-group"> <button type="button" classname="btn"> edit <span classname="visually-hidden">eat</span> </button> <button type="button" classname="btn btn__danger"> delete <span classname="visually-hidden">eat</span> </butto...
... putting all that together, your todo() function should read like this: export default function todo(props) { return ( <li classname="todo stack-small"> <div classname="c-cb"> <input id="todo-0" type="checkbox" defaultchecked={true} /> <label classname="todo-label" htmlfor="todo-0"> {props.name} </label> </div> <div classname="btn-group"> <button type="button" classname="btn"> edit <span classname="visually-hidden">{props.name}</span> </button> <button type="button" classname="btn btn__danger"> delete <span classname="visually-hidden">{props.n...
...the first (eat) should have a value of true; the rest should be false: <todo name="eat" completed={true} /> <todo name="sleep" completed={false} /> <todo name="repeat" completed={false} /> as before, we must go back to todo.js to actually use these props.
...And 3 more matches

React interactivity: Editing, filtering, conditional rendering - Learn web development
to see the editing template, you will have to change the default isediting state from false to true in your code for now; we will look at making the edit button toggle this in the next section!
...to start with, we want to call setediting() with a value of true when a user presses the "edit" button in our viewtemplate, so that we can switch templates.
... update the "edit" button in the viewtemplate like so: <button type="button" classname="btn" onclick={() => setediting(true)}> edit <span classname="visually-hidden">{props.name}</span> </button> now we'll add the same onclick handler to the "cancel" button in the editingtemplate, but this time we'll set isediting to false so that it switches us back to the view template.
...And 3 more matches

mozbrowserselectionstatechanged
its properties are: canselectall: a boolean indicating whether the select all command can be issued (true) or not (false).
... cancut: a boolean indicating whether the cut command can be issued (true) or not (false).
... cancopy: a boolean indicating whether the copy command can be issued (true) or not (false).
...And 3 more matches

Midas
contentreadonly this command will make the editor readonly(true)or editable(false).
... insertbronreturn true/false selects whether pressing return inside a paragraph creates another paragraph or just inserts a <br> tag.
...by default (at least today), this is true.
...And 3 more matches

NSS Sample Code Sample1
runtime keys as loaded from the files pk11symkey *menckey; pk11symkey *mmackey; }; server::server(const char *servername) : mservername(0), mwrappedenckey(0), mwrappedmackey(0), menckey(0), mmackey(0) { // copy the server name mservername = pl_strdup(servername); } server::~server() { if (mservername) pl_strfree(mservername); if (mwrappedenckey) secitem_freeitem(mwrappedenckey, pr_true); if (mwrappedmackey) secitem_freeitem(mwrappedmackey, pr_true); if (menckey) pk11_freesymkey(menckey); if (mmackey) pk11_freesymkey(mmackey); } int server::init() { int rv = 0; seckeyprivatekey *prvkey = 0; seckeypublickey *pubkey = 0; pk11slotinfo *slot = 0; pk11rsagenparams rsaparams; secstatus s; // see if there is already a private key with this name.
... rv = getprivatekey(&prvkey); if (rv == 0 && prvkey) goto done; rv = 0; // these could be parameters to the init function rsaparams.keysizeinbits = 1024; rsaparams.pe = 65537; slot = pk11_getinternalkeyslot(); if (!slot) { rv = 1; goto done; } prvkey = pk11_generatekeypair(slot, ckm_rsa_pkcs_key_pair_gen, &rsaparams, &pubkey, pr_true, pr_true, 0); if (!prvkey) { rv = 1; goto done; } // set the nickname on the private key so that it // can be found later.
...done; } pubkey = seckey_extractpublickey(keyinfo); if (!pubkey) { rv = 1; goto done; } // export the encryption key rv = wrapkey(menckey, pubkey, &data); if (rv) goto done; // export the mac key rv = wrapkey(mmackey, pubkey, wrappedmackey); if (rv) goto done; // commit the rest of the operation *wrappedenckey = data; data = 0; done: if (data) secitem_freeitem(data, pr_true); if (pubkey) seckey_destroypublickey(pubkey); if (keyinfo) seckey_destroysubjectpublickeyinfo(keyinfo); return rv; } int server::importkeys(secitem *wrappedenckey, secitem *wrappedmackey) { int rv = 0; if (mwrappedenckey || mwrappedmackey) { rv = 1; goto done; } mwrappedenckey = secitem_dupitem(wrappedenckey); if (!mwrappedenckey) { rv = 1; goto done; } mwrappedmackey = seci...
...And 3 more matches

NSS PKCS11 Functions
returns the function returns one of these values: if the slot is implemented in hardware, pr_true.
...returns the function returns one of these values: if token is available, pr_true.
...returns the function returns one of these values: if slot is read-only, pr_true.
...And 3 more matches

pkfnc.html
returns the function returns one of these values: if the slot is implemented in hardware, pr_true.
... returns the function returns one of these values: if token is available, pr_true.
... returns the function returns one of these values: if slot is read-only, pr_true.
...And 3 more matches

JS::CallArgs
(3nd argument of jsnative) methods methods of js::callargs method description bool requireatleast(jscontext *cx, const char *fnname, unsigned required) returns true if there are at least required arguments passed in.
... bool hasdefined(unsigned i) const returns true if the i-th zero-indexed argument is present and is not undefined.
... bool isconstructing() const returns true if the function is called via new.
...And 3 more matches

JS_DeleteProperty2
on success, *succeeded receives false if the property was not deleted because it is permanent and true otherwise.
... description js_deleteproperty2 removes a specified property, name, from an object, obj, and stores true or false in *succeeded.
...then one of the following cases applies: if obj has no property with the given name or id, or if obj inherits the specified property from its prototype, then *succeeded is set to true and obj's jsclass.delproperty hook is called (which may change *succeeded).
...And 3 more matches

Parser API
additional options may be provided via the options object, which can include any of the following properties: loc boolean default: true when loc is true, the parser includes source location information in the returned ast nodes.
... if the generator flag is true, the function is a generator function, i.e., contains a yield expression in its body (other than in a nested function).
... if the expression flag is true, the function is an expression closure and the body field is an expression.
...And 3 more matches

Finishing the Component
(ns_categorymanager_contractid, ns_get_iid(nsicategorymanager), getter_addrefs(catman)); if (ns_failed(rv)) return rv; char* previous = nsnull; rv = catman->addcategoryentry("xpcom-startup", "weblock", weblock_contractid, pr_true, pr_true, &previous); if (previous) nsmemory::free(previous); rv = catman->addcategoryentry("content-policy", "weblock", weblock_contractid, pr_true, pr_true, &previo...
...if the scheme isn't "http", "https", or "ftp", it immediately returns true, which continues the loading process unblocked.
...if they match, the component allows the load to continue by returning true.
...And 3 more matches

nsIClipboardCommands
return value true if an image is selected, false otherwise.
...return value true if an image is selected, false otherwise.
...return value true if a link is selected, false otherwise.
...And 3 more matches

nsILocalFileMac
if the file object is an alias and followlinks is true, returns the target of the alias.
...if the file object is an alias and followlinks is true, returns the target of the alias.
...if the file object is an alias and followlinks is true, returns the target of the alias.
...And 3 more matches

nsIMsgMessageService
amovemessage set to true if you want the message to be moved.
... amovemessage set to true if you want the message to be moved.
...set to true if you want the message appended at the end of the file.
...And 3 more matches

nsIProcess
isrunning boolean true if the process is running, otherwise false.
... void run( in boolean blocking, [array, size_is(count)] in string args, in unsigned long count ); parameters blocking if true, this method will block until the process terminates; if false, the method returns immediately.
... holdweak optional if true, a weak reference is used to hold the observer.
...And 3 more matches

nsIWindowsRegKey
return value this method returns true if the key has changed and false otherwise.
... return value true if the key has a child by the given name.
... return value true if the key has a value by the given name.
...And 3 more matches

Styling the Folder Pane
hasunreadmessages-true afolder.getnumunread(false) > 0 indicates that the folder (but not subfolders) has unread messages.
... isserver-true afolder.isserver indicates that the folder is a root folder (one that represents a server).
... issecure-{true, false} afolder.server.issecure indicates whether or not the connection to the server will be secure.
...And 3 more matches

ByteLengthQueuingStrategy - Web APIs
tegy experimentalchrome full support 59edge full support 16firefox full support 57disabled full support 57disabled disabled from version 57: this feature is behind the dom.streams.enabled preference (needs to be set to true) and the javascript.options.streams preference (needs to be set to true).
...droid full support 59chrome android full support 59firefox android full support 57disabled full support 57disabled disabled from version 57: this feature is behind the dom.streams.enabled preference (needs to be set to true) and the javascript.options.streams preference (needs to be set to true).
...ctor experimentalchrome full support 59edge full support 16firefox full support 57disabled full support 57disabled disabled from version 57: this feature is behind the dom.streams.enabled preference (needs to be set to true) and the javascript.options.streams preference (needs to be set to true).
...And 3 more matches

CountQueuingStrategy - Web APIs
tegy experimentalchrome full support 59edge full support 16firefox full support 57disabled full support 57disabled disabled from version 57: this feature is behind the dom.streams.enabled preference (needs to be set to true) and the javascript.options.streams preference (needs to be set to true).
...droid full support 59chrome android full support 59firefox android full support 57disabled full support 57disabled disabled from version 57: this feature is behind the dom.streams.enabled preference (needs to be set to true) and the javascript.options.streams preference (needs to be set to true).
...ctor experimentalchrome full support 59edge full support 16firefox full support 57disabled full support 57disabled disabled from version 57: this feature is behind the dom.streams.enabled preference (needs to be set to true) and the javascript.options.streams preference (needs to be set to true).
...And 3 more matches

DirectoryEntrySync - Web APIs
var fileentry = fs.root.getfile('seekrits.txt', {create: true}); the getdirectory() method returns a directoryentrysync, which represents a file in the file system.
... var direntry = fs.root.getdirectory('superseekrit', {create: true}); method overview directoryreadersync createreader () raises (fileexception); fileentrysync getfile (in domstring path, in optional flags options) raises (fileexception); directoryentrysync getdirectory (in domstring path, in optional flags options) raises (fileexception); void removerecursively () raises (fileexception); methods createreader() creates a new directoryreadersync to read entries from this directory.
... object literal condition result create: true exclusive: true path already exists an error is thrown.
...And 3 more matches

Document.execCommand() - Web APIs
note: only returns true if part of a user interaction.
...this requires a boolean true/false as the value argument.
...usecss must be true for this to function.
...And 3 more matches

Element.classList - Web APIs
jproto, " ucl", { enumerable: 0, configurable: 0, writeable: 0, value: ele }); } else { ele.classlist=restokenlist, ele[" ucl"]=restokenlist, ele[" uclp"]=protoobj.prototype; } ele.attachevent( "onpropertychange", whenpropchanges ); } try { // much faster & cleaner version for ie8 & ie9: // should work in ie8 because element.prototype instanceof node is true according to the specs window.object.defineproperty(window.element.prototype, "classlist", { enumerable: 1, get: function(val){ if (!hasownprop.call(this, "classlist")) polyfillclasslist(this); return this.classlist; }, configurable: 0, set: function(val){this.classname...
..."add" : "remove"](val), !!arguments[1]); var oldvalue = this.value; return (this.remove(oldvalue), oldvalue === this.value && (this.add(val), true) /*|| false*/); }; if (!domtokenlistproto.replace || typeof testclass.replace("a", "b") !== "boolean") domtokenlistproto.replace = function(oldtoken, newtoken){ checkifvalidclasslistentry("replace", oldtoken), checkifvalidclasslistentry("replace", newtoken); var oldvalue = this.value; return (this.remove(oldtoken), this.value !== oldvalue && (th...
...is.add(newtoken), true)); }; if (!domtokenlistproto.contains) domtokenlistproto.contains = function(value){ for (var i=0,len=this.length; i !== len; ++i) if (this[i] === value) return true; return false; }; if (!domtokenlistproto.foreach) domtokenlistproto.foreach = function(f){ if (arguments.length === 1) for (var i = 0, len = this.length; i !== len; ++i) f( this[i], i, this); else for (var i=0,len=this.length,targ=arguments[1]; i !== len; ++i) f.call(targ, this[i], i, this); }; if (!domtokenlistproto.entries) domtokenlistproto.entries = function(){ var nextindex = 0, that = this; return {next: function() { return nextindex<that.length ?
...And 3 more matches

MediaStreamTrack - Web APIs
mediastreamtrack.enabled a boolean whose value of true if the track is enabled, that is allowed to render the media source stream; or false if it is disabled, that is not rendering the media source stream but silence and blackness.
... mediastreamtrack.isolated read only returns a boolean value which is true if the track is isolated; that is, the track cannot be accessed by the document that owns the mediastreamtrack.
... note: you can implement standard "mute" functionality by setting enabled to false, and unmute the media by setting it back to true again.
...And 3 more matches

PublicKeyCredentialCreationOptions.extensions - Web APIs
if true, the client outputs an array of strings containing the extensions which are supported by the authenticator.
...if true, the client outputs an arraybuffer which contains a value uniquely identifying a user verification data record.
...if true, the client outputs a coordinates object representing the geolocation of the authenticator.
...And 3 more matches

RTCPeerConnection.createOffer() - Web APIs
icerestart optional to restart ice on an active connection, set this to true.
...if this value is true, the remote peer will be offered to send audio data, even if the local side will not be sending audio data.
... in modern implementations, the presence of this member with a value true, will ensure there is at least one transceiver set to receive audio that has not been stopped, and if there isn't one, one will be created.
...And 3 more matches

Using readable streams - Web APIs
if the stream becomes closed, the promise will be fulfilled with an object of the form { value: undefined, done: true }.
... next, we check whether done is true.
... if done is not true, we process the new chunk we’ve read (contained in the value property of the results object) and then call the pump() function again to read the next chunk.
...And 3 more matches

SubtleCrypto.importKey() - Web APIs
a json web key looks something like this (this is an ec private key): { "crv": "p-384", "d": "wouctu7nw4e8_7n5c1-xbjb4xqsb_lizhymsy8mggxuny6q8ncoh9xsiviwlffk_", "ext": true, "key_ops": ["sign"], "kty": "ec", "x": "szrrxmyi8vwfjg1dpunbfcc9jzvjzefh7ulki1ukxaltd7rgwrcffxqygpcwu6aq", "y": "hhuag3ovdzer0uuqnd4pxhqtxp5idgdyhjhl-wlkjngjqaw0rngy5v29-av-ysew" }; examples note: you can try the working examples on github.
...*/ function importsecretkey(rawkey) { return window.crypto.subtle.importkey( "raw", rawkey, "aes-gcm", true, ["encrypt", "decrypt"] ); } pkcs #8 import this example imports an rsa private signing key from a pem-encoded pkcs #8 object.
...contents); // convert from a binary string to an arraybuffer const binaryder = str2ab(binaryderstring); return window.crypto.subtle.importkey( "pkcs8", binaryder, { name: "rsa-pss", // consider using a 4096-bit key for systems that require long-term security moduluslength: 2048, publicexponent: new uint8array([1, 0, 1]), hash: "sha-256", }, true, ["sign"] ); } subjectpublickeyinfo import this example imports an rsa public encryption key from a pem-encoded subjectpublickeyinfo object.
...And 3 more matches

WebGLRenderingContext.colorMask() - Web APIs
default value: true.
...default value: true.
...default value: true.
...And 3 more matches

Migrating from webkitAudioContext - Web APIs
the example below shows old code which downloads an audio file over the network, and then decoded it using createbuffer(): var xhr = new xmlhttprequest(); xhr.open("get", "/path/to/audio.ogg", true); xhr.responsetype = "arraybuffer"; xhr.send(); xhr.onload = function() { var decodedbuffer = context.createbuffer(xhr.response, false); if (decodedbuffer) { // decoding was successful, do something useful with the audio buffer } else { alert("decoding the audio buffer failed"); } }; converting this code to use decodeaudiodata() is relatively simple, as can be seen below: var x...
...hr = new xmlhttprequest(); xhr.open("get", "/path/to/audio.ogg", true); xhr.responsetype = "arraybuffer"; xhr.send(); xhr.onload = function() { context.decodeaudiodata(xhr.response, function onsuccess(decodedbuffer) { // decoding was successful, do something useful with the audio buffer }, function onfailure() { alert("decoding the audio buffer failed"); }); }; note that the decodeaudiodata() method is asynchronous, which means that it will return immediately, and then when the decoding finishes, one of the success or failure callback functions will get called depending on whether the audio decoding was successful.
...ontext can be ported to standards based audiocontext like below: // old webkitaudiocontext code: var osc = context.createoscillator(); osc.type = osc.sine; // sine waveform osc.type = osc.square; // square waveform osc.type = osc.sawtooth; // sawtooth waveform osc.type = osc.triangle; // triangle waveform osc.setwavetable(table); var iscustom = (osc.type == osc.custom); // iscustom will be true // new standard audiocontext code: var osc = context.createoscillator(); osc.type = "sine"; // sine waveform osc.type = "square"; // square waveform osc.type = "sawtooth"; // sawtooth waveform osc.type = "triangle"; // triangle waveform osc.setperiodicwave(table); // note: setwavetable has been renamed to setperiodicwave!
...And 3 more matches

Window.find() - Web APIs
if true, specifies a case-sensitive search.
...if true, specifies a backward search.
...if true, specifies a wrap around search.
...And 3 more matches

Using the aria-invalid attribute - Accessibility
true the value has failed validation.
... any value not in this vocabulary should be treated as true.
... <input name="name" id="name" aria-required="true" aria-invalid="false" onblur="checkvalidity('name', ' ', 'invalid name entered (requires both first and last name)');"/> <br /> <input name="email" id="email" aria-required="true" aria-invalid="false" onblur="checkvalidity('email', '@', 'invalid e-mail address');"/> note that it is not necessary to validate the fields immediately on blur; the application could wait until the ...
...And 3 more matches

Alerts - Accessibility
here is a simple form: <form method="post" action="post.php"> <fieldset> <legend>please enter your contact details</legend> <label for="name">your name (required):</label> <input name="name" id="name" aria-required="true"/> <br /> <label for="email">e-mail address (required):</label> <input name="email" id="email" aria-required="true"/> <br /> <label for="website">website (optional):</label> <input name="website" id="website"/> </fieldset> <label for="message">please enter your message (required):</label> <br /> <textarea name="message" id="message" rows="5" cols="80" ...
... aria-required="true"></textarea> <br /> <input type="submit" name="submit" value="send message"/> <input type="reset" name="reset" value="reset form"/> </form> checking for validity and notifying the user form validations consists of several steps: checking if the e-mail address or entered name are valid.
... if the above criteria is not met, the field’s aria-invalid attribute will be given a value of “true”.
...And 3 more matches

Making content editable - Developer guides
<div contenteditable="true"> this text can be edited by the user.
... </div> here's the above html in action: executing commands when an html element has contenteditable set to true, the document.execcommand() method is made available.
...ccess"); user_pref("capability.policy.allowclipboard.clipboard.paste", "allaccess"); example: a simple but complete rich text editor <!doctype html> <html> <head> <title>rich text editor</title> <script type="text/javascript"> var odoc, sdeftxt; function initdoc() { odoc = document.getelementbyid("textbox"); sdeftxt = odoc.innerhtml; if (document.compform.switchmode.checked) { setdocmode(true); } } function formatdoc(scmd, svalue) { if (validatemode()) { document.execcommand(scmd, false, svalue); odoc.focus(); } } function validatemode() { if (!document.compform.switchmode.checked) { return true ; } alert("uncheck \"show html\"."); odoc.focus(); return false; } function setdocmode(btosource) { var ocontent; if (btosource) { ocontent = document.createtextnode(odoc.
...And 3 more matches

Enumerability and ownership of properties - JavaScript
enumerable properties are those properties whose internal enumerable flag is set to true, which is the default for properties created via simple assignment or via a property initializer (properties defined via object.defineproperty and such default enumerable to false).
... detection can occur by simplepropertyretriever.thegetmethodyouwant(obj).indexof(prop) > -1 iteration can occur by simplepropertyretriever.thegetmethodyouwant(obj).foreach(function (value, prop) {}); (or use filter(), map(), etc.) var simplepropertyretriever = { getownenumerables: function(obj) { return this._getpropertynames(obj, true, false, this._enumerable); // or could use for..in filtered with hasownproperty or just this: return object.keys(obj); }, getownnonenumerables: function(obj) { return this._getpropertynames(obj, true, false, this._notenumerable); }, getownenumerablesandnonenumerables: function(obj) { return this._getpropertynames(obj, true, false, this._enumerableandnotenu...
...merable); // or just use: return object.getownpropertynames(obj); }, getprototypeenumerables: function(obj) { return this._getpropertynames(obj, false, true, this._enumerable); }, getprototypenonenumerables: function(obj) { return this._getpropertynames(obj, false, true, this._notenumerable); }, getprototypeenumerablesandnonenumerables: function(obj) { return this._getpropertynames(obj, false, true, this._enumerableandnotenumerable); }, getownandprototypeenumerables: function(obj) { return this._getpropertynames(obj, true, true, this._enumerable); // or could use unfiltered for..in }, getownandprototypenonenumerables: function(obj) { return this._getpropertynames(obj, true, true, this._notenumerable...
...And 3 more matches

Indexed collections - JavaScript
let arr = [] arr[3.4] = 'oranges' console.log(arr.length) // 0 console.log(arr.hasownproperty(3.4)) // true you can also populate an array when you create it: let myarray = new array('hello', myvar, 3.14159) // or let myarray = ['mango', 'apple', 'orange'] understanding length at the implementation level, javascript's arrays actually store their elements as standard object properties, using the array index as the property name.
...te that the elements of an array that are omitted when the array is defined are not listed when iterating by foreach, but are listed when undefined has been manually assigned to the element: let array = ['first', 'second', , 'fourth'] array.foreach(function(element) { console.log(element) }) // first // second // fourth if (array[2] === undefined) { console.log('array[2] is undefined') // true } array = ['first', 'second', undefined, 'fourth'] array.foreach(function(element) { console.log(element) }) // first // second // undefined // fourth since javascript elements are saved as standard object properties, it is not advisable to iterate through javascript arrays using for...in loops, because normal elements and all enumerable properties will be listed.
... let a1 = ['a', 'b', 'c'] let a2 = a1.map(function(item) { return item.touppercase() }) console.log(a2) // logs ['a', 'b', 'c'] filter(callback[, thisobject]) returns a new array containing the items for which callback returned true.
...And 3 more matches

Array.isArray() - JavaScript
array.isarray([1, 2, 3]); // true array.isarray({foo: 123}); // false array.isarray('foobar'); // false array.isarray(undefined); // false syntax array.isarray(value) parameters value the value to be checked.
... return value true if the value is an array; otherwise, false.
... description if the value is an array, true is returned; otherwise, false is.
...And 3 more matches

Array - JavaScript
as a result, '2' and '02' would refer to two different slots on the years object, and the following example could be true: console.log(years['2'] != years['02']) relationship between length and numerical properties a javascript array's length property and numerical properties are connected.
... array.isarray() returns true if the argument is an array, or false otherwise.
... array.prototype.every() returns true if every element in this array satisfies the testing function.
...And 3 more matches

Object.create() - JavaScript
this is especially true when debugging, since common object-property converting/detecting utility functions may generate errors, or simply lose information (especially if using silent error-traps that ignore errors).
...ons shows the magnitude of the problem more clearly: > alert(oco) // shows [object object] > alert(ocn) // throws error: cannot convert object to primitive value > oco.tostring() // shows [object object] > ocn.tostring() // throws error: ocn.tostring is not a function > oco.valueof() // shows {} > ocn.valueof() // throws error: ocn.valueof is not a function > oco.hasownproperty("p") // shows "true" > ocn.hasownproperty("p") // throws error: ocn.hasownproperty is not a function > oco.constructor // shows "object() { [native code] }" > ocn.constructor // shows "undefined" as said, these differences can make debugging even simple-seeming problems quickly go astray.
...missing object-method directly from the standard-object does not work: ocn = object.create( null ); // create "null" object (same as before) ocn.tostring = object.tostring; // since new object lacks method then try assigning it directly from standard-object > ocn.tostring // shows "tostring() { [native code] }" -- missing method seems to be there now > ocn.tostring == object.tostring // shows "true" -- method seems to be same as the standard object-method > ocn.tostring() // error: function.prototype.tostring requires that 'this' be a function adding the missing object-method directly to new object's "prototype" does not work either, since the new object does not have a real prototype (which is really the cause of all these problems) and one cannot be directly added: ocn = object.crea...
...And 3 more matches

Reflect - JavaScript
returns a boolean that is true if the property was successfully defined.
...returns a boolean that is true if the target is extensible.
...returns a boolean that is true if the update was successful.
...And 3 more matches

RegExp.prototype.test() - JavaScript
returns true or false.
... returns true if there is a match between the regular expression and the string str.
... const str = 'hello world!'; const result = /^hello/.test(str); console.log(result); // true the following example logs a message which depends on the success of the test: function testinput(re, str) { let midstring; if (re.test(str)) { midstring = 'contains'; } else { midstring = 'does not contain'; } console.log(`${str} ${midstring} ${re.source}`); } using test() on a regex with the "global" flag when a regex has the global flag set, test() will advance the last...
...And 3 more matches

Logical AND (&&) - JavaScript
the logical and (&&) operator (logical conjunction) for a set of operands is true if and only if all of its operands are true.
... syntax expr1 && expr2 description if expr1 can be converted to true, returns expr2; else, returns expr1.
... if a value can be converted to true, the value is so-called truthy.
...And 3 more matches

Logical OR (||) - JavaScript
the logical or (||) operator (logical disjunction) for a set of operands is true if and only if one or more of its operands is true.
... syntax expr1 || expr2 description if expr1 can be converted to true, returns expr1; else, returns expr2.
... if a value can be converted to true, the value is so-called truthy.
...And 3 more matches

Interacting with page scripts - Archive of obsolete content
to do this, add an option called “unsafe-content-script” under the “permissions” key in package.json, and set it to true.
... "permissions": { "unsafe-content-script": true } this is only a temporary migration aid, and will be removed eventually.
...cript> </body> </html> the content script "content-script.js" adds an event listener to the button, that sends a custom event containing a message: var messenger = document.getelementbyid("message"); messenger.addeventlistener("click", sendcustomevent, false); function sendcustomevent() { var greeting = {"greeting" : "hello world"}; var event = new customevent("addon-message", { bubbles: true, detail: greeting }); document.documentelement.dispatchevent(event); } finally, the page script "page-script.js" listens for the message and logs the greeting to the web console: window.addeventlistener("addon-message", function(event) { console.log(event.detail.greeting); }, false); after firefox 30: clone the message object this technique depends on being able to share the message pay...
...And 2 more matches

places/bookmarks - Archive of obsolete content
base // and store the emitter let emitter = save(bookmark); // listen for events emitter.on("data", function (saved, inputitem) { // on a "data" event, an item has been updated, passing in the // latest snapshot from the server as `saved` (with properties // such as `updated` and `id`), as well as the initial input // item as `inputitem` console.log(saved.title === inputitem.title); // true console.log(saved !== inputitem); // true console.log(inputitem === bookmark); // true }).on("end", function (saveditems, inputitems) { // similar to "data" events, except "end" is an aggregate of // all progress events, with ordered arrays as `saveditems` // and `inputitems` }); creating several bookmarks with a new group let { bookmark, group, save } = require("sdk/places/bookmarks"...
... save(bookmarks).on("data", function (saved, input) { // a data event is called once for each item saved, as well // as implicit items, like `group` console.log(input === group || ~bookmarks.indexof(input)); // true }).on("end", function (saves, inputs) { // like the previous example, the "end" event returns an // array of all of our updated saves.
... deleting items: to delete a bookmark item, pass in a bookmark item with a property remove set to true.
...And 2 more matches

Adding Toolbars and Toolbar Buttons - Archive of obsolete content
<window id="main-window"> <toolbox id="navigator-toolbox"> <toolbar id="xulschoolhello-toolbar" toolbarname="&xulschoolhello.toolbarname.label;" accesskey="&xulschoolhello.toolbar.accesskey;" customizable="true" mode="icons" context="toolbar-context-menu" defaultset="xulschoolhello-hello-world-button" insertbefore="personaltoolbar" /> </toolbox> </window> (note for mac os x: <window id="main-window"> and </window> are not required) our toolbar is added as a child of the toolbox element in the main browser window.
...you should normally set this to true, unless you have strong reasons not to want users changing your toolbar.
...*/ toolbarbutton.xulschoolhello-toolbarbutton, window:not([active="true"]) toolbarbutton.xulschoolhello-toolbarbutton, toolbar[iconsize="small"] toolbarbutton.xulschoolhello-toolbarbutton { list-style-image: url("chrome://xulschoolhello-os/skin/toolbar.png"); } #xulschoolhello-hello-world-button { -moz-image-region: rect(0px, 16px, 16px, 0px); } mac os x: /* the second and third selectors at the bottom are necessary to prevent conflicts with installed the...
...And 2 more matches

Index - Archive of obsolete content
from there you call editingsession->makewindoweditable(domwindow, editortype, pr_true).
... 803 clicktoscroll clicktoscroll, if true, the arrows must be clicked to scroll the scrollbox content.
... 1820 appendchild node appendchild ( node newchild ) 1821 arrowscrollbox xul elements, xul reference clicktoscroll, if true, the arrows must be clicked to scroll the scrollbox content.
...And 2 more matches

Microsummary XML grammar reference - Archive of obsolete content
child elements: <condition> (optional) an xpath boolean expression along with a conditional interval of time, in minutes, that must elapse between updates if the expression evaluates to true.
...if the expression evaluates to true, firefox applies that element's interval and stops processing child elements.
... if there are no <condition> child elements, or if none of their expressions evaluate to true, firefox applies the value of the <update> element's interval attribute.
...And 2 more matches

Building accessible custom components in XUL - Archive of obsolete content
<code> var gfocuscell = null; function install_handlers() { var spreadsheet = window.document.getelementbyid('accjaxspreadsheet'); spreadsheet.addeventlistener('focus', spreadsheet_focus, true); spreadsheet.addeventlistener('click', spreadsheet_click, true); } function spreadsheet_focus(e) { if (e.target.tagname == 'grid') { if (!gfocuscell) { gfocuscell = e.target.getelementsbytagname('label')[0]; } gfocuscell.focus(); } else { gfocuscell = e.target; } } function spreadsheet_click(e) { e.target.focus(); } </code> finall...
... <caption>cells really get focus</caption> further reading key-navigable custom dhtml widgets on mozilla.org adding keyboard navigation download stage-4.zip install stage-4.xpi true accessibility requires complete keyboard navigability.
...<code> function install_handlers() { var spreadsheet = window.document.getelementbyid('accjaxspreadsheet'); spreadsheet.addeventlistener('keypress', spreadsheet_keypress, true); spreadsheet.addeventlistener('focus', spreadsheet_focus, true); spreadsheet.addeventlistener('click', spreadsheet_click, true); } </code> with this new event handler and associated helper functions, we can navigate between cells and headers using the arrow keys.
...And 2 more matches

Document Object Model - Archive of obsolete content
in a browser context, the window is the global object, and the same is also true for xul.
... <tree id="results" hidden="true" flex="1"> .
...<splitter id="splitbar" resizeafter="grow" hidden="true"/> <hbox> <progressmeter id="progmeter" value="50%" style="margin: 4px;" hidden="true"/> we've added the hidden attribute and set the value to true.
...And 2 more matches

More Tree Features - Archive of obsolete content
you do this by adding the container attribute to it as follows: <treeitem container="true" /> this allows the user to click on the row that corresponds to the treeitem to expand and collapse the inner rows.
...example hierarchical tree the following is a simple example: example 1 : source view <tree rows="6"> <treecols> <treecol id="firstname" label="first name" primary="true" flex="3" /> <treecol id="lastname" label="last name" flex="7" /> </treecols> <treechildren> <treeitem container="true" open="true"> <treerow> <treecell label="guys" /> </treerow> <treechildren> <treeitem> <treerow> <treecell label="bob" /> <treecell label="carpenter" /> </treerow> </treeitem> ...
...(note the mixed case.) if set to true, the user may drag the column headers around to rearrange the order of the columns.
...And 2 more matches

Trees and Templates - Archive of obsolete content
example 1 : source <tree id="my-tree" flex="1" datasources="rdf:files" ref="nc:filesroot" flags="dont-build-content"> <treecols> <treecol id="name" label="name" primary="true" flex="1"/> <splitter/> <treecol id="date" label="date" flex="1"/> </treecols> <template> <rule> <treechildren> <treeitem uri="rdf:*"> <treerow> <treecell label="rdf:http://home.netscape.com/nc-rdf#name"/> <treecell label="rdf:http://home.netscape.com/web-rdf#lastmodifieddate"/> </treerow> </treei...
... the final attribute, sortactive should be set to true for one column, the one that you would like to be sorted by default.
... the following example changes the columns in the earlier example to incorporate the extra features: <treecols> <treecol id="name" label="name" flex="1" primary="true" sortactive="true" sortdirection="ascending" sort="rdf:http://home.netscape.com/nc-rdf#name"/> <splitter/> <treecol id="date" label="date" flex="1" sort="rdf:http://home.netscape.com/web-rdf#lastmodifieddate"/> </treecols> persisting column state one additional thing you might want to do is persist which column is currently sorted, so that it is remembered between sessions.
...And 2 more matches

XUL Questions and Answers - Archive of obsolete content
hidechrome="true" doesn’t work on a mac?
...tml="http://www.w3.org/1999/xhtml" xmlns="http://www.mozilla.org/keymaster/gat...re.is.only.xul"> <listbox rows="4"> <listhead> <listheader label="multi-column"/> </listhead> <listcols> <listcol flex="1"/> </listcols> <listitem> <listcell type="checkbox" value="1" label="vghkvghk"/> </listitem> <listitem> <listcell type="checkbox" value="2" label="vghjkvk" checked="true"/> </listitem> <listitem> <listcell type="checkbox" value="3" label="hukfzgjcfj" disabled="true"/> </listitem> </listbox> <listbox rows="4"> <listhead> <listheader label="single-column"/> </listhead> <listitem type="checkbox" value="1" label="vghkvghk"/> <listitem type="checkbox" value="2" label="vghjkvk" checked="true"/> <listitem type="checkbox" value="3" label="...
...hukfzgjcfj" disabled="true"/> </listbox> </window> list box handlers can only check for listitems not listcells.
...And 2 more matches

XUL controls - Archive of obsolete content
<checkbox label="show toolbar labels" checked="true"/> more information about the checkbox element.
... menulist reference related elements: menupopup menuitem <menulist editable="true"> an editable menulist is like a standard menulist except that the selected value is displayed in a textbox where it may be modified directly or values not in the popup list may be entered.
... <menulist editable="true"> <menupopup> <menuitem label="elephants"/> <menuitem label="kangaroos"/> <menuitem label="bats" /> </menupopup> </menulist> more information about the editable menulist element.
...And 2 more matches

browser - Archive of obsolete content
, goback, goforward, gohome, gotoindex, loaduri, loaduriwithflags, reload, reloadwithflags, removeprogresslistener, stop, swapdocshells examples <!-- shows mozilla homepage inside a groupbox --> <groupbox flex="1"> <caption label="mozilla homepage"/> <browser type="content" src="http://www.mozilla.org" flex="1"/> </groupbox> attributes autocompleteenabled type: boolean set to true to enable autocomplete of fields.
...if this attribute is set to true or omitted, autoscroll will be enabled or depending on the user preference general.autoscroll.
... disablesecurity type: boolean set this attribute to true to disable the security ui for this browser.
...And 2 more matches

richlistbox - Archive of obsolete content
do not set the attribute to true, as this will suggest you can set it to false to enable the element again, which is not the case.
...this feature may be disabled by setting this attribute to true.
...if set to true, the select event is never fired.
...And 2 more matches

tabs - Archive of obsolete content
dindex, tabbox, tabindex, tooltiptextnew, value, properties accessibletype, disabled, itemcount, selectedindex, selecteditem, tabindex, value, methods advanceselectedtab, appenditem, getindexofitem, getitematindex, insertitemat, removeitemat examples (example needed) attributes closebutton obsolete since gecko 1.9.2 type: boolean if this attribute is set to true, the tabs row will have a "new tab" button and "close" button on the ends.
... disableclose type: boolean if this attribute is true the close button will be disabled.
...do not set the attribute to true, as this will suggest you can set it to false to enable the element again, which is not the case.
...And 2 more matches

timepicker - Archive of obsolete content
do not set the attribute to true, as this will suggest you can set it to false to enable the element again, which is not the case.
... readonly type: boolean if set to true, then the user cannot change the value of the element.
...this should be used in combination with setting hideseconds to true.
...And 2 more matches

where - Archive of obsolete content
if the condition is true, the corresponding action body is generated; otherwise the result is ignored and no content is generated.
... attributes ignorecase, multiple, negate, rel, subject, value examples (example needed) attributes ignorecase type: boolean set to true to indicate that the case does not matter when making comparisons.
... multiple type: boolean set to true to indicate that the value contains multiple values separated by commas.
...And 2 more matches

Back to the Server: Server-Side JavaScript On The Rise - Archive of obsolete content
this statement is of the form <functionname>.proxy = true.
... listing 5 - demonstration of server-proxy <script runat="server"> function notexposed() { // runs on the server, hidden from the browser return "can't see me!"; } function exposed() { // runs on the server, callable from the browser return "exposed to the browser"; } exposed.proxy = true; // tell jaxer this function is ok to be called from the browser </script> <script runat="client" type="text/javascript"> alert( exposed() ); //works like a charm alert( notexposed() ); //produces an object not found error since it server-side only </script> understanding the concept of operating context in jaxer is central to moving forward with the example application whi...
...email, message ) { // perform the same validation of the data server-side if( !validatecomments( name, email, message ) ) { throw "incomplete data was submitted."; } // assemble the string var s = "name: " + name + "<br/>" + "email: " + email + "<br/>" + "message: " + message + "<br/><br/>"; // append the entry to the log file jaxer.file.append( "dump.txt", s ); } formprocessor.proxy = true; </script> the first function, formhandler, performs some first-level validation using the validatecomments function.
...And 2 more matches

Windows Media in Netscape - Archive of obsolete content
example 1: client-side detection scripts browser architecture supports: netscapeplugin windows media player installed: true windows media scriptable: false windows media version: pluginversion a complete source code listing showing how that detection was done can be found here (devedge-temp).
... this is the example: needs to be embedded in wiki page (can it just be put here?) <object id="playerex2" classid="clsid:6bf52a52-394a-11d3-b153-00c04f79faa6" height="200" width="200"> <param name="uimode" value="full"> <param name="autostart" value="true"> <param name="url" value="media/preludesteel.wma"> your browser does not support the activex windows media player </object> the same markup (used above and shown below) will work in both ie and netscape 7.1.
... <object id="playerex2" classid="clsid:6bf52a52-394a-11d3-b153-00c04f79faa6" height="200" width="200"> <param name="uimode" value="full" /> <param name="autostart" value="true" /> <param name="url" value="preludesteel.wma" /> your browser does not support the activex windows media player </object> the classid attribute references the clsid of windows media player 7 and above -- windows media player versions before 7 used a different clsid.
...And 2 more matches

Index - MDN Web Docs Glossary: Definitions of Web-related terms
for example, you can put a block of statements after an if (condition) block, indicating that the interpreter should run the code inside the block if the condition is true, or skip the whole block if the condition is false.
... 36 boolean boolean, codingscripting, glossary, javascript, programming languages, data types in computer science, a boolean is a logical data type that can have only the values true or false.
...for example, in javascript the addition operator ("+") adds numbers together and concatenates strings, whereas the "not" operator ("!") negates an expression — for example making a true statement return false.
...And 2 more matches

Drawing graphics - Learn web development
let's try adding another arc: ctx.fillstyle = 'yellow'; ctx.beginpath(); ctx.arc(200, 106, 50, degtorad(-45), degtorad(45), true); ctx.lineto(200, 106); ctx.fill(); the pattern here is very similar, but with two differences: we have set the last parameter of arc() to true, meaning that the arc is drawn counterclockwise, which means that even though the arc is specified as starting at -45 degrees and ending at 45 degrees, we draw the arc around the 270 degrees not inside this portion.
... if you were to change true to false and then re-run the code, only the 90 degree slice of the circle would be drawn.
...we also use onmousedown and onmouseup event handlers to change the value of pressed to true when the mouse button is pressed, and back to false again when it is released.
...And 2 more matches

Componentizing our Svelte app - Learn web development
e // restores name to its initial value and editing = false // and exit editing mode } function onsave() { update({ name: name }) // updates todo name editing = false // and exit editing mode } function onremove() { dispatch('remove', todo) // emit remove event } function onedit() { editing = true // enter editing mode } function ontoggle() { update({ completed: !todo.completed}) // updates todo status } updating the markup now we need to update our todo component's markup to call the above functions when the appropriate actions are taken.
...when it's true, it should display the <input> field for editing the todo name, and the cancel and save buttons.
... when editing is true, for example, svelte will show the update form; when it's false, it will remove it from the dom and add in the checkbox.
...And 2 more matches

Vue conditional rendering: editing existing todos - Learn web development
"button" class="btn" @click="oncancel"> cancel <span class="visually-hidden">editing {{label}}</span> </button> <button type="submit" class="btn btn__primary"> save <span class="visually-hidden">edit for {{label}}</span> </button> </div> </form> </template> <script> export default { props: { label: { type: string, required: true }, id: { type: string, required: true } }, data() { return { newlabel: this.label }; }, methods: { onsubmit() { if (this.newlabel && this.newlabel !== this.label) { this.$emit("item-edited", this.newlabel); } }, oncancel() { this.$emit("edit-cancelled"); } } }; </script> <style scoped> .edit-label { font-f...
...this handler will set an isediting flag to true.
... add isediting below your existing isdone data point: data() { return { isdone: this.done, isediting: false }; } now add your methods inside a methods property, right below your data() property: methods: { deletetodo() { this.$emit('item-deleted'); }, toggletoitemeditform() { this.isediting = true; } } conditionally displaying components via v:if and v:else now we have an isediting flag that we can use to signify that the item is being edited (or not).
...And 2 more matches

Debugging on Mac OS X
if you are using lldb on the command line (independently of xcode) and you will always run it from either the top source directory, the object directory or else the dist/bin subdirectory of the object directory, then adding the following setting to your $home/.lldbinit is sufficient: settings set target.load-cwd-lldbinit true however, if you will run lldb from a different directory, or if you will be running it indirectly by debugging in xcode (xcode always runs lldb from "/"), then this setting will not help you.
...# therefore setting `settings set target.load-cwd-lldbinit true` can't help us # without xcode providing that functionality.) # # the following works by setting a one-shot breakpoint to break on a function # that we know will both run early (which we want when we start first start the # app) and run frequently (which we want so that it will trigger asap if we # attach to an already running app).
...# breakpoint set --name nsthread::processnextevent --thread-index 1 --auto-continue true --one-shot true breakpoint command add -s python # this script that we run does not work if we try to use the global 'lldb' # object, since it is out of date at the time that the script runs (for # example, `lldb.target.executable.fullpath` is empty).
...And 2 more matches

Extending a Protocol
and the inverse is also true, as you will soon see: pecho.idpl will need explicitly state that pwindowglobal.ipdl is managing it.
...deallocpechoparent(pechoparent* aactor) so, let's add: already_addrefed<echoparent> windowglobalparent::allocpechoparent() { puts("windowglobalparent::allocpechoparent was called"); refptr<echoparent> actor = new echoparent(); return actor.forget(); } bool windowglobalparent::deallocpechoparent( pechoparent* aactor) { refptr actor = dont_addref(static_cast(aactor)); return true; } the "puts()" there will help us see what's going on once we get things going.
... open up dom/ipc/windowglobalchild.cpp and let's implement: allocpechochild() deallocpechochild(pechochild* aactor) already_addrefed<echochild> windowglobalchild::allocpechochild() { refptr<echochild> actor = new echochild(); return actor.forget(); } bool windowglobalchild::deallocpechochild(pechochild* actor) { delete actor; return true; } and now finally, let's implement echochild.cpp and echoparent.cpp.
...And 2 more matches

JSPropertyOp
strict bool (jsstrictpropertyop only) if strict is true, treating the assignment as strict mode code.
... if a jspropertyop or jsstrictpropertyop does nothing and returns true, then property get, set, or add is unaffected.
...otherwise the callback must return true, and the property operation proceeds.
...And 2 more matches

JS_AddArgumentFormatter
on success, it returns js_true.
... fromjs jsbool js_true if the conversion function should convert from jsval values to c values; js_false if the conversion function should convert from c values to jsval values.
... callback description the conversion function should return true on success, and return false after reporting an error or detecting an already-reported error.
...And 2 more matches

JS_PropertyStub
it behaves exactly like a property callback that accepts the default property behavior: it does nothing and returns true.
...it behaves exactly like a property callback that accepts the default property behavior: it does nothing and returns true.
...it behaves exactly like a property callback that accepts the default property behavior: it does nothing and returns true.
...And 2 more matches

Mozilla internal string guide
use this instead of testing string.length == 0 .equals(string) - true if the given string has the same value as the current string.
... iterators because mozilla strings are always a single buffer, iteration over the characters in the string is done using raw pointers: /** * find whether there is a tab character in `data` */ bool hastab(const nsastring& data) { const char16_t* cur = data.beginreading(); const char16_t* end = data.endreading(); for (; cur < end; ++cur) { if (char16_t('\t') == *cur) return true; } return false; } note that `end` points to the character after the end of the string buffer.
...this is useful when initially requesting best-case buffer size without yet knowing the true size need.
...And 2 more matches

mozIThirdPartyUtil
for example, if auri is "http://mail.google.com/", achannel has a uri of "http://google.com/", and its parent is the topmost content window with a uri of "http://mozilla.com", the result will be true.
... return value true if auri is third party with respect to the channel uri or any of the uris associated with the same-type window hierarchy of the channel.
...boolean isthirdpartyuri( in nsiuri afirsturi, in nsiuri aseconduri ); parameters afirsturi missing description aseconduri missing description return value true if afirsturi is third party with respect to aseconduri.
...And 2 more matches

nsIAppShellService
attributes attribute type description applicationprovidedhiddenwindow boolean return true if the application hidden window was provided by the application.
... return value true if a window was opened.
...to get an out of process element you want to communicate with via message manager, then append a browser element with remote attribute set to true.
...And 2 more matches

nsIApplicationUpdateService
canapplyupdates boolean true if the update service can download and install updates.
... cancheckforupdates boolean true if the update service can check for updates.
... canupdate boolean true if the update service is able to download and install updates.
...And 2 more matches

nsICookieManager2
aissecure true if the cookie should only be sent over a secure connection.
... aishttponly true if the cookie should only be sent to, and can only be modified by, an http connection.
... aissession true if the cookie should exist for the current session only.
...And 2 more matches

nsIDOMNSHTMLDocument
return value true if the command was recognized, false otherwise.
... return value returns true if the command is supported and enabled, false otherwise.
... return value for stateful commands, returns true if the command is in an indeterminate state, false otherwise.
...And 2 more matches

nsIFileView
to create an instance, use: var fileview = components.classes["@mozilla.org/filepicker/fileview;1"] .createinstance(components.interfaces.nsifileview); method overview void setdirectory(in nsifile directory); void setfilter(in astring filterstring); void sort(in short sorttype, in boolean reversesort); attributes attribute type description reversesort boolean if true results will be sorted in ascending order.
... showhiddenfiles boolean if true hidden files will be shown.
... showonlydirectories boolean if true only directory entries will be returned.
...And 2 more matches

nsIFrameScriptLoader
if this function is called on a chromemessagebroadcaster (for example, a global frame message manager or a window message manager) then: loadframescript() will load the frame script independently into each applicable frame: every open frame in the given window for the window message manager, or every frame in every window for the global message manager if aallowdelayedload is true, then the script will also be loaded into any applicable new frames opened after the loadframescript() call.
... if this function is called on a chromemessagesender: it will load the frame script only into this chromemessagesender's frame aallowdelayedload should always be true.
... for example: let windowmm = window.messagemanager; windowmm.loadframescript('data:,dump("foo\n");', true); this will load a separate instance of the frame script into every tab open in the window associated with this window message manager.
...And 2 more matches

nsIMacDockSupport
void activateapplication( in boolean aignoreotherapplications ); parameters aignoreotherapplications if true, the application is activated regardless of the state of other applications.
...in.document.createelementns('http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul', 'menuitem'); macmenuitem.setattribute('label', 'show most recent window'); macmenuitem.setattribute('id', 'mymacmenuitem'); macmenuitem.addeventlistener('command', function(){ var docksupport = cc['@mozilla.org/widget/macdocksupport;1'].getservice(ci.nsimacdocksupport); docksupport.activateapplication(true); services.wm.getmostrecentwindow(null).focus() }) macmenu.appendchild(macmenuitem); var mainpopupset = win.document.getelementbyid('mainpopupset'); mainpopupset.appendchild(macmenu); let dockmenuelement = macmenu; //document.getelementbyid("menu_mac_dockmenu");66 let nativemenu = cc["@mozilla.org/widget/standalonenativemenu;1"].createinstance(ci.nsistandalonenativemenu); console.log('dockmen...
...notice the activateapplication(true), if this is not done then firefox will not be activated.
...And 2 more matches

nsIMsgDBView
true if it is enabled.
... return values true if the motion is available.
... void reloadmessage(); reloadmessagewithallparts() reload the currently shown message with fetchcompletemessage set to true.
...And 2 more matches

nsINavBookmarksService
if ownsweak is true, then aobserver must implement nsisupportsweakreference, and the bookmark service will keep a weak reference to the observer.
...if this is set to true, ui will not allow the user to add, remove, or reorder children in this folder.
... return value returns true if the folder is marked as read-only, otherwise returns false.
...And 2 more matches

nsINavHistoryContainerResultNode
childrenreadonly boolean false if the node's list of children can be modified (by adding or removing children, or rearranging them), or true if the user interface should not allow the list of children to be altered.
...it's true for non-folder nodes.
... containeropen boolean set this to true to allow descent into this container.
...And 2 more matches

nsIOutputStream
this exception may only be thrown if isnonblocking() returns true.
...this exception may only be thrown if isnonblocking() returns true.
... return value true if stream is non-blocking.
...And 2 more matches

nsIProcessScriptLoader
if aallowdelayedload is true, then the script will also be loaded into any new child processes created after the loadprocessscript() call.
... if this function is called on a chromemessagesender: it will load the process script only into this chromemessagesender's child process aallowdelayedload should always be true.
... for example: let ppmm = services.ppmm.getchildat(1); ppmm.loadprocessscript('data:,dump("foo\n");', true); parameters name type description aurl string url for the script to load.
...And 2 more matches

nsISHistoryListener
return value true to allow the go back operation to proceed or false to cancel it.
... return value true to allow the go forward operation to proceed or false to cancel it.
... return value true to allow the operation to proceed or false to cancel it.
...And 2 more matches

nsITaskbarPreviewButton
attributes attribute type description disabled boolean if true, the button is disabled.
... dismissonclick boolean if true, the array of previews should be dismissed when the button is clicked.
... hasborder boolean if true, the taskbar should draw a border around this button's image.
...And 2 more matches

nsIURI
for example, comparing "http://foo.com:80/" and "http://foo.com/" will return true.
... return value true if the two uris represent the same location; otherwise false.
...for example, comparing "http://foo.com/#" and "http://foo.com/" or "http://foo.com/#aaa" and "http://foo.com/#bbb" will return true.
...And 2 more matches

nsIUpdatePrompt
if the app.update.silent preference is true or the user interface is already displayed the call will be a no-op.
...if background is true (for example the download was not user initiated) and the app.update.silent preference is true the call will be a no-op.
...background optional an optional parameter that, if provided and true, presents a less-obtrusive, non-modal notification alert.
...And 2 more matches

nsMsgNavigationType
for example to move forward a message, you would call: // assuming gdbview is a global nsimsgdbview var resultid = new object(); var resultindex = new object(); var threadindex = new object(); gdbview.viewnavigate(components.interfaces.nsmsgnavigationtype.nextmessage, resultid, resultindex, threadindex, true); the nsmsgnavigationtype interface is defined as a global variable in thunderbird: var nsmsgviewcommandtype = components.interfaces.nsmsgviewcommandtype; mailnews/base/public/nsimsgdbview.idlscriptable please add a summary to this article.
...will wrap around if the wrap flag is set to true.
...will wrap around if the wrap flag is set to true.
...And 2 more matches

Plug-in Basics - Plugins
for example, this object element calls a plug-in that displays video: <object data="newave.avi" type="video/avi" width="320" height="200" autostart="true" loop="true"> </object> a hidden plug-in is a type of embedded plug-in that is not drawn on the screen when it is invoked.
...here's an example: <embed src="audiplay.aiff" type="audio/x-aiff" hidden="true"> note: whether a plug-in is windowed or windowless is not meaningful if the plug-in is invoked with the hidden attribute.
... the embed element has the following syntax and attributes: <embed src="location" type="mimetype" pluginspage="instrurl" pluginurl="pluginurl" align="left"|"right"|"top"|"bottom" border="borderwidth" frameborder="no" height="height" width="width" units="units" hidden="true|false" hspace="horizmargin" vspace="vertmargin" name="pluginname" palette="foreground"|"background" > ...
...And 2 more matches

Browser Console - Firefox Developer Tools
to enable it set the devtools.chrome.enabled preference to true in about:config, or set the "enable browser chrome and add-on debugging toolboxes" (firefox 40 and later) option in the developer tool settings.
... here is an example on how to clear the contents of the browser console: components.utils.import("resource://devtools/shared/loader.jsm"); var hudservice = devtools.require("devtools/client/webconsole/hudservice"); var hud = hudservice.getbrowserconsole(); hud.jsterm.clearoutput(true); if you would like to access the content document of the browser console this can be done with the hudservice.
..." button it will clear the browser console: components.utils.import("resource://devtools/shared/loader.jsm"); var hudservice = devtools.require("devtools/client/webconsole/hudservice"); var hud = hudservice.getbrowserconsole(); var clearbtn = hud.chromewindow.document.queryselector('.webconsole-clear-console-button'); clearbtn.addeventlistener('mouseover', function() { hud.jsterm.clearoutput(true); }, false); bonus features available for add-on sdk add-ons, the console api is available automatically.
...And 2 more matches

Debugger.Script - Firefox Developer Tools
accessor properties of the debugger.script prototype object a debugger.script instance inherits the following accessor properties from its prototype: isgeneratorfunction true if this instance refers to a jsscript for a function defined with a function* expression or statement.
... isasyncfunction true if this instance refers to a jsscript for an async function, defined with an async function expression or statement.
...the object has the following properties: linenumber: the line number for which offset is an entry point columnnumber: the column number for which offset is an entry point isentrypoint: true if the offset is a column entry point, as would be reported by getallcolumnoffsets(); otherwise false.
...And 2 more matches

AudioWorkletProcessor.process - Web APIs
returning true forces the web audio api to keep the node alive, while returning false allows the browser to terminate the node if it is neither generating new audio data nor receiving data through its inputs that it is processing.
...an audioworkletprocessor implementing such a node should return true from the process method as long as it produces an output.
...for example, take the audiobuffersourcenode — the processor behind such a node should return true from the process method while the buffer is playing, and start returning false when the buffer playing has ended (there's no way to call play on the same audiobuffersourcenode again).
...And 2 more matches

Using the CSS Typed Object Model - Web APIs
btnwidth = allcomputedstyles.get('width') console.log( btnwidth ); // cssmathsum console.log( btnwidth.values ); // cssnumericarray {0: cssunitvalue, 1: cssunitvalue, length: 2} console.log( btnwidth.operator ); // 'sum' // csstransformvalue let transform = allcomputedstyles.get('transform'); console.log( transform ); // csstransformvalue {0: cssscale, 1: csstranslate, length: 2, is2d: true} console.log( transform.length ); // 1 console.log( transform[0] ); // cssscale {x: cssunitvalue, y: cssunitvalue, z: cssunitvalue, is2d: true} console.log( transform[0].x ); // cssunitvalue {value: 0.95, unit: "number"} console.log( transform[0].y ); // cssunitvalue {value: 0.95, unit: "number"} console.log( transform[0].z ); // cssunitvalue {value: 1, unit: "number"} console.log( tran...
...sform.is2d ); // true // cssimagevalue let bgimage = allcomputedstyles.get('background-image'); console.log( bgimage ); // cssimagevalue console.log( bgimage.tostring() ); // url("https://mdn.mozillademos.org/files/16793/magicwand.png") // cssunparsedvalue let unit = allcomputedstyles.get('--unit'); console.log( unit ) // let parsedunit = cssnumericvalue.parse( unit ); console.log( parsedunit ); console.log( parsedunit.unit ); console.log( parsedunit.value ); for this example to work, the example must be closed out here.
... let transform = allcomputedstyles.get('transform'); console.log( transform ); // csstransformvalue {0: cssscale, 1: csstranslate, length: 2, is2d: true} console.log( transform.length ); // 1 console.log( transform[0] ); // cssscale {x: cssunitvalue, y: cssunitvalue, z: cssunitvalue, is2d: true} console.log( transform[0].x ); // cssunitvalue {value: 0.95, unit: "number"} console.log( transform[0].y ); // cssunitvalue {value: 0.95, unit: "number"} console.log( transform[0].z ); // cssunitvalue {value: 1, unit: "number"} console.log( t...
...And 2 more matches

Cache.delete() - Web APIs
the delete() method of the cache interface finds the cache entry whose key is the request, and if found, deletes the cache entry and returns a promise that resolves to true.
... if set to true, the ?value=bar part of http://foo.com/?value=bar would be ignored when performing a match.
... ignoremethod: a boolean that, when set to true, prevents matching operations from validating the request http method (normally only get and head are allowed.) it defaults to false.
...And 2 more matches

KeyboardEvent.initKeyEvent() - Web APIs
ctrlkeyarg is a boolean that is true if the virtual key to be generated is a combination of keys containing the ctrl key.
... altkeyarg is a boolean that is true if the virtual key to be generated is a combination of keys containing the alt key.
... shiftkeyarg a boolean that is true if the virtual key to be generated is a combination of keys containing the shift key.
...And 2 more matches

MouseEvent - Web APIs
mouseevent.altkey read only returns true if the alt key was down when the mouse event was fired.
... mouseevent.ctrlkey read only returns true if the control key was down when the mouse event was fired.
... mouseevent.metakey read only returns true if the meta key was down when the mouse event was fired.
...And 2 more matches

MutationObserverInit.attributeFilter - Web APIs
if this property is specified, there's no need to also set attributes to true, as it's implied.
... if the attributes permission is true but no attributefilter is included in the options object, all attributes' values are watched for changes.
... if this property exists on the options object when the mutationobserver() constructor is used to create a new mutationobserver, attribute monitoring is enabled regardless of whether or not the attributes property is true.
...And 2 more matches

MutationObserverInit.attributes - Web APIs
syntax var options = { attributes: true | false } value a boolean value indicating whether or not to report through the callback any changes to the values of attributes on the node or nodes being monitored.
... if true, the callback specified when observe() was used to start observing the node or subtree will be called any time one or more attributes have changed on observed nodes.
... subtree lets you specify whether to watch the target node and all of its descendants (true), or just the target node (false).
...And 2 more matches

MutationObserverInit.characterData - Web APIs
so either pass directly a text node to the observe() method or you need to also set subtree: true.
... syntax var options = { characterdata: true | false } value a boolean value indicating whether or not to call the observer's callback function when textual nodes' values change.
... if true, the callback specified when observe() was used to start observing the node or subtree is called any time the contents of a text node are changed.
...And 2 more matches

MutationObserverInit.subtree - Web APIs
the mutationobserverinit dictionary's optional subtree property can be set to true to monitor the targeted node and all of its descendants.
... syntax var options = { subtree: true | false } value a boolean value.
...changing this value to true causes the entire subtree rooted at the specified target node to be monitored for the changes indicated by the other options.
...And 2 more matches

Navigator.onLine - Web APIs
the property returns a boolean value, with true meaning online and false meaning offline.
... in chrome and safari, if the browser is not able to connect to a local area network (lan) or a router, it is offline; all other conditions return true.
... so while you can assume that the browser is offline when it returns a false value, you cannot assume that a true value necessarily means that the browser can access the internet.
...And 2 more matches

PaymentResponse - Web APIs
this option is only present when the requestpayeremail option is set to true in the options parameter of the paymentrequest() constructor.
...this option is only present when the requestpayername option is set to true in the options parameter of the paymentrequest() constructor.
...this option is only present when the requestpayerphone option is set to true in the options parameter of the paymentrequest() constructor.
...And 2 more matches

RTCIceCandidateStats.deleted - Web APIs
if this value is true, the candidate described by the rtcicecandidatestats object is no longer under consideration.
... dthe exact meaning varies depending on the type of candidate: local candidate a value of true means the candidate has been deleted as described by rfc 5245: 8.3.
... host candidate a value of true indicates that the candidate's network resources have been released.
...And 2 more matches

RTCOfferOptions.iceRestart - Web APIs
the icerestart property of the rtcofferoptions dictionary is a boolean value which, when true, tells the rtcpeerconnection to start ice renegotiation.
... note: rather than manually creating and submitting an offer with icerestart set to true, you should consider calling the rtcpeerconnection method restartice() instead.
... syntax var options = { icerestart: trueorfalse }; value a boolean value indicating whether or not the rtcpeerconnection should generate new values for the connection's ice-ufrag and ice-pwd values, which will trigger ice renegotiation on the next message sent to the remote peer.
...And 2 more matches

Screen Capture API - Web APIs
a value of true indicates a logical display surface is to be captured.
... mediatracksettings.logicalsurface a boolean value which is true if the video being captured doesn't directly correspond to a single onscreen display area.
... mediatracksupportedconstraints mediatracksupportedconstraints.cursor a boolean which is true if the user agent and device support the mediatrackconstraints.cursor constraint.
...And 2 more matches

SubtleCrypto.exportKey() - Web APIs
to export a key, the key must have cryptokey.extractable set to true.
...*/ window.crypto.subtle.generatekey( { name: "aes-gcm", length: 256, }, true, ["encrypt", "decrypt"] ).then((key) => { const exportbutton = document.queryselector(".raw"); exportbutton.addeventlistener("click", () => { exportcryptokey(key); }); }); pkcs #8 export this example exports an rsa private signing key as a pkcs #8 object.
...*/ window.crypto.subtle.generatekey( { name: "rsa-pss", // consider using a 4096-bit key for systems that require long-term security moduluslength: 2048, publicexponent: new uint8array([1, 0, 1]), hash: "sha-256", }, true, ["sign", "verify"] ).then((keypair) => { const exportbutton = document.queryselector(".pkcs8"); exportbutton.addeventlistener("click", () => { exportcryptokey(keypair.privatekey); }); }); subjectpublickeyinfo export this example exports an rsa public encryption key as a pem-encoded subjectpublickeyinfo object.
...And 2 more matches

ValidityState.patternMismatch - Web APIs
if the field supports the pattern attribute -- which means the <input> is of type text, tel, email, url, password, or search -- and the pattern value is set to a valid regular expression, if the value don't doesn't conform to the constraints set by the pattern value, the patternmismatch property will be true.
... if the values are too long or too short, or contain characters that aren't digits, patternmismatch will be true.
... when true, the element matches the :invalid css pseudo-classes.
...And 2 more matches

WebGL2RenderingContext - Web APIs
webgl2renderingcontext.isquery() returns true if a given object is a valid webglquery object.
... webgl2renderingcontext.issampler() returns true if a given object is a valid webglsampler object.
... webgl2renderingcontext.issync() returns true if the passed object is a valid webglsync object.
...And 2 more matches

Window.customElements - Web APIs
ment', mycustomelement); however, it is usually shortened to something like the following: customelements.define('element-details', class extends htmlelement { constructor() { super(); const template = document .getelementbyid('element-details-template') .content; const shadowroot = this.attachshadow({mode: 'open'}) .appendchild(template.clonenode(true)); } } ); see our web-components-examples repo for more usage examples.
... full support 79firefox full support 63 full support 63 no support 59 — 63disabled disabled from version 59 until version 63 (exclusive): this feature is behind the dom.webcomponents.customelements.enabled preference (needs to be set to true).
...— 59disabled disabled until version 59 (exclusive): this feature is behind the dom.webcomponents.enabled preference (needs to be set to true) and the dom.webcomponents.customelements.enabled preference (needs to be set to true).
...And 2 more matches

XRWebGLLayer.ignoreDepthValues - Web APIs
the read-only xrwebgllayer property ignoredepthvalues is a boolean value which is true if the session has been configured to ignore the values in the depth buffer while rendering the scene.
... syntax let ignoringdepthbuffer = xrwebgllayer.ignoredepthvalues; value a boolean value which is true if the webgl context's depth buffer is being used while computing the locations of points in the 3d world.
... otherwise, if this is true, the depth buffer's values are being used to assist in placing objects in the scene.
...And 2 more matches

ARIA live regions - Accessibility
the possible settings are: false or true.
... aria-atomic="true" ensures that each time the live region is updated, the entirety of the content is announced in full (e.g.
... <div id="clock" role="timer" aria-live="polite" aria-atomic="true"></div> note: as observed, setting/updating the innerhtml again would cause the whole text to be read again, whether or not you set aria-atomic="true", so the above clock example does not work as expected.
...And 2 more matches

ARIA: grid role - Accessibility
aria-multiselectable if aria-multiselectable is set to true, multiple items in the grid can be selected.
... aria-readonly if the user can navigate the grid but not change the value or values of the grid, the aria-readonly should be set to true.
... examples calendar example html <table role="grid" aria-labelledby="calendarheader" aria-readonly=true> <caption id="calendarheader">september 2018</caption> <thead role="rowgroup"> <tr role="row"> <td></td> <th role="columnheader" aria-label="sunday">s</th> <th role="columnheader" aria-label="monday">m</th> <th role="columnheader" aria-label="tuesday">t</th> <th role="columnheader" aria-label="wednesday">w</th> <th role="columnheader" aria-label="thursd...
...And 2 more matches

WAI ARIA Live Regions/API Support - Developer guides
aria-relevant on ancestor element container-busy "true" | "false" | "error" "false" the current changes are not yet complete.
... aria-busy on ancestor element container-atomic "true" | "false" "false" is this change inside a region that should always be presented at once.
... if yes, member-of relation will point to the root of the region (see next section) aria-atomic on ancestor element member-of if container-atomic=true, points to an ancestor accessible object (thus it is actually an accessible relation, not object attribute) not in atomic region if not provided points to the root of the atomic container that this object is in.
...And 2 more matches

Audio and Video Delivery - Developer guides
<source src="audiofile.mp3" type="audio/mpeg"> <source src="audiofile.ogg" type="audio/ogg"> <!-- fallback for non supporting browsers goes here --> <a href="audiofile.mp3">download audio</a> <object width="320" height="30" type="application/x-shockwave-flash" data="flashmediaelement.swf"> <param name="movie" value="flashmediaelement.swf" /> <param name="flashvars" value="controls=true&isvideo=false&file=audiofile.mp3" /> </object> </audio> the process is very similar with video — just remember to set isvideo=true in the flashvars value parameters.
... web audio api var context; var request; var source; try { context = new audiocontext(); request = new xmlhttprequest(); request.open("get","http://jplayer.org/audio/mp3/riomez-01-sleep_together.mp3",true); request.responsetype = "arraybuffer"; request.onload = function() { context.decodeaudiodata(request.response, function(buffer) { source = context.createbuffersource(); source.buffer = buffer; source.connect(context.destination); // auto play source.start(0); // start was previously noteon }); }; request.send(); } catch(e) ...
... to grab the stream from your webcam, first set up a <video> element: <video id="webcam" width="480" height="360"></video> next, if supported connect the webcam source to the video element: if (navigator.mediadevices) { navigator.mediadevices.getusermedia({ video: true, audio: false }) .then(function onsuccess(stream) { var video = document.getelementbyid('webcam'); video.autoplay = true; video.srcobject = stream; }) .catch(function onerror() { alert('there has been a problem retreiving the streams - are you running on file:/// or did you disallow access?'); }); } else { alert('getusermedia is not supported in this browser.'); } to f...
...And 2 more matches

HTML attribute: pattern - HTML: Hypertext Markup Language
if a non-null value doesn't conform to the constraints set by the pattern value, the validitystate object's read-only patternmismatch property will be true.
...if the pattern attribute isn't present, and the value doesn't match the expected syntax for that value type, the validitystate object's read-only typemismatch property will be true.
... if the values are too long or too short, or contain characters that aren't digits, the patternmismatch will be true.
...And 2 more matches

<input type="button"> - HTML: Hypertext Markup Language
disabling and enabling a button to disable a button, simply specify the disabled global attribute on it, like so: <input type="button" value="disable me" disabled> you can enable and disable buttons at run time by simply setting disabled to true or false.
... in this example our button starts off enabled, but if you press it, it is disabled using button.disabled = true.
... hidden code 1 <input type="button" value="enabled"> const button = document.queryselector('input'); button.addeventlistener('click', disablebutton); function disablebutton() { button.disabled = true; button.value = 'disabled'; window.settimeout(function() { button.disabled = false; button.value = 'enabled'; }, 2000); } if the disabled attribute isn't specified, the button inherits its disabled state from its parent element.
...And 2 more matches

<input type="checkbox"> - HTML: Hypertext Markup Language
additional attributes in addition to the common attributes shared by all <input> elements, "checkbox" inputs support the following attributes: attribute description checked boolean; if present, the checkbox is toggled on by default indeterminate a boolean which, if present, indicates that the value of the checkbox is indeterminate rather than true or false value the string to use as the value of the checkbox when submitting the form, if the checkbox is currently toggled on checked a boolean attribute indicating whether or not this checkbox is checked by default (when the page loads).
... indeterminate if the indeterminate attribute is present on the <input> element defining a checkbox, the checkbox's value is neither true nor false, but is instead indeterminate, meaning that it's state cannot be determined or stated in pure binary terms.
...this is set using the htmlinputelement object's indeterminate property via javascript (it cannot be set using an html attribute): inputinstance.indeterminate = true; a checkbox in the indeterminate state has a horizontal line in the box (it looks somewhat like a hyphen or minus sign) instead of a check/tick in most browsers.
...And 2 more matches

spellcheck - HTML: Hypertext Markup Language
it may have the following values: true, which indicates that the element should be, if possible, checked for spelling errors; false, which indicates that the element should not be checked for spelling errors.
...this means that the explicit usage of one of the values true or false is mandatory, and that a shorthand like <textarea spellcheck></textarea> is not allowed.
... the correct usage is <textarea spellcheck="true"></textarea>.
...And 2 more matches

JavaScript data types and data structures - JavaScript
variables in javascript are not directly associated with any particular value type, and any variable can be assigned (and re-assigned) values of all types: let foo = 42; // foo is now a number foo = 'bar'; // foo is now a string foo = true; // foo is now a boolean data and structure types the latest ecmascript standard defines nine types: six data types that are primitives, checked by typeof operator: undefined : typeof instance === "undefined" boolean : typeof instance === "boolean" number : typeof instance === "number" string : typeof instance === "string" bigint : typeof instance === "bigint" symbol ...
... boolean type boolean represents a logical entity and can have two values: true and false.
...for example, +0 === -0 is true.
...And 2 more matches

Details of the object model - JavaScript
if that argument converts to true, the operator returns it.
...javascript provides a shortcut: the instanceof operator tests an object against a function and returns true if the object inherits from the function prototype.
... for example, var f = new foo(); var istrue = (f instanceof foo); for a more detailed example, suppose you have the same set of definitions shown in inheriting properties.
...And 2 more matches

Array.prototype.includes() - JavaScript
the includes() method determines whether an array includes a certain value among its entries, returning true or false as appropriate.
... return value a boolean which is true if the value valuetofind is found within the array (or the part of the array indicated by the index fromindex, if specified).
... examples [1, 2, 3].includes(2) // true [1, 2, 3].includes(4) // false [1, 2, 3].includes(3, 3) // false [1, 2, 3].includes(3, -1) // true [1, 2, nan].includes(nan) // true fromindex is greater than or equal to the array length if fromindex is greater than or equal to the length of the array, false is returned.
...And 2 more matches

BigInt - JavaScript
type information when tested against typeof, a bigint will give "bigint": typeof 1n === 'bigint' // true typeof bigint('1') === 'bigint' // true when wrapped in an object, a bigint will be considered as a normal "object" type: typeof object(1n) === 'object' // true operators the following operators may be used with bigints (or object-wrapped bigints): +, *, -, **, %.
... const expected = 4n / 2n // ↪ 2n const rounded = 5n / 2n // ↪ 2n, not 2.5n comparisons a bigint is not strictly equal to a number, but it is loosely so: 0n === 0 // ↪ false 0n == 0 // ↪ true a number and a bigint may be compared as usual: 1n < 2 // ↪ true 2n > 1 // ↪ true 2 > 2 // ↪ false 2n > 2 // ↪ false 2n >= 2 // ↪ true they may be mixed in arrays and sorted: const mixed = [4n, 6, -12n, 10, 4, 0, 0n] // ↪ [4n, 6, -12n, 10, 4, 0, 0n] mixed.sort() // default sorting behavior // ↪ [ -12n, 0, 0n, 10, 4n, 4, 6 ] mixed.sort((a, b) => a - b) // won't work since...
...1 : 0)) // ↪ [ -12n, 0, 0n, 4n, 4, 6, 10 ] note that comparisons with object-wrapped bigints act as with other objects, only indicating equality when the same object instance is compared: 0n === object(0n) // false object(0n) === object(0n) // false const o = object(0n) o === o // true conditionals a bigint behaves like a number in cases where: it is converted to a boolean: via the boolean function; when used with logical operators ||, &&, and !; or within a conditional test like an if statement.
...And 2 more matches

Generator.prototype.next() - JavaScript
return value an object with two properties: done (boolean) has the value true if the iterator is past the end of the iterated sequence.
...can be omitted when done is true.
...xt() the following example shows a simple generator and the object that the next method returns: function* gen() { yield 1; yield 2; yield 3; } const g = gen(); // "generator { }" g.next(); // "object { value: 1, done: false }" g.next(); // "object { value: 2, done: false }" g.next(); // "object { value: 3, done: false }" g.next(); // "object { value: undefined, done: true }" using next() with a list function* getpage(pagesize = 1, list) { let output = []; let index = 0; while (index < list.length) { output = []; for (let i = index; i < index + pagesize; i++) { if (list[i]) { output.push(list[i]); } } yield output; index += pagesize; } } list = [1, 2, 3, 4, 5, 6, 7, 8] var page = getpage(3, list); /...
...And 2 more matches

Object.prototype.constructor - JavaScript
the value is only read-only for primitive values such as 1, true, and "test".
... let o = {} o.constructor === object // true let o = new object o.constructor === object // true let a = [] a.constructor === array // true let a = new array a.constructor === array // true let n = new number(3) n.constructor === number // true examples displaying the constructor of an object the following example creates a constructor (tree) and an object of that type (thetree).
...only true, 1, and "test" will not be affected (as they have read-only native constructors).
...And 2 more matches

Object.getOwnPropertyDescriptor() - JavaScript
writable true if and only if the value associated with the property may be changed (data descriptors only).
... configurable true if and only if the type of this property descriptor may be changed and if the property may be deleted from the corresponding object.
... enumerable true if and only if this property shows up during enumeration of the properties on the corresponding object.
...And 2 more matches

Proxy - JavaScript
let validator = { set: function(obj, prop, value) { if (prop === 'age') { if (!number.isinteger(value)) { throw new typeerror('the age is not an integer'); } if (value > 200) { throw new rangeerror('the age seems invalid'); } } // the default behavior to store the value obj[prop] = value; // indicate success return true; } }; const person = new proxy({}, validator); person.age = 100; console.log(person.age); // 100 person.age = 'young'; // throws an exception person.age = 300; // throws an exception extending constructor a function proxy could easily extend a constructor with a new constructor.
... let view = new proxy({ selected: null }, { set: function(obj, prop, newval) { let oldval = obj[prop]; if (prop === 'selected') { if (oldval) { oldval.setattribute('aria-selected', 'false'); } if (newval) { newval.setattribute('aria-selected', 'true'); } } // the default behavior to store the value obj[prop] = newval; // indicate success return true; } }); let i1 = view.selected = document.getelementbyid('item-1'); //giving error here, i1 is null console.log(i1.getattribute('aria-selected')); // 'true' let i2 = view.selected = document.getelementbyid('item-2'); console.log(i1.getattribute('aria-selected')); ...
...// 'false' console.log(i2.getattribute('aria-selected')); // 'true' note: even if selected: !null, then giving oldval.setattribute is not a function value correction and an extra property the products proxy object evaluates the passed value and converts it to an array if needed.
...And 2 more matches

Set - JavaScript
examples using the set object let myset = new set() myset.add(1) // set [ 1 ] myset.add(5) // set [ 1, 5 ] myset.add(5) // set [ 1, 5 ] myset.add('some text') // set [ 1, 5, 'some text' ] let o = {a: 1, b: 2} myset.add(o) myset.add({a: 1, b: 2}) // o is referencing a different object, so this is okay myset.has(1) // true myset.has(3) // false, since 3 has not been added to the set myset.has(5) // true myset.has(math.sqrt(25)) // true myset.has('some text'.tolowercase()) // true myset.has(o) // true myset.size // 5 myset.delete(5) // removes 5 from the set myset.has(5) // false, 5 has been removed myset.size // 4, since we just removed one value console...
...1, "b": 2}, {"a": 1, "b": 2} // (key and value are the same here) for (let [key, value] of myset.entries()) console.log(key) // convert set object to an array object, with array.from let myarr = array.from(myset) // [1, "some text", {"a": 1, "b": 2}, {"a": 1, "b": 2}] // the following will also work if run in an html document myset.add(document.body) myset.has(document.queryselector('body')) // true // converting between set and array myset2 = new set([1, 2, 3, 4]) myset2.size // 4 [...myset2] // [1, 2, 3, 4] // intersect can be simulated via let intersection = new set([...set1].filter(x => set2.has(x))) // difference can be simulated via let difference = new set([...set1].filter(x => !set2.has(x))) // iterate set entries with foreach() myset.foreach...
...(function(value) { console.log(value) }) // 1 // 2 // 3 // 4 implementing basic set operations function issuperset(set, subset) { for (let elem of subset) { if (!set.has(elem)) { return false } } return true } function union(seta, setb) { let _union = new set(seta) for (let elem of setb) { _union.add(elem) } return _union } function intersection(seta, setb) { let _intersection = new set() for (let elem of setb) { if (seta.has(elem)) { _intersection.add(elem) } } return _intersection } function symmetricdifference(seta, setb) { let _difference = new set(seta) for (let elem of setb) { if (_difference.has(elem)) { _difference.delete(elem) } else {...
...And 2 more matches

TypedArray.prototype.some() - JavaScript
return value true if the callback function returns a truthy value for any array element; otherwise, false.
... description the some method executes the callback function once for each element present in the typed array until it finds one where callback returns a true value.
... if such an element is found, some immediately returns true.
...And 2 more matches

isNaN() - JavaScript
return value true if the given value is nan; otherwise, false.
... a polyfill for isnan would be (the polyfill leverages the unique never-equal-to-itself characteristic of nan): var isnan = function(value) { var n = number(value); return n !== n; }; examples isnan(nan); // true isnan(undefined); // true isnan({}); // true isnan(true); // false isnan(null); // false isnan(37); // false // strings isnan('37'); // false: "37" is converted to the number 37 which is not nan isnan('37.37'); // false: "37.37" is converted to the number 37.37 which is not nan isnan("37,5"); // true isnan('123abc'); // true: parseint("123abc") is 123 but num...
...ber("123abc") is nan isnan(''); // false: the empty string is converted to 0 which is not nan isnan(' '); // false: a string with spaces is converted to 0 which is not nan // dates isnan(new date()); // false isnan(new date().tostring()); // true // this is a false positive and the reason why isnan is not entirely reliable isnan('blabla'); // true: "blabla" is converted to a number.
...And 2 more matches

Logical NOT (!) - JavaScript
when used with non-boolean values, it returns false if its single operand can be converted to true; otherwise, returns true.
... syntax !expr description returns false if its single operand can be converted to true; otherwise, returns true.
... if a value can be converted to true, the value is so-called truthy.
...And 2 more matches

Strict equality (===) - JavaScript
if both operands are objects, return true only if they refer to the same object.
... if both operands are null or both operands are undefined, return true.
... booleans must be both true or both false.
...And 2 more matches

function* - JavaScript
the done property of the object returned by it will be set to true).
... when a generator is finished, subsequent next() calls will not execute any of that generator's code, they will just return an object of this form: {value: undefined, done: true}.
... examples simple example function* idmaker() { var index = 0; while (true) yield index++; } var gen = idmaker(); console.log(gen.next().value); // 0 console.log(gen.next().value); // 1 console.log(gen.next().value); // 2 console.log(gen.next().value); // 3 // ...
...And 2 more matches

while - JavaScript
the while statement creates a loop that executes a specified statement as long as the test condition evaluates to true.
...if this condition evaluates to true, statement is executed.
... statement an optional statement that is executed as long as the condition evaluates to true.
...And 2 more matches

Strict mode - JavaScript
the inverse is also true: non-strict plus strict looks non-strict.
... (function() { 'use strict'; false.true = ''; // typeerror (14).sailing = 'home'; // typeerror 'with'.you = 'far away'; // typeerror })(); simplifying variable uses strict mode simplifies how variable names map to particular variable definitions in the code.
...thus for a strict mode function, the specified this is not boxed into an object, and if unspecified, this will be undefined: 'use strict'; function fun() { return this; } console.assert(fun() === undefined); console.assert(fun.call(2) === 2); console.assert(fun.apply(null) === null); console.assert(fun.call(undefined) === undefined); console.assert(fun.bind(true)() === true); that means, among other things, that in browsers it's no longer possible to reference the window object through this inside a strict mode function.
...And 2 more matches

boolean - XPath
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the boolean function evaluates an expression and returns true or false.
... returns boolean true or false after evaluating expression.
...otherwise, it evaluates true.
...And 2 more matches

Communicating With Other Scripts - Archive of obsolete content
this is true as long as both context scripts have direct access to the same dom objects.
...ent script "content-script.js" adds an event listener to the button, that sends a custom event containing a message: var messenger = document.getelementbyid("message"); messenger.addeventlistener("click", sendcustomevent, false); function sendcustomevent() { var greeting = {"greeting" : "hello world"}; var event = document.createevent('customevent'); event.initcustomevent("addon-message", true, true, greeting); document.documentelement.dispatchevent(event); } finally, the page script "page-script.js" listens for the message and logs the greeting to the web console: window.addeventlistener("addon-message", function(event) { console.log(event.detail.greeting); }, false); after firefox 30: clone the message object this technique depends on being able to share the message payload...
...page script's scope using the global cloneinto() function: var messenger = document.getelementbyid("message"); messenger.addeventlistener("click", sendcustomevent, false); function sendcustomevent() { var greeting = {"greeting" : "hello world"}; var cloned = cloneinto(greeting, document.defaultview); var event = document.createevent('customevent'); event.initcustomevent("addon-message", true, true, cloned); document.documentelement.dispatchevent(event); } messaging from page script to content script sending messages using custom dom events from the page script to the content script is just the same, but in reverse.
...ain.org/talk.html", contentscriptfile: data.url("listen.js") }); the web page "talk.html" creates and dispatches a custom dom event, using initcustomevent()'s detail parameter to supply the payload: <!doctype html> <html> <head></head> <body> <script> function sendmessage() { var event = document.createevent('customevent'); event.initcustomevent("addon-message", true, true, { hello: 'world' }); document.documentelement.dispatchevent(event); } </script> <button onclick="sendmessage()">send message</button> </body> </html> finally, the content script "listen.js" listens for the new event and retrieves the payload from its detail attribute: window.addeventlistener("addon-message", function(event) { console.log(json.stringify(event.det...

simple-prefs - Archive of obsolete content
hidden a boolean value which, if present and set to true, means that the preference won't appear in the add-ons manager interface, so users of your add-on won't be able to see or alter it.
... { "name": "myhiddeninteger", "type": "integer", "title": "how many?", "hidden": true } your add-on's code will still be able to access and modify it, just like any other preference you define.
... { "description": "does it have tentacles?", "type": "bool", "name": "hastentacles", "value": true, "title": "tentacles" } boolint displayed as a checkbox and stores an integer.
... a boolint is presented to the user as a checkbox, but instead of storing true or false, the "on" or "off" checkbox states are mapped to integers using "on" or "off" properties in the specification.

Appendix E: DOM Building and Insertion (HTML & XUL) - Archive of obsolete content
attribute("value", "testvalue"); newitem.setattribute("label", "another popup menu item"); menupopup.appendchild(newitem); }; var jsontemplatebtn = ["xul:toolbarbutton", { id: "mytestbutton", class: "toolbarbutton-1", type: "menu", label: "test button label", tooltiptext: "test button tooltip", removable: true, key: "mytestbutton123" }, [ "menupopup", { onpopupshowing: function(event) { addentrytopopup(this, document, window); } }, null ] ]; var capturednodes = {}; var toolbox = doc.getelementbyid("navigator-toolbox"); var palette = toolbox.palette; var domfragment = jsontodom(jsontemplatebtn, document, capture...
... * @param {boolean} allowstyle if true, allow <style> nodes and * style attributes in the parsed fragment.
... * @param {boolean} isxml if true, parse the fragment as xml.
... document.body.appendchild(parsehtml(document, xhr.responsetext, true, xhr.channel.uri)); see also displaying web content in an extension without security issues how to create a dom tree node.textcontent node.appendchild() element.setattribute() document.createelement() document.createtextnode() original document information author(s): kris maglione last updated date: 2011-08-08 ...

Supporting per-window private browsing - Archive of obsolete content
to do this, observe the last-pb-context-exiting notification and set the data field of the nsisupportsprbool subject to true.
...observer-service;1"] .getservice(components.interfaces.nsiobserverservice); os.addobserver(function (asubject, atopic, adata) { asubject.queryinterface(components.interfaces.nsisupportsprbool); // if another extension has not already canceled entering the private mode if (!asubject.data) { /* you should display some user interface here */ asubject.data = true; // cancel the operation } }, "last-pb-context-exiting", false); forcing a channel into private mode usually, network channels inherit the privacy status of the document that created them, which means that they work correctly most of the time.
...var channel = services.io.newchannel("http://example.org", null, null); channel.queryinterface(components.interfaces.nsiprivatebrowsingchannel); channel.setprivate(true); // force the channel to be loaded in private mode similarly, xmlhttprequest objects created via createinstance(ci.nsixmlhttprequest) will often require explicit adjustment, since they have no context from which to derive a privacy status.
... var xhr = components.classes["@mozilla.org/xmlextras/xmlhttprequest;1"].createinstance(components.interfaces.nsixmlhttpreqeust); var channel = xhr.channel.queryinterface(components.interfaces.nsiprivatebrowsingchannel); channel.setprivate(true); ...

allowevents - Archive of obsolete content
« xul reference home allowevents type: boolean if true, events are passed to children of the element.
...by setting the allowevents attribute to true, this special behavior is disabled, and the events are targeted the same as other elements.
...instead, the allowevents may be set to true on a descendant instead.
...for the latter, the allowevents attribute is set to true to have a click on the child button receive events instead of targeting all events at the menu.

spellcheck - Archive of obsolete content
« xul reference home spellcheck type: boolean if true, spell checking is enabled by default for the text box; if false, spell checking is disabled by default.
... if not specified, this defaults to false the html the spellcheck attribute uses values of true or false (you cannot simply add the spellcheck attribute to a given element): <!-- spellcheck everything!
... --> <input type="text" spellcheck="true" /><br /> <textarea spellcheck="true"></textarea> <div contenteditable="true" spellcheck="true">i am some content</div> <!-- spellcheck nothing!
... --> <input type="text" spellcheck="false" /><br /> <textarea spellcheck="false"></textarea> <div contenteditable="true" spellcheck="false">i am some content</div> you can use spellcheck on input, textarea, and contenteditable elements.

command - Archive of obsolete content
ctrlkey read only boolean true if the control key was down when the event was fired.
... shiftkey read only boolean true if the shift key was down when the event was fired.
... altkey read only boolean true if the alt key was down when the event was fired.
... metakey read only boolean true if the meta key was down when the event was fired.

Getting File Information - Archive of obsolete content
the following four methods return true or false: nsifile.isreadable() - returns true if the file can be read from.
... nsifile.iswritable() - returns true if the file can be written to.
... nsifile.isexecutable() - returns true if the file can be executed.
... nsifile.ishidden() - returns true if the file is hidden.

appendNotification - Archive of obsolete content
if the return value from this function is not true, then the notification is closed.
... isdefault - if true, this is the default button.
... .getmostrecentwindow("navigator:browser"); } if (typeof gbrowser === "undefined") { //if there is no gbrowser defined, get it var gbrowser = window.gbrowser; } function testnotificationbutton1callback(thenotification, buttoninfo, eventtarget) { window.alert("button 1 pressed"); //prevent notification from closing: return true; }; function testnotificationbutton2callback(thenotification, buttoninfo, eventtarget) { window.alert("button 2 pressed"); //do not prevent notification from closing: }; function testnotificationcallback(reason) { window.alert("reason is: " + reason); }; let notifybox = gbrowser.getnotificationbox(); let buttons = []; let button1 = { ...
... popup: null }; buttons.push(button1); let button2 = { isdefault: true, accesskey: "2", label: "button 2", callback: testnotificationbutton2callback, type: "", // if a popup, then must be: "menu-button" or "menu".

Floating Panels - Archive of obsolete content
a floating panel can be created using the panel element with at least two additional attributes as in the following example: <panel id="tools-panel" noautohide="true" titlebar="normal"> <label control="name" value="name:"/> <textbox id="name"/> </panel> the noautohide attribute is used to indicate that the panel is not temporary.
... when set to true, the popup will not close when the user clicks outside of it, nor when the user presses the escape key.
...a label for the titlebar may be set using the label attribute, as in the following example: <panel id="info-panel" noautohide="true" titlebar="normal" label="image properties"> closing a floating panel unlike other panels, a floating panel does not close when clicking outside of it.
...<panel id="info-panel" noautohide="true" titlebar="normal" label="image properties" close="true"> the hidepopup method may be used to manually close a popup.

Adding Event Handlers - Archive of obsolete content
to show errors in chrome javascript, it is necessary to change the preference javascript.options.showinconsole to true.
...by setting this value to true, non-standard, poorly written, or syntax prone to cause logic errors are logged to the javascript console.
...the syntax is as follows: example 3 : source view <button id="okbutton" label="ok"/> <script> function buttonpressed(event){ alert('button was pressed!'); } var button = document.getelementbyid("okbutton"); button.addeventlistener('command', buttonpressed, true); </script> the getelementbyid() function returns the element with a given id, in this case the button.
...finally, the last argument should be true for capturing listeners.

button - Archive of obsolete content
autocheck type: boolean if this attribute is true or left out, the checked state of the button will be switched each time the button is pressed.
...when autocheck is true, the button type should be "checkbox" or "radio".
...do not set the attribute to true, as this will suggest you can set it to false to enable the element again, which is not the case.
... open type: boolean for the menu type buttons, the open attribute is set to true when the menu is open.

dialog - Archive of obsolete content
ext/css"?> <dialog id="donothing" title="dialog example" xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul" buttons="accept,cancel" buttonlabelcancel="cancel" buttonlabelaccept="save"> <dialogheader title="options" description="my preferences"/> <groupbox> <caption label="colour"/> <radiogroup> <radio label="red"/> <radio label="green" selected="true"/> <radio label="blue"/> </radiogroup> <label value="nickname"/> <textbox/> </groupbox> </dialog> attributes activetitlebarcolor type: color string specify background color of the window's titlebar when it is active (foreground).
... buttondisabledaccept type: boolean if true, the accept button is disabled.
...if it is set to true any changes to settings are supposed to be applied immediately.
...the default setting of browser.preferences.instantapply currently is true on linux and mac os and false on windows (which however might or might not change soon, see bug 738797 and bug 1037225).

listitem - Archive of obsolete content
cesskey, checked, command, crop, current, disabled, image, label, preference, selected, tabindex, type, value properties accesskey, accessible, checked, control, crop, current, disabled, image, label, selected, tabindex, value style classes listitem-iconic examples <listbox id="thelist"> <listitem label="ruby"/> <listitem label="emerald"/> <listitem label="sapphire" selected="true"/> <listitem label="diamond"/> </listbox> attributes accesskey type: character this should be set to a character that is used as a shortcut key.
...for example, for a menuitem in a menu you can add the following css rule when you want to use the value none: menupopup > menuitem, menupopup > menu { max-width: none; } current type: boolean this attribute will be set to true if the listitem is the current item.
...do not set the attribute to true, as this will suggest you can set it to false to enable the element again, which is not the case.
... selected type: boolean this property's value is true if this element is selected, or false if it is not.

radio - Archive of obsolete content
attributes accesskey, command, crop, disabled, focused, group, image, label, selected, tabindex, value properties accesskey, accessibletype, control, crop, disabled, image, label, radiogroup, selected, tabindex, value examples <radiogroup> <radio id="orange" label="red" accesskey="r"/> <radio id="violet" label="green" accesskey="g" selected="true"/> <radio id="yellow" label="blue" accesskey="b" disabled="true"/> </radiogroup> attributes accesskey type: character this should be set to a character that is used as a shortcut key.
...do not set the attribute to true, as this will suggest you can set it to false to enable the element again, which is not the case.
... focused type: boolean this attribute is true if the element is focused.
... selected type: boolean this property's value is true if this element is selected, or false if it is not.

radiogroup - Archive of obsolete content
attributes disabled, focused, preference, tabindex, value properties accessibletype, disabled, focuseditem, itemcount, selectedindex, selecteditem, tabindex, value methods appenditem, checkadjacentelement, getindexofitem, getitematindex, insertitemat, removeitemat examples <radiogroup> <radio id="orange" label="red"/> <radio id="violet" label="green" selected="true"/> <radio id="yellow" label="blue"/> </radiogroup> attributes disabled type: boolean indicates whether the element is disabled or not.
...do not set the attribute to true, as this will suggest you can set it to false to enable the element again, which is not the case.
... focused type: boolean this attribute is true if the element is focused.
...if the argument dir is true, the next radio button is selected.

toolbar - Archive of obsolete content
e, currentset, firstpermanentchild, lastpermanentchild, toolbarname, toolboxid methods insertitem style classes chromeclass-toolbar examples <toolbox> <toolbar id="nav-toolbar"> <toolbarbutton id="nav-users" accesskey="u" label="users"/> <toolbarbutton id="nav-groups" accesskey="p" label="groups"/> <toolbarbutton id="nav-events" accesskey="e" label="events" disabled="true"/> </toolbar> </toolbox> attributes autohide type: boolean when set to true, the toolbar will be invisible unless the alt key is pressed by the user.
... customizable not in seamonkey 1.x type: boolean set this attribute to true on toolbars that can be customized.
... grippyhidden seamonkey only type: boolean when set to true, the grippy will be hidden.
...if the second argument is null, but the beforepermanent argument is true, the item is added to the beginning of the toolbar before the first permanent item.

toolbarbutton - Archive of obsolete content
autocheck type: boolean if this attribute is true or left out, the checked state of the button will be switched each time the button is pressed.
...when autocheck is true, the button type should be "checkbox" or "radio".
...do not set the attribute to true, as this will suggest you can set it to false to enable the element again, which is not the case.
... open type: boolean for the menu type buttons, the open attribute is set to true when the menu is open.

Debugging a XULRunner Application - Archive of obsolete content
/* debugging prefs */ pref("browser.dom.window.dump.enabled", true); pref("javascript.options.showinconsole", true); pref("javascript.options.strict", true); pref("nglayout.debug.disable_xul_cache", true); pref("nglayout.debug.disable_xul_fastload", true); don't forget to change these preferences back to their defaults when you've finished debugging; leaving them as-is can significantly harm performance and usability.
...this will only work if the pref pref("browser.dom.window.dump.enabled", true) is enabled.
...to show errors in chrome javascript, the pref pref("javascript.options.showinconsole", true) must be set.
... debuggerserver.addbrowseractors("myxulrunnerappwindowtype"); } debuggerserver.openlistener(6000); for xulrunner version 37+ the code to enable the debugger has changed: components.utils.import('resource://gre/modules/devtools/dbg-server.jsm'); if (!debuggerserver.initialized) { debuggerserver.init(); debuggerserver.addbrowseractors(); debuggerserver.allowchromeprocess = true; } let dbglistener=debuggerserver.createlistener(); dbglistener.portorpath=6000; dbglistener.open(); add the following to your prefs.js: (in recent ffox, edit about:config instead) pref("devtools.debugger.remote-enabled", true); in firefox, go to tools > web developer > connect...

NPFullPrint - Archive of obsolete content
syntax typedef struct _npfullprint { npbool pluginprinted; /* true: print fullscreen */ npbool printone; /* true: print one copy */ /* to default printer */ void* platformprint; /* platform-specific */ } npfullprint; fields the data structure has the following fields: pluginprinted determines whether the plug-in prints in full-page mode.
... values: true: plug-in takes complete control of the printing process and prints full-page.
... true: print single copy of page to the default printer.
...if you want the plug-in to take complete control of the printing process, it should print the full page and set the field pluginprinted to true before returning.

-ms-accelerator - Archive of obsolete content
initial valuefalseapplies toall elementsinheritednocomputed valueas specifiedanimation typediscrete syntax /* the object is not a keyboard shortcut (the default) */ -ms-accelerator: false /* the object is a keyboard shortcut */ -ms-accelerator: true values false the object is not a keyboard shortcut.
... true the object is a keyboard shortcut.
... formal syntax false | true examples this example uses the -ms-accelerator attribute in a <u> element to specify that the "n" in the <label> element is a keyboard shortcut.
... <!doctype html> <html> <head> <title>accelerator</title> </head> <body> <label for="oname"><u style="-ms-accelerator: true; accelerator: true">n</u>ame: </label> <input type="text" id="oname" size="25" accesskey="n" value="your name here" /> </body> </html> specifications not part of any specification.

Reference - Archive of obsolete content
--maian 05:41, 22 september 2005 (pdt) this is true.
...which basicly says function != object alert(function instanceof object) //true alert(object instanceof function) //true alert(math instanceof object) //true alert(math instanceof function) //false note that the methods and properties for object in this reference are also available for function and vice versa ...
...the reason object instanceof function evaluates to true is because object can be used as a constructor function.
...this is why math instanceof object evaluates to true, but math instanceof function does not.

Describing microformats in JavaScript - Archive of obsolete content
standard attributes are: plural a boolean value indicating that, if true indicates that the property can have multiple values.
...this is only used if virtual is true.
...the adr microformat is defined as follows: var adr_definition = { mfversion: 0.8, mfobject: adr, classname: "adr", properties: { "type" : { plural: true, types: ["work", "home", "pref", "postal", "dom", "intl", "parcel"] }, "post-office-box" : { }, "street-address" : { plural: true }, "extended-address" : { }, "locality" : { }, "region" : { }, "postal-code" : { }, "country-name" : { } } }; the properties are quite simple here.
...since the plural property is true, multiple types can be specified.

RDF in Mozilla FAQ - Archive of obsolete content
by setting // ablocking to true, we could force it to be synchronous, but this // is generally a bad idea, because your ui will completely lock up!
...refer to mozilla rdf back end architecture ds.assert(homepage, fv_quality, value, true); ds.unassert(homepage, fv_quality, value, true); how do i save back changes to an rdf/xml datasource?
...if (bookmarks.hasassertion( rdf.getresource("http://home.netscape.com/nc-rdf#bookmarksroot"), rdf.getresource("http://home.netscape.com/nc-rdf#child"), rdf.getresource("http://home.netscape.com/nc-rdf#personaltoolbarfolder"), true) { // ...
...(shut down mozilla first since it overwrites your preferences file when you quit.) user_pref("signed.applets.codebase_principal_support", true); mozilla will ask you if you want to grant the scripts in duplicates.xul permission to access xpconnect; respond in the affirmative.

Common causes of memory leaks in extensions - Extensions
however, while this is still true, the window.setinterval() in the example originates from the outer chrome window (browser.xul) and not from the content window.
... window.addeventlistener("leaky", leakref, true); // the following line still fails to avoid the leak, as usecapture differs // and removeeventlistener will not remove anything.
... unload(function() window.removeeventlistener("leaky", leakref, true), window); } note: the unload() function is an external function which can be added in your add-on to easily provide a way to undo changes upon unloading of your add-on or a specific part/object.
...you may also specify ownsweak = true in the call to nsiobserverservice.addobserver(), but that might require you to properly implement weak references as well.

Paddle and keyboard controls - Game development
the same pattern is true for the second listener: keyup events will fire the keyuphandler() function (when the keys stop being pressed).
... add these to your code now, below the addeventlistener() lines: function keydownhandler(e) { if(e.key == "right" || e.key == "arrowright") { rightpressed = true; } else if(e.key == "left" || e.key == "arrowleft") { leftpressed = true; } } function keyuphandler(e) { if(e.key == "right" || e.key == "arrowright") { rightpressed = false; } else if(e.key == "left" || e.key == "arrowleft") { leftpressed = false; } } when we press a key down, this information is stored in a variable.
... the relevant variable in each case is set to true.
...if the left cursor is pressed, then the leftpressed variable is set to true, and when it is released, the leftpressed variable is set to false.

Visual typescript game engine - Game development
*/ private addson: addson = [ { name: "cache", enabled: true, scriptpath: "externals/cacheinit.ts", }, { name: "hackertimer", enabled: true, scriptpath: "externals/hack-timer.js", }, { name: "dragging", enabled: true, scriptpath: "externals/drag.ts", }, ]; /** * @description this is main coordinary types of positions * can be "diametric-fullscreen" or "frame".
... * in other way keep it 'true'.
... */ private appusebroadcaster: boolean = false; /** * possible variant by default : * "register", "login" */ private startuphtmlform: string = "register"; private gamelist: any[]; /** * implement default gameplay variable's */ private defaultgameplaylevelname: string = "level1"; private autostartgameplay: boolean = true; start the dependency system from app.ts the first game template is platformer.
... this.networkdeeplogs = false; this.rtcserverport = 12034; this.rtc3serverport = 12034; this.connectorport = 1234; this.domain = "192.168.0.14"; this.masterserverkey = "multi-platformer-sever1.maximum"; this.protocol = "http"; this.issecure = false; this.appuseaccountssystem = true; this.appusevideochat = true; this.databasename = "masterdatabase"; this.databaseroot = "mongodb://localhost:27017"; - the running server is easy : npm run rtc with this cmd: npm run rtc we run server.js and connector.ts websocket.

Video and Audio APIs - Learn web development
next, let's look at our button icons: @font-face { font-family: 'heydingscontrolsregular'; src: url('fonts/heydings_controls-webfont.eot'); src: url('fonts/heydings_controls-webfont.eot?#iefix') format('embedded-opentype'), url('fonts/heydings_controls-webfont.woff') format('woff'), url('fonts/heydings_controls-webfont.ttf') format('truetype'); font-weight: normal; font-style: normal; } button:before { font-family: heydingscontrolsregular; font-size: 20px; position: relative; content: attr(data-icon); color: #aaa; text-shadow: 1px 1px 0px black; } first of all, at the top of the css we use a @font-face block to import a custom web font.
...the htmlmediaelement.paused property returns true if the media is paused, which is any time the video is not playing, including when it is set at 0 duration after it first loads.
...this returns a boolean true/false result.
... can you work out a way to turn the timer inner <div> element into a true seek bar/scrobbler — i.e., when you click somewhere on the bar, it jumps to that relative position in the video playback?

Basic math in JavaScript — numbers and operators - Learn web development
this is especially true when we are learning to program javascript (or any other language for that matter) — so much of what we do relies on processing numerical data, calculating new values, and so on, that you won't be surprised to learn that javascript has a full-featured set of math functions available.
...you can see that it's been incremented if you return the variable value again: num1; the same is true of -- : try the following let num2 = 6; num2--; num2; note: you can make the browser do it the other way round — increment/decrement the variable then return the value — by putting the operator at the start of the variable instead of the end.
... comparison operators sometimes we will want to run true/false tests, then act accordingly depending on the result of that test — to do this we use comparison operators.
... if you try entering some of these values in a console, you'll see that they all return true/false values — those booleans we mentioned in the last article.

Starting our Svelte Todo list app - Learn web development
</label> </h2> <input type="text" id="todo-0" autocomplete="off" class="input input__lg" /> <button type="submit" disabled="" class="btn btn__primary btn__lg"> add </button> </form> <!-- filter --> <div class="filters btn-group stack-exception"> <button class="btn toggle-btn" aria-pressed="true"> <span class="visually-hidden">show</span> <span>all</span> <span class="visually-hidden">tasks</span> </button> <button class="btn toggle-btn" aria-pressed="false"> <span class="visually-hidden">show</span> <span>active</span> <span class="visually-hidden">tasks</span> </button> <button class="btn toggle-btn" aria-pressed="false"> <span ...
...for example: <button class="btn toggle-btn" aria-pressed="true"> <span class="visually-hidden">show</span> <span>all</span> <span class="visually-hidden">tasks</span> </button> here, aria-pressed tells assistive technology (like screen readers) that the button can be in one of two states: pressed or unpressed.
...setting a value of true means that the button is pressed by default.
... body { font-size: 1.9rem; line-height: 1.31579; } } /*end resets*/ /* global styles */ .form-group > input[type="text"] { display: inline-block; margin-top: 0.4rem; } .btn { padding: 0.8rem 1rem 0.7rem; border: 0.2rem solid #4d4d4d; cursor: pointer; text-transform: capitalize; } .btn.toggle-btn { border-width: 1px; border-color: #d3d3d3; } .btn.toggle-btn[aria-pressed="true"] { text-decoration: underline; border-color: #4d4d4d; } .btn__danger { color: #fff; background-color: #ca3c3c; border-color: #bd2130; } .btn__filter { border-color: lightgrey; } .btn__primary { color: #fff; background-color: #000; } .btn__primary:disabled { color: darkgrey; background-color:#565656; } .btn-group { display: flex; justify-content: space-between; } .btn-grou...

TypeScript support in Svelte - Learn web development
typescript also has some disadvantages: not true static typing: types are only checked at compile time, and they are removed from the generated code.
... no replacement for automatic tests: even though types might help you catch several bugs, typescript is not a true replacement for a comprehensive suite of automated tests.
...this is how the contents will end up: // stores.ts import { writable } from 'svelte/store' import { localstore } from './localstore.js' import type { todotype } from './types/todo.type' export const alert = writable('welcome to the to-do list app!') const initialtodos: todotype[] = [ { id: 1, name: 'visit mdn web docs', completed: true }, { id: 2, name: 'complete the svelte tutorial', completed: false }, ] export const todos = localstore('mdn-svelte-todo', initialtodos) remember to update the import statements in app.svelte, alert.svelte, and todos.svelte.
...// save also to local storage as a string return set(value) }, update } } and thanks to generic type inference, typescript already knows that our $todos store should contain an array of todotype: once again, if we wanted to be explicit about it, we could do so in the stores.ts file like this: const initialtodos: todotype[] = [ { id: 1, name: 'visit mdn web docs', completed: true }, { id: 2, name: 'complete the svelte tutorial', completed: false }, ] export const todos = localstore<todotype[]>('mdn-svelte-todo', initialtodos) that will do for our brief tour of typescript generics.

Working with Svelte stores - Learn web development
update the <script> section of your alert.svelte component like so: <script> import { ondestroy } from 'svelte' import { alert } from '../stores.js' export let ms = 3000 let visible let timeout const onmessagechange = (message, ms) => { cleartimeout(timeout) if (!message) { // hide alert if message is empty visible = false } else { visible = true // show alert if (ms > 0) timeout = settimeout(() => visible = false, ms) // and hide it after ms milliseconds } } $: onmessagechange($alert, ms) // whenever the alert store or the ms props changes run onmessagechange ondestroy(()=> cleartimeout(timeout)) // make sure we clean-up the timeout </script> and update t...
...if it is not empty, we set visible to true and use the settimeout() function to clear the alert after ms milliseconds.
... update your app.svelte file like this: <script> import todos from './components/todos.svelte' import alert from './components/alert.svelte' import { todos } from './stores.js' $todos = [ { id: 1, name: 'create a svelte starter app', completed: true }, { id: 2, name: 'create your first component', completed: true }, { id: 3, name: 'complete the rest of the tutorial', completed: false } ] </script> <alert /> <todos bind:todos={$todos} /> try it out; everything should work.
... update stores.js like so: import { writable } from 'svelte/store' import { localstore } from './localstore.js' export const alert = writable('welcome to the to-do list app!') const initialtodos = [ { id: 1, name: 'visit mdn web docs', completed: true }, { id: 2, name: 'complete the svelte tutorial', completed: false }, ] export const todos = localstore('mdn-svelte-todo', initialtodos) using localstore('mdn-svelte-todo', initialtodos), we are configuring the store to save the data in web storage under the key mdn-svelte-todo.

Gecko info for Windows accessibility vendors
finally, true descriptions are now exposed with the text "description: " prepending the description.
... hresult get_computedstyle( /* [in] */ unsigned short maxstyleproperties, /* [in] */ boolean usealternateview, // if true, returns properties for media // as set in nsidomdocument::set_alternateviewmediatypes /* [out] */ bstr *styleproperties, /* [out] */ bstr *stylevalues, /* [out] */ unsigned short *numstyleproperties); a variation on this method is get_computedstyleforproperties, which lets turns the styleproperties array into an [in] parameter, letting you specify only those style properties you're inter...
... hresult get_computedstyleforproperties( /* [in] */ unsigned short numstyleproperties, /* [in] */ boolean usealternateview, // if true, returns properties for media // as set in nsidomdocument::set_alternateviewmediatypes /* [in] */ bstr *styleproperties, /* [out] */ bstr *stylevalues); to scroll the document in order make a specific element visible in the window, use scrollto(boolean placetopleft).
... if the parameter placetopleft is true the document will be scrolled so that the element is placed in the top left corner of the window.

Debugging JavaScript
to enable it, go to about:config in the url bar and set devtools.chrome.enabled to true, or set the "enable chrome and add-on debugging" option in the developer tool settings.
... go to about:config and set the following two prefs: devtools.chrome.enabled: true devtools.debugger.remote-enabled: true after you restart the browser, you can access the browser debugger through tools > web developer > browser toolbox.
... strict code checking if you set the pref javascript.options.strict to true, the javascript engine gives you more types of warnings on the error console, most of which hint at code bugs that are easy to oversee or even bad syntax.
... to see anything, you need to set the pref browser.dom.window.dump.enabled to true, e.g.

Creating Custom Events That Can Pass Data
this remains true even if you mark you extension code as "internal".
...var event = document.createevent("nsdommyevent"); event.initevent("nsdommyevent", true, true); window.dispatchevent(event); dispatching your event in c++ the following shows how to dispatch your event in c++: nscomptr<nsiwindowwatcher> wwatcher (do_getservice("@mozilla.org/embedcomp/window-watcher;1")); // the window watcher will be able to give me a handle to the window nscomptr<nsidomwindow> awindow; // a handle to the window nscomptr<nsidomdocument> adoc; // a handle to the document nscomptr<nsidomeventtarget> twindow; // the target window (really the same window as above but you need // a different inteface :/ nscomptr<nsidomevent> event; //this will be the event ...
... docevent->createevent(ns_literal_string("nsdommyevent"), getter_addrefs(event)); //create the event event->initevent(ns_literal_string("nsdommyevent"), pr_true, pr_true); //initialize it twindow = do_queryinterface(awindow); //use the window for a target.
... prbool defaultactionenabledwin; prbool defaultactionenableddoc; nscomptr<nsiprivatedomevent> privevt(do_queryinterface(event)); privevt->settrusted(pr_true); //make the event trusted twindow->dispatchevent(event, &defaultactionenabledwin); //dispatch it (i.e.

Performance best practices for Firefox front-end engineers
hide your panels if you’re adding a new xul <xul:popup> or <xul:panel> to a document, set the hidden attribute to true by default.
... you can activate paint flashing for browser chrome by setting nglayout.debug.paint_flashing_chrome to true.
... you can activate paint flashing for web content by setting nglayout.debug.paint_flashing to true.
...for example: services.scriptloader.loadsubscriptwithoptions(myscripturl, { async: true }).then(() => { console.log("script at " + myscripturl + " loaded asynchronously!"); }); ...

HTMLIFrameElement.setVisible()
if the visible state is set to true, it means that the browser <iframe> should have high priority over the resources needed to render and handle its content.
... as an example, if the content of a browser <iframe> uses the window.requestanimationframe method and if the visible state is set to true, window.requestanimationframe will be called as often as necessary.
... parameters visible a boolean that indicates if the browser <iframe> visible state is true or false.
... examples var browser = document.queryselector('iframe'); browser.setvisible(true); specification not part of any specification.

IPDL Tutorial
the generated c++ will result in something containing: class pplugininstanceparent { public: typedef mozpromise<tuple<bool, bool> responserejectreason, true> asyncinitpromise; typedef mozpromise<bool, responserejectreason, true> otherfunctionpromise; void sendasyncinit(mozilla::ipc::resolvecallback<tuple<bool, bool>>&& aresolve, mozilla::ipc::rejectcallback&& areject); refptr<asyncinitpromise> sendasyncinit(); void sendotherfunction(mozilla::ipc::resolvecallback<bool>&& aresolve, mozilla::ipc::reje...
... return true; } ...
...}; virtual pexamplechild* toplevelchild::allocpexample() { refptr<examplechild*> actor = new examplechild(); return actor.forget(); } virtual bool toplevelchild::deallocpexample(pexamplechild* actor) { ns_release(static_cast<examplechild*>(actor)); return true; } if an object that implements a protocol can't be constructed inside allocpfoo, has been previously constructed and doesn't require an ipdl connection throughout its lifetime, or implements a refcounted protocol where the first form of constructor is not available, there is a second form of sendpfooconstructor which can be used: class examplechild { public: void dosomething() { a...
... for a protocol pfoo managed by pmanager, that manages pmanagee, the methods are pmanager* pfoo::manager() const infallibletarray<pmanagee*> pfoo::managedpmanagee(); void pfoo::managedpmanagee(infallibletarray<pmanagee*>&); shutdown and error handling the c++ methods which implement ipdl messages return bool: true for success, and false for catastrophic failure.

AddonListener
void onenabling( in addon addon, in boolean needsrestart ) parameters addon the addon that is being enabled needsrestart true if an application restart is necessary for the change to take effect onenabled() called when an add-on has been enabled.
... void ondisabling( in addon addon, in boolean needsrestart ) parameters addon the addon that is being disabled needsrestart true if an application restart is necessary for the change to take effect ondisabled() called when an add-on has been disabled.
... void oninstalling( in addon addon, in boolean needsrestart ) parameters addon the addon that is being installed needsrestart true if an application restart is necessary for the change to take effect oninstalled() called when an add-on has been installed.
... void onuninstalling( in addon addon, in boolean needsrestart ) parameters addon the addon that is being uninstalled needsrestart true if an application restart is necessary for the change to take effect onuninstalled() called when an add-on has been uninstalled.

PopupNotifications.jsm
method overview void locationchange(); notification getnotification(id, browser); void remove(notification); notification show(browser, id, message, anchorid, mainaction, secondaryactions, options); properties attribute type description ispanelopen boolean returns true if the notification panel is currently visible, false if it is not.
...if true, the notification will remain visible even if the browser navigates to a different location.
... nevershow notifications with this parameter set to true will be removed when they would have otherwise been dismissed (i.e.
... removeondismissal notifications with this parameter set to true will be removed when they would have otherwise been dismissed (that is, any time the popup is closed due to user interaction).

PromiseWorker.jsm
complete example following example provides resolvetest function, which resolves the promise when true is passed as an argument, and rejects the promise when false is passed as an argument, and post messages to it from the main thread.
...nction() { self.close(); }; worker.log = function(...args) { dump('worker: ' + args.join(' ') + '\n'); }; self.addeventlistener('message', msg => worker.handlemessage(msg)); // start - my functionalities function resolvetest(shouldresolve) { if (shouldresolve) { return 'you sent to promiseworker argument of: `' + shouldresolve + '`'; } else { throw new error('you passed in a non-true value for shouldresolve argument and therefore this will reject the main thread promise'); } } main thread file bootstrap.js const { utils: cu } = components; const { basepromiseworker } = cu.import('resource://gre/modules/promiseworker.jsm', {}); var myworker = new basepromiseworker('chrome://path/to/content/myworker.js'); var promise_domyfunctrue = myworker.post('resolvetest', [true]); ...
...promise_domyfunctrue.then( function(aval) { console.log('fullfilled - promise_domyfunctrue - ', aval); }, function(areason) { console.error('rejected - promise_domyfunctrue - ', areason); } ).catch( function(acaught) { console.error('caught - promise_domyfunctrue - ', acaught); } ); var promise_domyfuncfalse = myworker.post('resolvetest', [false]); promise_domyfuncfalse.then( function(aval) { console.log('fullfilled - promise_domyfuncfalse - ', aval); }, function(areason) { console.error('rejected - promise_domyfuncfalse - ', areason); } ).catch( function(acaught) { console.error('caught - promise_domyfuncfalse - ', acaught); } ); result running the code above will log the following information ...
...to the console: "fullfilled - promise_domyfunctrue - " "you sent to promiseworker argument of: `true`" bootstrap.js line 8 "rejected - promise_domyfuncfalse - " "you passed in a non-true value for shouldresolve argument and therefore this will reject the main thread promise" bootstrap.js line 25 other examples github :: promiseworker with backward compatability - this example is of a firefox addon that copies and pastes in the contents of promiseworker.js and promiseworker.jsm so that it works all the way back till the firefox version in which the promise interface was frozen.

Index
true means to verify that the module is in fips mode, while false means to verify that the module is not in fips mode.
... -fips [true | false] enable (true) or disable (false) fips 140-2 compliance for the default nss module.
...for example: modutil -fips true -dbdir sql:/home/my/sharednssdb/ fips mode enabled.
... to verify that status of fips mode, run the -chkfips command with either a true or false flag (it doesn't matter which).

NSS tools : modutil
true means to verify that the module is in fips mode, while false means to verify that the module is not in fips mode.
... -fips [true | false] enable (true) or disable (false) fips 140-2 compliance for the default nss module.
...for example: modutil -fips true -dbdir sql:/home/my/sharednssdb/ fips mode enabled.
... to verify that status of fips mode, run the -chkfips command with either a true or false flag (it doesn't matter which).

NSS tools : modutil
true means to verify that the module is in fips mode, while false means to verify that the module is not in fips mode.
... -fips [true | false] enable (true) or disable (false) fips 140-2 compliance for the default nss module.
...for example: modutil -fips true -dbdir sql:/home/my/sharednssdb/ fips mode enabled.
... to verify that status of fips mode, run the -chkfips command with either a true or false flag (it doesn't matter which).

JSAPI User Guide
on success, a jsnative must call js_set_rval and return true.
....; break; } } return true; } defining classes this pulls together the above api elements by defining a constructor function, a prototype object, and properties of the prototype and of the constructor, all with one api call.
...this is especially true if you are using the js engine with scripts to automate your application.
... block simple denial-of-service attacks - a program like while(true){} should not hang your application.

JSBool
js_true has been replaced by just true and in the same way js_false by false.
...js_true indicates success; js_false indicates an error or exception occurred.
...js_true is (jsbool) 1 and js_false is (jsbool) 0.
...instead, use jsval_true and jsval_false, and use boolean_to_jsval and jsval_to_boolean to convert.

JSDeletePropertyOp
if a jsdeletepropertyop does nothing and returns true, then property delete is unaffected.
...otherwise the callback must return true, and the property operation proceeds.
... if no error occurred, but the deletion attempt wasn't allowed (perhaps because the property was non-configurable), set *succeeded to false and return true.
... if no error occurred and the deletion wasn't disallowed (this is *not* the same as saying that a deletion actually occurred -- deleting a non-existent property, or an inherited property, is allowed -- it's just pointless), set *succeeded to true and return true.

JSErrorReport
macros name description jsreport_is_warning(flags) returns true if flags has jsreport_warning.
... jsreport_is_exception(flags) returns true if flags has jsreport_exception.
... jsreport_is_strict(flags) returns true if flags has jsreport_strict.
... jsreport_is_strict_mode_error(flags) returns true if flags has jsreport_strict_mode_error.

JSVAL_TO_BOOLEAN
as a precondition, jsval_is_boolean(v) must be true.
... that is, v must be either jsval_true or jsval_false.
...the result is js_true or js_false respectively.
...js_false is 0; js_true is 1.

JS_AlreadyHasOwnProperty
*foundp receives true if the property is found or false if it is not found.
...*foundp is set to true only if lookupproperty reports that the property was found on obj itself and not on some other object (even the corresponding outer object, if any).
... if the property is found on obj, this sets *foundp to true and returns true.
... if the property is not found on obj, this sets *foundp to false and returns true (to indicate that no error occurred).

JS_GetProperty
in the simplest case, js_getproperty stores the value of the property in *vp and returns true.
...for many objects, including objects of standard classes such as object and array, this hook does nothing and returns true, so the property get succeeds and undefined is left in *vp.
...for many properties, the getter does nothing and returns true, so the property get succeeds and the property's stored value is left in *vp.
... on success, these functions set *vp to the current value of the property, or undefined if obj has no such property, and return true.

A Web PKI x509 certificate primer
write extensions file (openssl.root.cnf) basicconstraints = critical, ca:true keyusage = keycertsign, crlsign subjectkeyidentifier = hash nameconstraints = permitted;dns:example.com,permitted;dns:example.net self-sign csr (using sha256) and append the extensions described in the file "openssl x509 -req -sha256 -days 3650 -in root.csr -signkey rootkey.pem -set_serial $any_small_integer -extfile openssl.root.cnf -out root.pem" now you have ca pem ...
... write extensions file (openssl.int.cnf) basicconstraints = critical, ca:true authoritykeyidentifier = keyid, issuer subjectkeyidentifier = hash keyusage = keycertsign, crlsign extendedkeyusage =serverauth authorityinfoaccess = ocsp;uri:http://ocsp.example.com:8888/ sign the intermediate csr with the root key and the intermediate extensions "openssl x509 -req -sha256 -days 2922 -in int.csr -cakey rootkey.pem -ca root.pem -set_serial $some_large_i...
...e what it means what can i do sec_error_bad_der a certificate is not properly encoded according to asn.1 (der) encoding re-generate the improperly-encoded certificate sec_error_ca_cert_invalid an end-entity certificate is being used to issue another certificate ensure that any certificate intended to issue certificates has a basic constraints extension with ca: true sec_error_bad_signature a signature on a certificate is improperly formatted or the certificate has been tampered with re-issue the certificate with the bad signature sec_error_cert_bad_access_location the ocsp uri in the authorityinformationaccess extension is improperly formed re-generate the certificate with a well-formed ocsp uri sec_error_cert_not_in_na...
... import the root certificate into firefox or have the server send the intermediate sec_error_invalid_key sec_error_unsupported_keyalg sec_error_expired_issuer_certificate an issuer certificate is too old re-issue the issuer certificate mozilla_pkix_error_ca_cert_used_as_end_entity a certificate with a basic constraints extension with ca:true is being used as an end-entity certificate re-generate the end-entity certificate without the basic constraints extension mozilla_pkix_error_inadequate_key_size a certificate has a key that is too small to be secure re-generate a larger key and issue a certificate using that key ...

jsdIStackFrame
|true| if this context should be allowed to run scripts, |false| otherwise.
... isconstructing boolean true if stack frame is constructing a new object.
... isdebugger boolean true if stack frame represents a frame created as a result of a debugger evaluation.
... isnative boolean true if stack frame represents a native frame.

mozIStorageConnection
transactioninprogress boolean returns true if there is a transaction in progress on the database.
... mozistorageconnection clone( in boolean areadonly optional ); parameters areadonly if true, the returned database connection is in read only mode.
... return value true if the index exists, false otherwise.
... return value returns true if the table exists, false otherwise.

nsIAccessibleHyperLink
note: currently only used with aria links, and the author has to specify that the link is invalid via the aria-invalid='true' attribute.
... in all other cases, true is returned.
... return value true if the element currently has the focus.
... return value true if the hyperlink is valid.

nsIAccessibleTable
return value true if the cell is selected, false if the cell is not selected.
... return value true if the column is selected, false if the column is not selected.
... return value true if the table is probably for layout, false if the table is probably not for layout.
... return value true if the row is selected, false if the row is not selected.

nsIAlertsService
textclickable optional if true, if the user clicks on it, the listener is notified; when hovered the notification background becomes lighter and the cursor turns to a pointer.
...if true, the image url will be loaded in private browsing mode.
... getservice(components.interfaces.nsialertsservice); try { alertsservice.showalertnotification("", "alerts service test", "click me", true, "cookie", listener, ""); } catch (e) { // this can fail on mac os x } example 2 this example shows how to use all the available observer topics: var as = cc['@mozilla.org/alerts-service;1'].getservice(ci.nsialertsservice); var notiflistener = { observe: function(asubject, atopic, adata) { console.error('incoming notification observer:', asubject, atopic, adata); if (at...
...click here to focus the tab', true, null, notiflistener, 'stackoverflow notifier'); closealert() closes alerts created by the service.

nsIAnnotationService
return value returns true, if an annotation exists for given uri, otherwise returns false.
... return value returns true, if an annotation exists for given item, otherwise returns false.
... aoverwritedest if you want to overwrite existing annotation, set this parameter to true, or else set it to false.
... aoverwritedest if you want to overwrite existing annotation, set this parameter to true or else false.

nsIApplicationCacheChannel
1.0 66 introduced gecko 1.9.1 inherits from: nsiapplicationcachecontainer last changed in gecko 2.0 (firefox 4 / thunderbird 3.3 / seamonkey 2.1) method overview void markofflinecacheentryasforeign(); attributes attribute type description chooseapplicationcache boolean when true, the channel will choose an application cache if one was not explicitly provided and none is available from the notification callbacks.
... inheritapplicationcache boolean true if the channel will ask its notification callbacks for an application cache if one is not explicitly provided.
... the default value is true.
... loadedfromapplicationcache prbool true if the resource was loaded from the application cache, otherwise false.

nsIAsyncStreamCopier
asourcebuffered true if asource implements nsiinputstream.readsegments().
... asinkbuffered true if asink implements nsiinputstream.writesegments() .
...aclosesource true if asource should be closed after copying.
... aclosesink true if asink should be closed after copying.

nsIClipboardDragDropHooks
return value true indicates to the operating system that if a drop does happen on this browser, it will be accepted.
... return value true if the drag can proceed.
... return value true to indicate that copy/drag can proceed.
... return value true to indicate the action was handled, do not perform built-in behavior.

nsIDOMMouseScrollEvent
ctrlkeyarg true if the control key was down when the event occurred, otherwise false.
... altkeyarg true if the alt key was down when the event occurred, otherwise false.
... shiftkeyarg true if the shift key was down when the event occurred, otherwise false.
... metakeyarg true if the meta key was down when the event occurred, otherwise false.

nsIEditor
returns true if the document has no *meaningful* content.
...returns true if the document is modifed and needs saving.
...returns true if we have a document that is not marked read-only.
...true if the current selection anchor is editable; otherwise false.

nsIJumpListBuilder
return value true if the operation completed successfully.
...return value true if the operation completed successfully.
...return value true if the operation completed successfully.
... return value true if the operation completed successfully.

nsINavHistoryQueryOptions
1.0 66 introduced gecko 1.9 inherits from: nsisupports last changed in gecko 13.0 (firefox 13.0 / thunderbird 13.0 / seamonkey 2.10) method overview nsinavhistoryqueryoptions clone(); attributes attribute type description applyoptionstocontainers boolean if true, the query options are only applied to the containers.
... asyncenabled boolean when true, the root container node generated by these options and all of its descendant containers are opened asynchronously if they support doing so.
... excludequeries boolean set to true to exclude queries ("place:" uris) from the query results.
... excludereadonlyfolders boolean set to true to exclude read-only folders from the query results.

nsIPrincipal
void checkmayload( in nsiuri uri, in boolean report ); parameters uri missing description report if true, will report a warning to the console service if the load is not allowed.
... return value true if the two principals are equivalent; otherwise false.
... istrusted true if the certificate is a codebase trusted one.
...boolean subsumes( in nsiprincipal other ); parameters other missing description return value true if this principal subsumes the specified principal; otherwise false.

nsISelection
if partlycontained is set to pr_true, the function returns true when some part of the node is part of the selection.
... if partlycontained is set to pr_false, the function only returns true when the entire node is part of the selection.
... boolean containsnode( in nsidomnode node, in boolean partlycontained ); parameters node the nsidomnode to look for partlycontained if partlycontained is set to pr_false, the function only returns true when the entire node is part of the selection.
...void selectionlanguagechange( in boolean langrtl ); parameters langrtl is pr_true if the new language is right-to-left or pr_false if the new language is left-to-right.

nsITreeColumn
cycler boolean if true, then the column is a cycler column.
... editable boolean if true the nsitreecolumn content is editable.
... primary boolean if true the nsitreecolumn is the primary column.
... selectable boolean if true the nsitreecolumn is able to be selected.

nsIWebBrowserFindInFrames
default is true.
... setting nsiwebbrowserfind.searchframes to true sets this to true.
...default is true.
... setting nsiwebbrowserfind.searchframes to true sets this to true.

Type conversion
)(); var somecfunction = library.declare("somecfunction", ctypes.default_abi, ctypes.void_t, ctypes.char.ptr); somecfunction(buffer); // here ctypes.char.array(10)() is converted to ctypes.char.ptr type implicit conversion can be tested in the following way: var mystruct = ctypes.structtype("mystructtype", [ { "v": ctypes.bool } ])(); mystruct.v = 1; console.log(mystruct.v.tostring()); // 'true' boolean type target type source converted value ctypes.bool js boolean src js number (0 or 1) if src == 0: false if src == 1: true var mystruct = ctypes.structtype("mystructtype", [ { "v": ctypes.bool } ])(); mystruct.v = true; console.log(mystruct.v.tostring()); // 'true' mystruct.v = false; console.log(mystruct.v.tostring()); // 'f...
...alse' mystruct.v = 1; console.log(mystruct.v.tostring()); // 'true' mystruct.v = 0; console.log(mystruct.v.tostring()); // 'false' mystruct.v = 10; // throws error mystruct.v = "a"; // throws error integer types target type source converted value ctypes.char16_t js string (only if its length == 1) src.charcodeat(0) any integer types js number (only if fits to the size) src js boolean if src == true: 1 if src == false: 0 var mystruct = ctypes.structtype("mystructtype", [ { "v": ctypes.char16_t } ])(); mystruct.v = 0x41; console.log(mystruct.v.tostring()); // "a" mystruct.v = true; console.log(mystruct.v.tostring()); // "\x01" mystruct.v = "x"; console.log(mystruct.v.tostring()); // "x" mystruct.v ...
...= "xx"; // throws error var mystruct = ctypes.structtype("mystructtype", [ { "v": ctypes.int16_t } ])(); mystruct.v = 0x41; console.log(mystruct.v.tostring()); // 65 mystruct.v = true; console.log(mystruct.v.tostring()); // 1 mystruct.v = "x"; // throws error integer/float types are implicitly convertible if any data of source type could be representable in the target type.
...ted explicitly, when passing to cdata constructor: ctypes.int32_t("123"); // string "123" is parsed as 10-base string explicit convert tries implicit convert first, and if it fails, the following rules are applied: boolean type target type source converted value ctype.bool js value toboolean(src) console.log(ctypes.bool("123").tostring()); // 'ctypes.bool(true)' console.log(ctypes.bool("").tostring()); // 'ctypes.bool(false)' integer types target type source converted value any integer types js number except -infinity, infinity, nan c-style cast -infinity 0 infinity nan ctypes.int64 c-style cast ctypes.uint64 js string with base-10 or base-16 string (onl...

Debugger.Environment - Firefox Developer Tools
accessor properties of the debugger.environment prototype object a debugger.environment instance inherits the following accessor properties from its prototype: inspectable true if this environment is a debuggee environment, and can therefore be inspected.
... optimizedout true if this environment is optimized out.
...when true, getvariable returns an ordinary javascript object whose optimizedout property is true on all bindings, and setvariable throws a referenceerror.
...if the given variable should be in scope, but getvariable is unable to produce its value, it returns an ordinary javascript object (not a debugger.object instance) whose optimizedout property is true.

Debugger.Frame - Firefox Developer Tools
a frame is a visible frame if any of the following are true: it is running debuggee code; its immediate caller is a frame running debuggee code; or it is a "debugger" frame, representing the continuation of debuggee code invoked by the debugger.
... live true if the frame this debugger.frame instance refers to is still on the stack; false if it has completed execution or been popped in some other way.
... generator true if this frame is a generator frame, false otherwise.
... constructing true if this frame is for a function called as a constructor, false otherwise.

Debugger.Memory - Firefox Developer Tools
allocation site tracking the javascript engine marks each new object with the call stack at which it was allocated, if: the object is allocated in the scope of a global object that is a debuggee of some debugger instancedbg; and dbg.memory.trackingallocationsites is set to true.
... allocation logging ifdbg is a debugger instance, and dbg.memory.trackingallocationsites is set to true, then the javascript engine logs each object allocated bydbg’s debuggee code.
...reading the accessor produces true if the debugger is capturing stacks for object allocations, and false otherwise.
... allocationslogoverflowed returns true if there have been more than [maxallocationsloglength][#max-alloc-log] allocations since the last time [drainallocationslog][#drain-alloc-log] was called and some data has been lost.

Attr - Web APIs
as that doesn't hold true in cases like attr objects being returned by document.evaluate, the dom living standard reintroduced the property.
... specified read only this property always returns true.
... originally, it returned true if the attribute was explicitly specified in the source code or by a script, and false if its value came from the default one defined in the document's dtd.
... specified this property now always returns true.

AudioBufferSourceNode.loopEnd - Web APIs
this is only used if the loop property is true.
...this property is only used if the loop property is true.
... function getdata() { source = audioctx.createbuffersource(); request = new xmlhttprequest(); request.open('get', 'viper.ogg', true); request.responsetype = 'arraybuffer'; request.onload = function() { var audiodata = request.response; audioctx.decodeaudiodata(audiodata, function(buffer) { mybuffer = buffer; songlength = buffer.duration; source.buffer = mybuffer; source.playbackrate.value = playbackcontrol.value; source.connect(audioctx.destination); source.loop ...
...= true; loopstartcontrol.setattribute('max', math.floor(songlength)); loopendcontrol.setattribute('max', math.floor(songlength)); }, function(e){"error with decoding audio data" + e.err}); } request.send(); } ...

Background Tasks API - Web APIs
as a result, while our shim doesn't constrain itself to the amount of idle time left in the current event loop pass like the true requestidlecallback(), it does at least limit the callback to no more than 50 milliseconds of run time per pass.
...er(task.data); schedulestatusrefresh(); } if (tasklist.length) { taskhandle = requestidlecallback(runtaskqueue, { timeout: 1000} ); } else { taskhandle = 0; } } runtaskqueue()'s core is a loop which continues as long as there's time left (as determined by checking deadline.timeremaining) to be sure it's more than 0 or if the timeout limit was reached (deadline.didtimeout is true), and as long as there are tasks in the task list.
... function schedulestatusrefresh() { if (!statusrefreshscheduled) { requestanimationframe(updatedisplay); statusrefreshscheduled = true; } } this is a simple function.
...!= currenttasknumber) { currenttasknumberelem.textcontent = currenttasknumber; progressbarelem.value = currenttasknumber; } } if (logfragment) { logelem.appendchild(logfragment); logfragment = null; } if (scrolledtoend) { logelem.scrolltop = logelem.scrollheight - logelem.clientheight; } statusrefreshscheduled = false; } first, scrolledtoend is set to true if the text in the log is scrolled to the bottom; otherwise it's set to false.

Element: mousedown event - Web APIs
first we store the x and y coordinates of the mouse pointer in the variables x and y, and then set isdrawing to true.
...if isdrawing is true, the event handler calls the drawline function to draw a line from the stored x and y values to the current location.
... html <h1>drawing with mouse events</h1> <canvas id="mypics" width="560" height="360"></canvas> css canvas { border: 1px solid black; width: 560px; height: 360px; } javascript // when true, moving the mouse draws on the canvas let isdrawing = false; let x = 0; let y = 0; const mypics = document.getelementbyid('mypics'); const context = mypics.getcontext('2d'); // event.offsetx, event.offsety gives the (x,y) offset from the edge of the canvas.
... // add the event listeners for mousedown, mousemove, and mouseup mypics.addeventlistener('mousedown', e => { x = e.offsetx; y = e.offsety; isdrawing = true; }); mypics.addeventlistener('mousemove', e => { if (isdrawing === true) { drawline(context, x, y, e.offsetx, e.offsety); x = e.offsetx; y = e.offsety; } }); window.addeventlistener('mouseup', e => { if (isdrawing === true) { drawline(context, x, y, e.offsetx, e.offsety); x = 0; y = 0; isdrawing = false; } }); function drawline(context, x1, y1, x2, y2) { context.beginpath(); context.strokestyle = 'black'; context.linewidth = 1; context.moveto(x1, y1); context.lineto(x2, y2); context.stroke(); context.closepath(); } result specifications specification status ...

Element: mousemove event - Web APIs
first we store the x and y coordinates of the mouse pointer in the variables x and y, and then set isdrawing to true.
...if isdrawing is true, the event handler calls the drawline function to draw a line from the stored x and y values to the current location.
... html <h1>drawing with mouse events</h1> <canvas id="mypics" width="560" height="360"></canvas> css canvas { border: 1px solid black; width: 560px; height: 360px; } javascript // when true, moving the mouse draws on the canvas let isdrawing = false; let x = 0; let y = 0; const mypics = document.getelementbyid('mypics'); const context = mypics.getcontext('2d'); // event.offsetx, event.offsety gives the (x,y) offset from the edge of the canvas.
... // add the event listeners for mousedown, mousemove, and mouseup mypics.addeventlistener('mousedown', e => { x = e.offsetx; y = e.offsety; isdrawing = true; }); mypics.addeventlistener('mousemove', e => { if (isdrawing === true) { drawline(context, x, y, e.offsetx, e.offsety); x = e.offsetx; y = e.offsety; } }); window.addeventlistener('mouseup', e => { if (isdrawing === true) { drawline(context, x, y, e.offsetx, e.offsety); x = 0; y = 0; isdrawing = false; } }); function drawline(context, x1, y1, x2, y2) { context.beginpath(); context.strokestyle = 'black'; context.linewidth = 1; context.moveto(x1, y1); context.lineto(x2, y2); context.stroke(); context.closepath(); } result specifications specification status ...

Element: mouseup event - Web APIs
first we store the x and y coordinates of the mouse pointer in the variables x and y, and then set isdrawing to true.
...if isdrawing is true, the event handler calls the drawline function to draw a line from the stored x and y values to the current location.
... html <h1>drawing with mouse events</h1> <canvas id="mypics" width="560" height="360"></canvas> css canvas { border: 1px solid black; width: 560px; height: 360px; } javascript // when true, moving the mouse draws on the canvas let isdrawing = false; let x = 0; let y = 0; const mypics = document.getelementbyid('mypics'); const context = mypics.getcontext('2d'); // event.offsetx, event.offsety gives the (x,y) offset from the edge of the canvas.
... // add the event listeners for mousedown, mousemove, and mouseup mypics.addeventlistener('mousedown', e => { x = e.offsetx; y = e.offsety; isdrawing = true; }); mypics.addeventlistener('mousemove', e => { if (isdrawing === true) { drawline(context, x, y, e.offsetx, e.offsety); x = e.offsetx; y = e.offsety; } }); window.addeventlistener('mouseup', e => { if (isdrawing === true) { drawline(context, x, y, e.offsetx, e.offsety); x = 0; y = 0; isdrawing = false; } }); function drawline(context, x1, y1, x2, y2) { context.beginpath(); context.strokestyle = 'black'; context.linewidth = 1; context.moveto(x1, y1); context.lineto(x2, y2); context.stroke(); context.closepath(); } result specifications specification status ...

Event.composed - Web APIs
syntax const iscomposed = event.composed; value a boolean which is true if the event will cross from the shadow dom into the standard dom after reaching the shadow root.
...for example, this includes synthetic events that are created without their composed option wil set to true.
... propagation only occurs if the bubbles property is also true.
... the composed property returns true beause the click event is always able to propagate across shadow boundaries.

EventTarget.removeEventListener() - Web APIs
for example, consider this call to addeventlistener(): element.addeventlistener("mousedown", handlemousedown, true); now consider each of these two calls to removeeventlistener(): element.removeeventlistener("mousedown", handlemousedown, false); // fails element.removeeventlistener("mousedown", handlemousedown, true); // succeeds the first call fails because the value of usecapture doesn't match.
... now consider this: element.addeventlistener("mousedown", handlemousedown, { passive: true }); here, we specify an options object in which passive is set to true, while the other options are left to the default value of false.
...any of them in which capture or usecapture is true fail; all others succeed.
... element.removeeventlistener("mousedown", handlemousedown, { passive: true }); // succeeds element.removeeventlistener("mousedown", handlemousedown, { capture: false }); // succeeds element.removeeventlistener("mousedown", handlemousedown, { capture: true }); // fails element.removeeventlistener("mousedown", handlemousedown, { passive: false }); // succeeds element.removeeventlistener("mousedown", handlemousedown, false); // succeeds element.removeeventlistener("mousedown", handlemousedown, true); // fails it's worth noting that some browser releases have been inconsistent on this, and unless you have specific reasons otherwise, it's probably wise to use the same values used for the ca...

FileSystemFlags.create - Web APIs
true false path exists the existing file or directory is removed and replaced with a new one, then the successcallback is called with a filesystemfileentry or a filesystemdirectoryentry, as appropriate.
... true false path doesn't exist the file or directory is created, then a filesystemfileentry or a filesystemdirectoryentry is passed to the successcallback, as appropriate.
... true true path exists the errorcallback is called with an appropriate error, such as fileerror.path_exists_err.
... true true path doesn't exist the file or directory is created, then a filesystemfileentry or a filesystemdirectoryentry is passed to the successcallback, as appropriate.

FileSystemFlags.exclusive - Web APIs
true false path exists the existing file or directory is removed and replaced with a new one, then the successcallback is called with a filesystemfileentry or a filesystemdirectoryentry, as appropriate.
... true false path doesn't exist the file or directory is created, then a filesystemfileentry or a filesystemdirectoryentry is passed to the successcallback, as appropriate.
... true true path exists the errorcallback is called with an appropriate error, such as fileerror.path_exists_err.
... true true path doesn't exist the file or directory is created, then a filesystemfileentry or a filesystemdirectoryentry is passed to the successcallback, as appropriate.

Guide to the Fullscreen API - Web APIs
te name alternate name uses the non-standard name: webkitisfullscreenfirefox full support 64 full support 64 no support 49 — 65disabled disabled from version 49 until version 65 (exclusive): this feature is behind the full-screen-api.unprefix.enabled preference (needs to be set to true).
...alternate name uses the non-standard name: webkitisfullscreenfirefox android full support 64 full support 64 no support 49 — 65disabled disabled from version 49 until version 65 (exclusive): this feature is behind the full-screen-api.unprefix.enabled preference (needs to be set to true).
...bkitedge full support 12firefox full support 64 full support 64 no support 47 — 65disabled disabled from version 47 until version 65 (exclusive): this feature is behind the full-screen-api.unprefix.enabled preference (needs to be set to true).
...sprefixed prefixed implemented with the vendor prefix: webkitfirefox android full support 64 full support 64 no support 47 — 65disabled disabled from version 47 until version 65 (exclusive): this feature is behind the full-screen-api.unprefix.enabled preference (needs to be set to true).

HTMLSlotElement.name - Web APIs
3edge full support 79firefox full support 63 full support 63 no support 59 — 63disabled disabled from version 59 until version 63 (exclusive): this feature is behind the dom.webcomponents.shadowdom.enabled preference (needs to be set to true).
...— 59disabled disabled until version 59 (exclusive): this feature is behind the dom.webcomponents.enabled preference (needs to be set to true) and the dom.webcomponents.shadowdom.enabled preference (needs to be set to true).
... full support 53firefox android full support 63 full support 63 no support 59 — 63disabled disabled from version 59 until version 63 (exclusive): this feature is behind the dom.webcomponents.shadowdom.enabled preference (needs to be set to true).
...— 59disabled disabled until version 59 (exclusive): this feature is behind the dom.webcomponents.enabled preference (needs to be set to true) and the dom.webcomponents.shadowdom.enabled preference (needs to be set to true).

HTMLVideoElement.msZoom - Web APIs
syntax htmlvideoelement.mszoom; value boolean value set to true trims the video frame to the display space.
... when the mszoom attribute is set to true, the rendered video is trimmed to fit the dimensions of the video object.
... example this examples gets a video object and sets the mszoom property to true.
... var myvideo = document.getelementbyid("videotag1"); myvideo.mszoom = true; myvideo.play(); see also htmlvideoelement microsoft api extensions ...

Ajax navigation example - Web APIs
first_page.php: <?php $page_title = "first page"; $as_json = false; if (isset($_get["view_as"]) && $_get["view_as"] == "json") { $as_json = true; ob_start(); } else { ?> <!doctype html> <html> <head> <?php include "include/header.php"; echo "<title>" .
...t_clean())); } else { ?> </div> <p>this paragraph is shown only when the navigation starts from <strong>first_page.php</strong>.</p> <?php include "include/after_content.php"; echo "</body>\n</html>"; } ?> second_page.php: <?php $page_title = "second page"; $as_json = false; if (isset($_get["view_as"]) && $_get["view_as"] == "json") { $as_json = true; ob_start(); } else { ?> <!doctype html> <html> <head> <?php include "include/header.php"; echo "<title>" .
..."&" + sviewkey + "=" + sviewmode : "").slice(1)).replace(rendqstmark, ""); } function getpage (spage) { if (bisloading) { return; } oreq = new xmlhttprequest(); bisloading = true; oreq.onload = ajaxload; oreq.onerror = ajaxerror; if (spage) { opageinfo.url = filterurl(spage, null); } oreq.open("get", filterurl(opageinfo.url, "json"), true); oreq.send(); oloadingbox.parentnode || document.body.appendchild(oloadingbox); } function requestpage (surl) { if (history.pushstate) { bupdateurl = true; ...
... getpage(surl); } else { /* ajax navigation is not supported */ location.assign(surl); } } function processlink () { if (this.classname === sajaxclass) { requestpage(this.href); return false; } return true; } function init () { opageinfo.title = document.title; history.replacestate(opageinfo, opageinfo.title, opageinfo.url); for (var olink, nidx = 0, nlen = document.links.length; nidx < nlen; document.links[nidx++].onclick = processlink); } const /* customizable constants */ stargetid = "ajax-content", sviewkey = "view_as", sajaxclass = "ajax-nav", /* not customizable constants */ rsearch = /\?.*$/, rhost = /^[^\?]*...

IDBKeyRange.lowerOpen - Web APIs
syntax var loweropen = mykeyrange.loweropen value a boolean: value indication true the lower-bound value is not included in the key range.
...here we declare keyrangevalue = idbkeyrange.upperbound("f", "w", true, true); — a range that includes everything between "f" and "w" but not including them — since both the upper and lower bounds have been declared as open (true).
... after declaring the key range, we log its loweropen property value to the console, which should appear as "true": the lower bound is open, so won't be included in the range.
... note: for a more complete example allowing you to experiment with key range, have a look at our idbkeyrange-example repo (view the example live too.) function displaydata() { var keyrangevalue = idbkeyrange.bound("f", "w", true, true); console.log(keyrangevalue.loweropen); var transaction = db.transaction(['fthings'], 'readonly'); var objectstore = transaction.objectstore('fthings'); objectstore.opencursor(keyrangevalue).onsuccess = function(event) { var cursor = event.target.result; if(cursor) { var listitem = document.createelement('li'); listitem.innerhtml = '<strong>' + cursor.value.fthing + '</strong>, ' + cursor.value.frating; list.appendchild(listitem); cursor.continue(); } else { console.log('entries all displaye...

IDBKeyRange.upperOpen - Web APIs
syntax var upperopen = mykeyrange.upperopen value a boolean: value indication true the upper-bound value is not included in the key range.
...here we declare keyrangevalue = idbkeyrange.upperbound("f", "w", true, true); — a range that includes everything between "f" and "w" but not including them — since both the upper and lower bounds have been declared as open (true).
... after declaring the key range, we log its upperopen property value to the console, which should appear as "true": the upper bound is open, so won't be included in the range.
... note: for a more complete example allowing you to experiment with key range, have a look at our idbkeyrange-example repo (view the example live too.) function displaydata() { var keyrangevalue = idbkeyrange.bound("f", "w", true, true); console.log(keyrangevalue.upperopen); var transaction = db.transaction(['fthings'], 'readonly'); var objectstore = transaction.objectstore('fthings'); objectstore.opencursor(keyrangevalue).onsuccess = function(event) { var cursor = event.target.result; if(cursor) { var listitem = document.createelement('li'); listitem.innerhtml = '<strong>' + cursor.value.fthing + '</strong>, ' + cursor.value.frating; list.appendchild(listitem); cursor.continue(); } else { console.log('entries all displaye...

KeyboardEvent.key - Web APIs
if the key is held down further and the key produces a character key, then the event continues to be emitted in a platform implementation dependent interval and the keyboardevent.repeat read only property is set to true.
... if the key produces a character key that would result in a character being inserted into possibly an <input>, <textarea> or an element with htmlelement.contenteditable set to true, the beforeinput and input event types are fired in that order.
...as we keep holding the key, the keydown event continues to fire repeatedly and the keyboardevent.repeat property is set to true.
... } // cancel the default action to avoid it being handled twice event.preventdefault(); }, true); specification specification status comment ui eventsthe definition of 'keyboardevent.key' in that specification.

MediaStreamConstraints.audio - Web APIs
syntax var audioconstraints = true | false | mediatrackconstraints; value the value of the audio property can be specified as either of two types: boolean if a boolean value is specified, it simply indicates whether or not an audio track should be included in the returned stream; if it's true, an audio track is included; if no audio source is available or if permission is not given to use the audio source, the call to getusermedia() will fail.
... using a boolean value in this example, we provide a simple value of true for the audio property.
...-top: 2px; padding-bottom: 4px; color: white; background-color: darkgreen; } javascript content let audioelement = document.getelementbyid("audio"); let logelement = document.getelementbyid("log"); function log(msg) { logelement.innerhtml += msg + "<br>"; } document.getelementbyid("startbutton").addeventlistener("click", function() { navigator.mediadevices.getusermedia({ audio: true }).then(stream => audioelement.srcobject = stream) .catch(err => log(err.name + ": " + err.message)); }, false); here we see an event handler for a click event which uses getusermedia() to obtain an audio-only stream with no specific constraints, then attaches the resulting stream to an <audio> element once the stream is returned.
...e; background-color: darkgreen; } javascript content let audioelement = document.getelementbyid("audio"); let logelement = document.getelementbyid("log"); function log(msg) { logelement.innerhtml += msg + "<br>"; } document.getelementbyid("startbutton").addeventlistener("click", function() { navigator.mediadevices.getusermedia({ audio: { samplesize: 8, echocancellation: true } }).then(stream => audioelement.srcobject = stream) .catch(err => log(err.name + ": " + err.message)); }, false); here we see an event handler for a click event which calls getusermedia(), specifying a set of audio constraints requesting that echo cancellation be enabled and that, if possible, the sample rate be 8 bits per sample instead of the more common 16 bits (possibly as a bandw...

MediaTrackSettings - Web APIs
properties of audio tracks autogaincontrol a boolean which indicates the current value of the autogaincontrol property, which is true if automatic gain control is enabled and is false otherwise.
... echocancellation a boolean indicating the current value of the echocancellation property, specifying true if echo cancellation is enabled, otherwise false.
... noisesuppression a boolean which indicates the current value of the noisesupression property, which is true if noise suppression is enabled and is false otherwise.
... logicalsurface a boolean value which, if true, indicates that the video contained in the stream's video track contains a background rendering context, rather than a user-visible one.

MutationObserverInit.attributeOldValue - Web APIs
syntax var options = { attributeoldvalue: true | false } value a boolean value indicating whether or not the prior value of a changed attribute should be included in the mutationobserver.oldvalue property when reporting attribute value changes.
... if true, oldvalue is set accordingly.
... when using attributeoldvalue, setting the attributes option to true is optional.
...utation.type) { case "attributes": notifyuser("attribute name " + mutation.attributename + " changed to " + mutation.target[mutation.attributename] + " (was " + mutation.oldvalue + ")"); break; } }); } var targetnode = document.queryselector("#target"); var observer = new mutationobserver(callback); observer.observe(targetnode, { attributes: true, attributeoldvalue: true }); the callback() function—which will be passed into the observe() method when starting the observer, looks at each item in the list of mutationrecord objects.

MutationObserverInit.characterDataOldValue - Web APIs
if you set the mutationobserverinit.characterdata property to true but don't set characterdataoldvalue to true as well, the mutationrecord will not include information describing the prior state of the text node's contents.
... syntax var options = { characterdataoldvalue: true | false } value a boolean value indicating whether or not to set the mutationrecord's oldvalue property to be a string containing the value of the character node's contents prior to the change represented by the mutation record.
...to watch for changes to the text contents of all descendants of target, set the subtree option to true.
... if you set characterdataoldvalue to true, characterdata is automatically assumed to be true, even if you don't expressly set it as such.

PaymentResponse.shippingAddress - Web APIs
you can trigger this by setting paymentoptions.requestshipping to true when calling the paymentrequest constructor.
...}).catch(function(err) { console.error("uh oh, something bad happened", err.message); }); function updatedetails(details, shippingaddress, resolve) { if (shippingaddress.country === 'us') { var shippingoption = { id: '', label: '', amount: {currency: 'usd', value: '0.00'}, selected: true }; if (shippingaddress.region === 'mo') { shippingoption.id = 'mo'; shippingoption.label = 'free shipping in missouri'; details.total.amount.value = '55.00'; } else { shippingoption.id = 'us'; shippingoption.label = 'standard shipping in us'; shippingoption.amount.value = '5.00'; details.total.amount.value = '60.00'; } details.displayi...
... 61edge full support 15firefox full support 56notes disabled full support 56notes disabled notes available only in nightly builds.disabled from version 56: this feature is behind the dom.payments.request.enabled preference (needs to be set to true).
...to change preferences in chrome, visit chrome://flags.firefox android full support 56notes disabled full support 56notes disabled notes available only in nightly builds.disabled from version 56: this feature is behind the dom.payments.request.enabled preference (needs to be set to true).

PaymentResponse.shippingOption - Web APIs
this option is only present when the requestshipping option is set to true in the paymentoptions object passed to the paymentrequest constructor.
... = details.shippingoptions[1]; details.total.amount.value = '55.00'; } else if (shippingoption === 'express') { selectedshippingoption = details.shippingoptions[1]; othershippingoption = details.shippingoptions[0]; details.total.amount.value = '67.00'; } else { reject('unknown shipping option \'' + shippingoption + '\''); return; } selectedshippingoption.selected = true; othershippingoption.selected = false; details.displayitems.splice(2, 1, selectedshippingoption); resolve(details); } specifications specification status comment payment request api candidate recommendation initial definition.
... 61edge full support 15firefox full support 56notes disabled full support 56notes disabled notes available only in nightly builds.disabled from version 56: this feature is behind the dom.payments.request.enabled preference (needs to be set to true).
...to change preferences in chrome, visit chrome://flags.firefox android full support 56notes disabled full support 56notes disabled notes available only in nightly builds.disabled from version 56: this feature is behind the dom.payments.request.enabled preference (needs to be set to true).

Using the Payment Request API - Web APIs
in the following snippet, a merchant page performs this check, and if it returns true updates the checkout button to use paymentrequest instead of legacy web forms.
... checking before all prices are known if the checkout flow needs to know whether paymentrequest.canmakepayment() will return true even before all line items and their prices are known, you can instantiate paymentrequest with dummy data and pre-query .canmakepayment().
...let shouldcallpaymentrequest = true; let fallbacktolegacyonpaymentrequestfailure = false; (new paymentrequest(supportedpaymentmethods, {total: {label: 'stub', amount: {currency: 'usd', value: '0.01'}}}) .canmakepayment() .then(function(result) { shouldcallpaymentrequest = result; }).catch(function(error) { console.log(error); // the user may have turned off query ability in their privacy settings.
... shouldcallpaymentrequest = true; fallbacktolegacyonpaymentrequestfailure = true; }); // user has clicked on the checkout button.

PublicKeyCredentialRequestOptions.extensions - Web APIs
if true, the client outputs an arraybuffer which contains a value uniquely identifying a user verification data record.
...if true, the client outputs a coordinates object representing the geolocation of the authenticator.
...if true, the client outputs an array of arrays with 3 values containing information about how the user was verified (e.g.
... examples var options = { extensions: { uvm: true, loc: false, txauthsimple: "could you please verify yourself?" }, challenge: new uint8array([/* bytes sent from the server */]) }; navigator.credentials.get({ "publickey": options }) .then(function (credentialinfoassertion) { // send assertion response back to the server // to proceed with the control of the credential }).catch(function (err) { console.error(err); })...

RTCPeerConnection.createDataChannel() - Web APIs
rtcdatachannelinit dictionary the rtcdatachannelinit dictionary provides the following fields, any of which may be included in the object passed as the options parameter in order to configure the data channel to suit your needs: ordered optional indicates whether or not messages sent on the rtcdatachannel are required to arrive at their destination in the same order in which they were sent (true), or if they're allowed to arrive out-of-order (false).
... default: true.
...alternatively (true), they can be negotiated out of-band, where both sides call createdatachannel with an agreed-upon id.
... { var channel = event.channel;  channel.onopen = function(event) { channel.send('hi back!'); } channel.onmessage = function(event) { console.log(event.data); } } alternatively, more symmetrical out-of-band negotiation can be used, using an agreed-upon id (0 here): // both sides var pc = new rtcpeerconnection(options); var channel = pc.createdatachannel("chat", {negotiated: true, id: 0}); channel.onopen = function(event) { channel.send('hi!'); } channel.onmessage = function(event) { console.log(event.data); } for a more thorough example showing how the connection and channel are established, see a simple rtcdatachannel sample.

SVGSVGElement - Web APIs
if the initial view is a "custom" view, then this attribute is true.
... svgsvgelement.animationspaused() returns true if this svg document fragment is in a paused state.
... svgsvgelement.checkintersection() returns true if the rendered content of the given element intersects the supplied rectangle.
... svgsvgelement.checkenclosure() returns true if the rendered content of the given element is entirely contained within the supplied rectangle.

Slottable: assignedSlot - Web APIs
3edge full support 79firefox full support 63 full support 63 no support 59 — 63disabled disabled from version 59 until version 63 (exclusive): this feature is behind the dom.webcomponents.shadowdom.enabled preference (needs to be set to true).
...— 59disabled disabled until version 59 (exclusive): this feature is behind the dom.webcomponents.enabled preference (needs to be set to true) and the dom.webcomponents.shadowdom.enabled preference (needs to be set to true).
... full support 53firefox android full support 63 full support 63 no support 59 — 63disabled disabled from version 59 until version 63 (exclusive): this feature is behind the dom.webcomponents.shadowdom.enabled preference (needs to be set to true).
...— 59disabled disabled until version 59 (exclusive): this feature is behind the dom.webcomponents.enabled preference (needs to be set to true) and the dom.webcomponents.shadowdom.enabled preference (needs to be set to true).

SourceBuffer - Web APIs
sourcebuffer.updating changes from true to false.
...sourcebuffer.updating changes from true to false.
...sourcebuffer.updating changes from true to false.
... sourcebuffer.onupdatestart fired whenever the value of sourcebuffer.updating transitions from false to true.

SubtleCrypto.generateKey() - Web APIs
let keypair = window.crypto.subtle.generatekey( { name: "rsa-oaep", moduluslength: 4096, publicexponent: new uint8array([1, 0, 1]), hash: "sha-256" }, true, ["encrypt", "decrypt"] ); elliptic curve key pair generation this code generates an ecdsa signing key pair.
... let keypair = window.crypto.subtle.generatekey( { name: "ecdsa", namedcurve: "p-384" }, true, ["sign", "verify"] ); hmac key generation this code generates an hmac signing key.
... let key = window.crypto.subtle.generatekey( { name: "hmac", hash: {name: "sha-512"} }, true, ["sign", "verify"] ); aes key generation this code generates an aes-gcm encryption key.
... let key = window.crypto.subtle.generatekey( { name: "aes-gcm", length: 256 }, true, ["encrypt", "decrypt"] ); specifications specification status comment web cryptography apithe definition of 'subtlecrypto.generatekey()' in that specification.

SubtleCrypto.unwrapKey() - Web APIs
const saltbuffer = bytestoarraybuffer(saltbytes); // 3 derive the key from key material and salt return window.crypto.subtle.derivekey( { "name": "pbkdf2", salt: saltbuffer, "iterations": 100000, "hash": "sha-256" }, keymaterial, { "name": "aes-kw", "length": 256}, true, [ "wrapkey", "unwrapkey" ] ); } /* unwrap an aes secret key from an arraybuffer containing the raw bytes.
...unwrap the key return window.crypto.subtle.unwrapkey( "raw", // import format wrappedkeybuffer, // arraybuffer representing key to unwrap unwrappingkey, // cryptokey representing key encryption key "aes-kw", // algorithm identifier for key encryption key "aes-gcm", // algorithm identifier for key to unwrap true, // extractability of key to unwrap ["encrypt", "decrypt"] // key usages for key to unwrap ); } unwrapping a "pkcs8" key in this example we unwrap an rsa-pss private signing key.
... const saltbuffer = bytestoarraybuffer(saltbytes); // 3 derive the key from key material and salt return window.crypto.subtle.derivekey( { "name": "pbkdf2", salt: saltbuffer, "iterations": 100000, "hash": "sha-256" }, keymaterial, { "name": "aes-gcm", "length": 256}, true, [ "wrapkey", "unwrapkey" ] ); } /* unwrap an rsa-pss private signing key from an arraybuffer containing the raw bytes.
... // import format wrappedkeybuffer, // arraybuffer representing key to unwrap unwrappingkey, // cryptokey representing key encryption key { // algorithm params for key encryption key name: "aes-gcm", iv: ivbuffer }, { // algorithm params for key to unwrap name: "rsa-pss", hash: "sha-256" }, true, // extractability of key to unwrap ["sign"] // key usages for key to unwrap ); } specifications specification status comment web cryptography apithe definition of 'subtlecrypto.unwrapkey()' in that specification.

Animating textures in WebGL - Web APIs
getting access to the video the first step is to create the <video> element that we'll use to retrieve the video frames: // will set to true when video can be copied to texture var copyvideo = false; function setupvideo(url) { const video = document.createelement('video'); var playing = false; var timeupdate = false; video.autoplay = true; video.muted = true; video.loop = true; // waiting for these 2 events ensures // there is data in the video video.addeventlistener('playing', function() { playing = true; ...
... checkready(); }, true); video.addeventlistener('timeupdate', function() { timeupdate = true; checkready(); }, true); video.src = url; video.play(); function checkready() { if (playing && timeupdate) { copyvideo = true; } } return video; } first we create a video element.
...in the code above, we confirm whether we got both of those events; if so, we set a global variable, copyvideo, to true to indicate that it's safe to start copying the video to a texture.
... in the definition of render() if copyvideo is true, then we call updatetexture() each time just before we call the drawscene() function.

WebGL best practices - Web APIs
shaders, programs, and glsl avoid "#ifdef gl_es", which is always true you should never use #ifdef gl_es in your webgl shaders; although some early examples used this, it's not necessary, since this condition is always true in webgl shaders.
... instead of: function compileonce(gl, shader) { if (shader.compiled) return; gl.compileshader(shader); shader.compiled = true; } for (const [vs, fs, prog] of programs) { compileonce(gl, vs); compileonce(gl, fs); gl.linkprogram(prog); if (!gl.getprogramparameter(prog, gl.link_status)) { console.error('link failed: ' + gl.getprograminfolog(prog)); console.error('vs info-log: ' + gl.getshaderinfolog(vs)); console.error('fs info-log: ' + gl.getshaderinfolog(fs)); } } consider: function compileonce(g...
...l, shader) { if (shader.compiled) return; gl.compileshader(shader); shader.compiled = true; } for (const [vs, fs, prog] of programs) { compileonce(gl, vs); compileonce(gl, fs); } for (const [vs, fs, prog] of programs) { gl.linkprogram(prog); } for (const [vs, fs, prog] of programs) { if (!gl.getprogramparameter(prog, gl.link_status)) { console.error('link failed: ' + gl.getprograminfolog(prog)); console.error('vs info-log: ' + gl.getshaderinfolog(vs)); console.error('fs info-log: ' + gl.getshaderinfolog(fs)); } } khr_parallel_shader_compile for non-blocking compile/link status while we've described a pattern to allow browsers to compile and link in parallel, normally checking compile_status or link_status blocks until the compile or link completes.
... demo: https://jdashg.github.io/misc/webgl/device-pixel-presnap.html resizeobserver and 'device-pixel-content-box' on supporting browsers (chromium?), resizeobserver can be used with 'device-pixel-content-box' to request a callback that includes the true device pixel size of an element.

Signaling and video calling - Web APIs
function sendtooneuser(target, msgstring) { var isunique = true; var i; for (i=0; i<connectionarray.length; i++) { if (connectionarray[i].username === target) { connectionarray[i].send(msgstring); break; } } } this function iterates over the list of connected users until it finds one matching the specified username, then sends the message to that user.
... starting a call when the user clicks on a username they want to call, the invite() function is invoked as the event handler for that click event: var mediaconstraints = { audio: true, // we want an audio track video: true // ...and we want a video track }; function invite(evt) { if (mypeerconnection) { alert("you can't start a call because you already have one open!"); } else { var clickedusername = evt.target.textcontent; if (clickedusername === myusername) { alert("i'm afraid i can't let you talk to yourself.
... } if (localvideo.srcobject) { localvideo.srcobject.gettracks().foreach(track => track.stop()); } mypeerconnection.close(); mypeerconnection = null; } remotevideo.removeattribute("src"); remotevideo.removeattribute("srcobject"); localvideo.removeattribute("src"); remotevideo.removeattribute("srcobject"); document.getelementbyid("hangup-button").disabled = true; targetusername = null; } after pulling references to the two <video> elements, we check if a webrtc connection exists; if it does, we proceed to disconnect and close the call: all of the event handlers are removed.
... finally, we set the disabled property to true on the "hang up" button, making it unclickable while there is no call underway; then we set targetusername to null since we're no longer talking to anyone.

Writing a WebSocket server in C# - Web APIs
the value is zero until networkstream.dataavailable is true.
... tcpclient client = server.accepttcpclient(); console.writeline("a client connected."); networkstream stream = client.getstream(); //enter to an infinite cycle to be able to handle every change in stream while (true) { while (!stream.dataavailable); byte[] bytes = new byte[client.available]; stream.read(bytes, 0, bytes.length); } handshaking when a client connects to a server, it sends a get request to upgrade the connection to a websocket from a simple http request.
...ess.parse(ip), port); server.start(); console.writeline("server has started on {0}:{1}, waiting for a connection...", ip, port); tcpclient client = server.accepttcpclient(); console.writeline("a client connected."); networkstream stream = client.getstream(); // enter to an infinite cycle to be able to handle every change in stream while (true) { while (!stream.dataavailable); while (client.available < 3); // match against "get" byte[] bytes = new byte[client.available]; stream.read(bytes, 0, client.available); string s = encoding.utf8.getstring(bytes); if (regex.ismatch(s, "^get", regexoptions.ignorecase)) { console.writeline("=====handshaking fr...
...ing protocols\r\n" + "connection: upgrade\r\n" + "upgrade: websocket\r\n" + "sec-websocket-accept: " + swkasha1base64 + "\r\n\r\n"); stream.write(response, 0, response.length); } else { bool fin = (bytes[0] & 0b10000000) != 0, mask = (bytes[1] & 0b10000000) != 0; // must be true, "all messages from the client to the server have this bit set" int opcode = bytes[0] & 0b00001111, // expecting 1 - text message msglen = bytes[1] - 128, // & 0111 1111 offset = 2; if (msglen == 126) { // was touint16(bytes, offset) but the result is incorrect msglen = bitconverter.t...

HTML in XMLHttpRequest - Web APIs
function htmlinxhr() { if (!window.xmlhttprequest) return false; var req = new window.xmlhttprequest(); req.open('get', window.location.href, false); try { req.responsetype = 'document'; } catch(e) { return true; } return false; } view on jsfiddle this method is synchronous, does not rely on external assets though it may not be as reliable as method 2 described below since it does not check the actual feature but an indication of that feature.
...e file is named detect.html, the following function can be used for detecting html parsing support: function detecthtmlinxhr(callback) { if (!window.xmlhttprequest) { window.settimeout(function() { callback(false); }, 0); return; } var done = false; var xhr = new window.xmlhttprequest(); xhr.onreadystatechange = function() { if (this.readystate == 4 && !done) { done = true; callback(!!(this.responsexml && this.responsexml.title && this.responsexml.title == "&&<")); } } xhr.onabort = xhr.onerror = function() { if (!done) { done = true; callback(false); } } try { xhr.open("get", "detect.html"); xhr.responsetype = "document"; xhr.send(); } catch (e) { window.settimeout(function() { if (!done) { done...
... = true; callback(false); } }, 0); } } the argument callback is a function that will be called asynchronously with true as the only argument if html parsing is supported and false as the only argument if html parsing is not supported.
...(new regexp("(?:(?:.(?!<\\s*" + aexec[1] + "[^>]*[>]))*.?<\\s*" + aexec[1] + "[^>]*[>](?:.(?!<\\s*\/\\s*" + aexec[1] + "\\s*>))*.?<\\s*\/\\s*" + aexec[1] + "\\s*>)*(?:.(?!<\\s*\/\\s*" + aexec[1] + "\\s*>))*.?", "i")).exec(ssrc.slice(ssrc.indexof(aexec[0]) + aexec[0].length)) || "" : ""; } var oreq = new xmlhttprequest(); oreq.open("get", "yourpage.html", true); oreq.onload = function () { console.log(gethtml(this, "intro")); }; oreq.send(null); note: this solution is very expensive for the interpreter.

Sending and Receiving Binary Data - Web APIs
var oreq = new xmlhttprequest(); oreq.open("get", "/myfile.png", true); oreq.responsetype = "arraybuffer"; oreq.onload = function (oevent) { var arraybuffer = oreq.response; // note: not oreq.responsetext if (arraybuffer) { var bytearray = new uint8array(arraybuffer); for (var i = 0; i < bytearray.bytelength; i++) { // do something with each byte in the array } } }; oreq.send(null); you can also read a binary file as a blob by setting ...
... var oreq = new xmlhttprequest(); oreq.open("get", "/myfile.png", true); oreq.responsetype = "blob"; oreq.onload = function(oevent) { var blob = oreq.response; // ...
... var oreq = new xmlhttprequest(); oreq.open("post", url, true); oreq.onload = function (oevent) { // uploaded.
... var req = new xmlhttprequest(); req.open("post", url, true); // set headers and mime-type appropriately req.setrequestheader("content-length", 741); req.sendasbinary(abody); line 4 sets the content-length header to 741, indicating that the data is 741 bytes long.

Synchronous and asynchronous requests - Web APIs
var xhr = new xmlhttprequest(); xhr.open("get", "/bar/foo.txt", true); xhr.onload = function (e) { if (xhr.readystate === 4) { if (xhr.status === 200) { console.log(xhr.responsetext); } else { console.error(xhr.statustext); } } }; xhr.onerror = function (e) { console.error(xhr.statustext); }; xhr.send(null); line 2 specifies true for its third parameter to indicate that the request should be handled asynchronously.
...*/) { var xhr = new xmlhttprequest(); xhr.callback = callback; xhr.arguments = array.prototype.slice.call(arguments, 2); xhr.onload = xhrsuccess; xhr.onerror = xhrerror; xhr.open("get", url, true); xhr.send(null); } usage: function showmessage(message) { console.log(message + this.responsetext); } loadfile("message.txt", showmessage, "new message!\n\n"); the signature of the utility function loadfile declares (i) a target url to read (via an http get request), (ii) a function to execute on successful completion of the xhr operation, and (iii) an arbitrary list of additional ...
... line 15 specifies true for its third parameter to indicate that the request should be handled asynchronously.
... new xmlhttprequest(); xhr.ontimeout = function () { console.error("the request for " + url + " timed out."); }; xhr.onload = function() { if (xhr.readystate === 4) { if (xhr.status === 200) { callback.apply(xhr, args); } else { console.error(xhr.statustext); } } }; xhr.open("get", url, true); xhr.timeout = timeout; xhr.send(null); } notice the addition of code to handle the "timeout" event by setting the ontimeout handler.

XMLHttpRequest() - Web APIs
setting the mozanon flag to true effectively resembles the anonxmlhttprequest() constructor described in older versions of the xmlhttprequest specification.
... const request = new xmlhttprequest(paramsdictionary); parameters (non-standard) objparameters there are two flags you can set: mozanon boolean: setting this flag to true will cause the browser not to expose the origin and user credentials when fetching resources.
... mozsystem boolean: setting this flag to true allows making cross-site connections without requiring the server to opt-in using cors.
... requires setting mozanon: true, i.e.

XMLHttpRequest.withCredentials - Web APIs
xmlhttprequest from a different domain cannot set cookie values for their own domain unless withcredentials is set to true before making the request.
... the third-party cookies obtained by setting withcredentials to true will still honor same-origin policy and hence can not be accessed by the requesting script through document.cookie or from response headers.
... note: xmlhttprequest responses from a different domain cannot set cookie values for their own domain unless withcredentials is set to true before making the request, regardless of access-control- header values.
... example var xhr = new xmlhttprequest(); xhr.open('get', 'http://example.com/', true); xhr.withcredentials = true; xhr.send(null); specifications specification status comment xmlhttprequest living standard whatwg living standard ...

XRView.eye - Web APIs
however, we have flags which, if true, indicate that a particular eye has been injured during gameplay.
... when rendering that eye, if the flag is true, that view is skipped instead of being rendered.
...injured) { skipview = updateinjury(body.righteye); } if (!skipview) { let viewport = gllayer.getviewport(view); gl.viewport(viewport.x, viewport.y, viewport.width, viewport.height); renderscene(gl, view); } } for each of the views, the value of eye is checked and if it's either left or right, we check to see if the body.lefteye.injured or body.righteye.injured property is true; if so, we call a function updateinjury() on that eye to do things such as allow a bit of healing to occur, track the progress of a poison effect, or the like, as appropriate for the game's needs.
... updateinjury() returns true if the eye is still injured or false if the eye has been restored to health by the function,.

ARIA: checkbox role - Accessibility
similarly, an element with role="checkbox" can expose three states through the aria-checked attribute: true, false, or mixed.
...this attribute has one of three possible values: true the checkbox is checked false the checkbox is not checked mixed the checkbox is partially checked, or indeterminate tabindex="0" used to make it focusable so the assistive technology user can tab to it and start reading right away.
... html <span role="checkbox" id="chkpref" aria-checked="false" onclick="changecheckbox()" onkeypress="changecheckbox()" tabindex="0" aria-labelledby="chk1-label"></span> <label id="chk1-label" onclick="changecheckbox()" onkeypress="changecheckbox()">remember my preferences</label> css [role="checkbox"] { padding:5px; } [aria-checked="true"]::before { content: "[x]"; } [aria-checked="false"]::before { content: "[ ]"; } javascript function changecheckbox(event) { let item = document.getelementbyid('chkpref'); switch(item.getattribute('aria-checked')) { case "true": item.setattribute('aria-checked', "false"); break; case "false": item.setattribute('aria-checked', ...
..."true"); break; } } accessibility concerns when the checkbox role is added to an element, the user agent should do the following: expose the element as having a checkbox role in the operating system's accessibility api.

Basic form hints - Accessibility
="radiogroup" id="rg1" role="radiogroup" aria-labelledby="rg1_label"> <li id="r1" tabindex="-1" role="radio" aria-checked="false"> <img role="presentation" src="radio-unchecked.gif" /> thai </li> <li id="r2" tabindex="-1" role="radio" aria-checked="false"> <img role="presentation" src="radio-unchecked.gif" /> subway </li> <li id="r3" tabindex="0" role="radio" aria-checked="true"> <img role="presentation" src="radio-checked.gif" /> radio maria </li> </ul> describing with aria form controls sometimes have a description associated with them, in addition to the label.
...on lines 4 and 12, the aria-required attributes are set to true (in addition to the asterisks next to the labels), indicating that the name and email fields are required.
... <form> <div> <label for="name">* name:</label> <input type="text" value="name" id="name" aria-required="true"/> </div> <div> <label for="phone">phone:</label> <input type="text" value="phone" id="phone" aria-required="false"/> </div> <div> <label for="email">* e-mail:</label> <input type="text" value="email" id="email" aria-required="true"/> </div> </form> the script that validates the form entry would look something like this: var validate = function () { var emailelement = document.getelementbyid(emailfieldid);...
... var valid = emailvalid(formdata.email); // returns true if valid, false otherwise emailelement.setattribute("aria-invalid", !valid); setelementbordercolour(emailelement, valid); // sets the border to red if second arg is false }; providing helpful error messages read how to use aria alerts to enhance forms.

CSS Scrollbars - CSS: Cascading Style Sheets
noedge no support nofirefox full support 64 full support 64 full support 63disabled disabled from version 63: this feature is behind the layout.css.scrollbar-width.enabled preference (needs to be set to true).
...ochrome android no support nofirefox android full support 64 full support 64 full support 63disabled disabled from version 63: this feature is behind the layout.css.scrollbar-width.enabled preference (needs to be set to true).
... full support 63disabled disabled from version 63: this feature is behind the layout.css.scrollbar-color.enabled preference (needs to be set to true).
...ochrome android no support nofirefox android full support 64 full support 64 full support 63disabled disabled from version 63: this feature is behind the layout.css.scrollbar-color.enabled preference (needs to be set to true).

Getting Started - Developer guides
}; next, after declaring what happens when you receive the response, you need to actually make the request, by calling the open() and send() methods of the http request object, like this: httprequest.open('get', 'http://www.example.org/some.file', true); httprequest.send(); the first parameter of the call to open() is the http request method – get, post, head, or another method supported by your server.
...if true (the default), javascript execution will continue and the user can interact with the page while the server response has yet to arrive.
...you have two options to access that data: httprequest.responsetext – returns the server response as a string of text httprequest.responsexml – returns the response as an xmldocument object you can traverse with javascript dom functions note that the steps above are valid only if you used an asynchronous request (the third parameter of open() was unspecified or set to true).
... </style> </head> <body> <p id="writedata" class="data">off-line</p> <p id="laststamp">no data yet</p> <script> const fulldata = document.getelementbyid('writedata'); const lastdata = document.getelementbyid('laststamp'); function fetchdata() { console.log('fetching updated data.'); let xhr = new xmlhttprequest(); xhr.open("get", "time-log.txt", true); xhr.onload = function() { updatedisplay(xhr.response); } xhr.send(); } function updatedisplay(text) { fulldata.textcontent = text; let timearray = text.split('\n'); // included because some file systems always include a blank line at the end of text files.

Creating and triggering events - Developer guides
event.initevent('build', true, true); // listen for the event.
...to trigger an event from a child element, and have an ancestor catch it; optionally, with data: <form> <textarea></textarea> </form> const form = document.queryselector('form'); const textarea = document.queryselector('textarea'); // create a new event, allow bubbling, and provide any data you want to pass to the "detail" property const eventawesome = new customevent('awesome', { bubbles: true, detail: { text: () => textarea.value } }); // the form element listens for the custom "awesome" event and then consoles the output of the passed text() method form.addeventlistener('awesome', e => console.log(e.detail.text())); // as the user types, the textarea inside the form dispatches/triggers the event to fire, and uses itself as the starting point textarea.addeventlistener('input', e =...
...tor('textarea'); form.addeventlistener('awesome', e => console.log(e.detail.text())); textarea.addeventlistener('input', function() { // create and dispatch/trigger an event on the fly // note: optionally, we've also leveraged the "function expression" (instead of the "arrow function expression") so "this" will represent the element this.dispatchevent(new customevent('awesome', { bubbles: true, detail: { text: () => textarea.value } })) }); triggering built-in events this example demonstrates simulating a click (that is programmatically generating a click event) on a checkbox using dom methods.
... function simulateclick() { const event = new mouseevent('click', { view: window, bubbles: true, cancelable: true }); const cb = document.getelementbyid('checkbox'); const cancelled = !cb.dispatchevent(event); if (cancelled) { // a handler called preventdefault.

User input and controls - Developer guides
for example if you want to add controls when any key gets pressed, you need to add an event listener on the window object: window.addeventlistener("keydown", handlekeydown, true); window.addeventlistener("keyup", handlekeyup, true); where handlekeydown and handlekeyup are the functions implementing the controls about the keydown and keyup events.
... <div draggable="true" ondragstart="event.datatransfer.setdata('text/plain', 'this text may be dragged')">
 this text <strong>may</strong> be dragged.
... 
</div> in which we: set the draggable attribute to true on the element that you wish to make draggable add a listener for the dragstart event and set the drag data within this listener note: you can find more information in the mdn drag & drop documentation.
... <div contenteditable="true">
 this text can be edited by the user.

The Web Open Font Format (WOFF) - Developer guides
it uses a compressed version of the same table-based sfnt structure used by truetype, opentype, and open font format, but adds metadata and private-use data structures, including predefined fields allowing foundries and vendors to provide license information if desired.
... there are three main benefits to using woff: the font data is compressed, so sites using woff will use less bandwidth and will load faster than if they used equivalent uncompressed truetype or opentype files.
... many font vendors that are unwilling to license their truetype or opentype format fonts for use on the web will license woff format fonts.
...it works exactly like opentype and truetype format fonts do, except it will likely let your content download more efficiently due to the addition of compression.

<input>: The Input (Form Input) element - HTML: Hypertext Markup Language
reportvalidity() returns true if the element's value passes validity checks; otherwise, returns false.
... :indeterminate checkbox elements whose indeterminate property is set to true by javascript, radio elements, when all radio buttons with the same name value in the form are unchecked, and <progress> elements in an indeterminate state :valid form controls that can have constraint validation applied and are currently valid.
...the validity object includes: validitystate.valuemissing validitystate.typemismatch validitystate.patternmismatch validitystate.toolong validitystate.tooshort validitystate.rangeunderflow validitystate.rangeoverflow validitystate.stepmismatch validitystate.badinput validitystate.valid validitystate.customerror for each of these boolean properties, a value of true indicates that the specified reason validation may have failed is true, with the exception of the valid property, which is true if the element's value obeys all constraints.
...if there is no custom error message, and none of the other properties return true, valid will be true, and the form can be submitted.

Global attributes - HTML: Hypertext Markup Language
the attribute must take one of the following values: true or the empty string, which indicates that the element must be editable; false, which indicates that the element must not be editable.
...it can have the following values: true, which indicates that the element may be dragged false, which indicates that the element may not be dragged.
...it may have the following values: true, which indicates that the element should be, if possible, checked for spelling errors; false, which indicates that the element should not be checked for spelling errors.
...from html 4.01 specification, the concept of global attributes is introduced and the dir, lang, style, id, class, tabindex, accesskey, and title are now true global attributes.

Browser detection using the user agent - HTTP
problems like these can be avoided by testing for support of the feature itself instead: var islookbehindsupported = false; try { new regexp("(?<=)"); islookbehindsupported = true; } catch (err) { // if the agent doesn't support lookbehinds, the attempted // creation of a regexp object using that syntax throws and // islookbehindsupported remains false.
...ts" in navigator) { hastouchscreen = navigator.maxtouchpoints > 0; } else if ("msmaxtouchpoints" in navigator) { hastouchscreen = navigator.msmaxtouchpoints > 0; } else { var mq = window.matchmedia && matchmedia("(pointer:coarse)"); if (mq && mq.media === "(pointer:coarse)") { hastouchscreen = !!mq.matches; } else if ('orientation' in window) { hastouchscreen = true; // deprecated, but good fallback } else { // only as a last resort, fall back to user agent sniffing var ua = navigator.useragent; hastouchscreen = ( /\b(blackberry|webos|iphone|iemobile)\b/i.test(ua) || /\b(android|windows phone|ipad|ipod)\b/i.test(ua) ); } } if (hastouchscreen) document.getelementbyid("examplebutton").style.pa...
... var ua=navigator.useragent, iswebkit=/\b(ipad|iphone|ipod)\b/.test(ua) && /webkit/.test(ua) && !/edge/.test(ua) && !window.msstream; var mediaqueryupdated = true, mql = []; function whenmediachanges(){mediaqueryupdated = true} var listentomediaquery = iswebkit ?
...function(mq) { for (var i=0,len=mql.length|0; i<len; i=i+1|0) if (mql[i][0] === mq) mql.splice(i, 1); mq.removelistener(whenmediachanges); } : listentomediaquery; var orientationchanged = false; addeventlistener("orientationchange", function(){ orientationchanged = true; }, passive_listener_option); addeventlistener("resize", settimeout.bind(0,function(){ if (orientationchanged && !mediaqueryupdated) for (var i=0,len=mql.length|0; i<len; i=i+1|0) mql[i][1]( mql[i][0] ); mediaqueryupdated = orientationchanged = false; },0)); which part of the user agent contains the information you are looking for?

Atomics - JavaScript
wait and notify the wait() and notify() methods are modeled on linux futexes ("fast user-space mutex") and provide ways for waiting until a certain condition becomes true and are typically used as blocking constructs.
...returns true if an atomic operation on arrays of the given element size will be implemented using a hardware atomic operation (as opposed to a lock).
... examples using atomics const sab = new sharedarraybuffer(1024); const ta = new uint8array(sab); ta[0] = 5; atomics.add(ta, 0, 12); atomics.load(ta, 0); // 12 atomics.and(ta, 0, 1); atomics.load(ta, 0); // 1 atomics.compareexchange(ta, 0, 5, 12); atomics.load(ta, 0); // 12 atomics.exchange(ta, 0, 12); atomics.load(ta, 0); // 12 atomics.islockfree(1); // true atomics.islockfree(2); // true atomics.islockfree(3); // false atomics.islockfree(4); // true atomics.or(ta, 0, 1); atomics.load(ta, 0); // 5 atomics.store(ta, 0, 12); // 12 atomics.sub(ta, 0, 2); atomics.load(ta, 0); // 3 atomics.xor(ta, 0, 1); atomics.load(ta, 0); // 4 waiting and notifiying given a shared int32array: const sab = new sharedarraybuffer(1024); const int32 = new int32arra...
...as long as that is true, it will not go on.

Intl.Locale.prototype.numeric - JavaScript
numeric is a boolean value, which means that it can be either true or false.
...if numeric is set to true, then the locale will take numeric characters into account when collating strings.
...if you want to set numeric to true, simply adding the kn key will suffice.
... let numericviaobj= new intl.locale("en-latn-us", {numeric: true}); console.log(us12hour.numeric); // prints "true" specifications specification ecmascript internationalization api (ecma-402) ...

JSON.stringify() - JavaScript
examples using json.stringify json.stringify({}); // '{}' json.stringify(true); // 'true' json.stringify('foo'); // '"foo"' json.stringify([1, 'false', false]); // '[1,"false",false]' json.stringify([nan, null, infinity]); // '[null,null,null]' json.stringify({ x: 5 }); // '{"x":5}' json.stringify(new date(2006, 0, 2, 15, 4, 5)) // '"2006-01-02t15:04:05.000z"' json.stringify({ x: 5, y: 6 }); // '{"x":5,"y":6}' json.stringif...
....stringify({ [symbol('foo')]: 'foo' }); // '{}' json.stringify({ [symbol.for('foo')]: 'foo' }, [symbol.for('foo')]); // '{}' json.stringify({ [symbol.for('foo')]: 'foo' }, function(k, v) { if (typeof k === 'symbol') { return 'a symbol'; } }); // undefined // non-enumerable properties: json.stringify( object.create(null, { x: { value: 'x', enumerable: false }, y: { value: 'y', enumerable: true } }) ); // '{"y":"y"}' // bigint values throw json.stringify({x: 2n}); // typeerror: bigint value can't be serialized in json the replacer parameter the replacer parameter can be either a function or an array.
... var a = json.stringify({ foo: "bar", baz: "quux" }) //'{"foo":"bar","baz":"quux"}' var b = json.stringify({ baz: "quux", foo: "bar" }) //'{"baz":"quux","foo":"bar"}' console.log(a !== b) // true // some memoization functions use json.stringify to serialize arguments, // which may cause a cache miss when encountering the same object like above example of using json.stringify() with localstorage in a case where you want to store an object created by your user and allowing it to be restored even after the browser has been closed, the following example is a model for the applicability of...
... json.stringify(): // creating an example of json var session = { 'screens': [], 'state': true }; session.screens.push({ 'name': 'screena', 'width': 450, 'height': 250 }); session.screens.push({ 'name': 'screenb', 'width': 650, 'height': 350 }); session.screens.push({ 'name': 'screenc', 'width': 750, 'height': 120 }); session.screens.push({ 'name': 'screend', 'width': 250, 'height': 60 }); session.screens.push({ 'name': 'screene', 'width': 390, 'height': 120 }); session.screens.push({ 'name': 'screenf', 'width': 1240, 'height': 650 }); // converting the json string with json.stringify() // then saving with localstorage in the name of session localstorage.setitem('session', json.stringify(session)); // example of how to transform the string generated through // json.stringify() and saved...

Number.isInteger() - JavaScript
description if the target value is an integer, return true, otherwise return false.
...the method will also return true for floating point numbers that can be represented as integer.
... polyfill number.isinteger = number.isinteger || function(value) { return typeof value === 'number' && isfinite(value) && math.floor(value) === value; }; examples using isinteger number.isinteger(0); // true number.isinteger(1); // true number.isinteger(-100000); // true number.isinteger(99999999999999999999999); // true number.isinteger(0.1); // false number.isinteger(math.pi); // false number.isinteger(nan); // false number.isinteger(infinity); // false number.isinteger(-infinity); // false number.isinteger('10'); // false number.isinteger(true); // false number.isinteger(false); // false number.isinteger([1]); // false number.isinteger(5.0); // true number.isinteger(5.000000000000001); // false number.isinteger(5...
....0000000000000001); // true specifications specification ecmascript (ecma-262)the definition of 'number.isinteger' in that specification.

Number.isNaN() - JavaScript
return value true if the given value is nan and its type is number; otherwise, false.
...this also means that only values of the type number, that are also nan, return true.
... number.isnan = number.isnan || function isnan(input) { return typeof input === 'number' && input !== input; } examples using isnan number.isnan(nan); // true number.isnan(number.nan); // true number.isnan(0 / 0); // true // e.g.
... these would have been true with global isnan() number.isnan('nan'); // false number.isnan(undefined); // false number.isnan({}); // false number.isnan('blabla'); // false // these all return false number.isnan(true); number.isnan(null); number.isnan(37); number.isnan('37'); number.isnan('37.37'); number.isnan(''); number.isnan(' '); specifications specification ecmascript (ecma-262)the definition of 'number.isnan' in that specification.

Object.assign() - JavaScript
polyfill this polyfill doesn't support symbol properties, since es5 doesn't have symbols anyway: if (typeof object.assign !== 'function') { // must be writable: true, enumerable: false, configurable: true object.defineproperty(object, "assign", { value: function assign(target, varargs) { // .length of function is 2 'use strict'; if (target === null || target === undefined) { throw new typeerror('cannot convert undefined or null to object'); } var to = object(target); for (var index = 1; index < arguments.length; i...
...ource = arguments[index]; if (nextsource !== null && nextsource !== undefined) { for (var nextkey in nextsource) { // avoid bugs when hasownproperty is shadowed if (object.prototype.hasownproperty.call(nextsource, nextkey)) { to[nextkey] = nextsource[nextkey]; } } } } return to; }, writable: true, configurable: true }); } examples cloning an object const obj = { a: 1 }; const copy = object.assign({}, obj); console.log(copy); // { a: 1 } warning for deep clone for deep cloning, we need to use alternatives, because object.assign() copies property values.
... }, baz: { value: 3, enumerable: true // baz is an own enumerable property.
... } }); const copy = object.assign({}, obj); console.log(copy); // { baz: 3 } primitives will be wrapped to objects const v1 = 'abc'; const v2 = true; const v3 = 10; const v4 = symbol('foo'); const obj = object.assign({}, v1, null, v2, undefined, v3, v4); // primitives will be wrapped, null and undefined will be ignored.

Object.defineProperties() - JavaScript
data descriptors and accessor descriptors may optionally contain the following keys: configurable true if and only if the type of this property descriptor may be changed and if the property may be deleted from the corresponding object.
... enumerable true if and only if this property shows up during enumeration of the properties on the corresponding object.
... writable true if and only if the value associated with the property may be changed with an assignment operator.
... var keys = object.keys(properties); var descs = []; for (var i = 0; i < keys.length; i++) descs.push([keys[i], converttodescriptor(properties[keys[i]])]); for (var i = 0; i < descs.length; i++) object.defineproperty(obj, descs[i][0], descs[i][1]); return obj; } examples using object.defineproperties var obj = {}; object.defineproperties(obj, { 'property1': { value: true, writable: true }, 'property2': { value: 'hello', writable: false } // etc.

Object.prototype.hasOwnProperty() - JavaScript
note hasownproperty returns true even if the value of the property is null or undefined.
... o = new object(); o.propone = null; o.hasownproperty('propone'); // returns true o.proptwo = undefined; o.hasownproperty('proptwo'); // returns true examples using hasownproperty to test for a property's existence the following example determines whether the o object contains a property named prop: o = new object(); o.hasownproperty('prop'); // returns false o.prop = 'exists'; o.hasownproperty('prop'); // returns true direct vs.
... inherited properties the following example differentiates between direct properties and properties inherited through the prototype chain: o = new object(); o.prop = 'exists'; o.hasownproperty('prop'); // returns true o.hasownproperty('tostring'); // returns false o.hasownproperty('hasownproperty'); // returns false iterating over the properties of an object the following example shows how to iterate over the properties of an object without executing on inherited properties.
...exists that an object might have a property with this name, it is necessary to use an external hasownproperty to get correct results: var foo = { hasownproperty: function() { return false; }, bar: 'here be dragons' }; foo.hasownproperty('bar'); // always returns false // use another object's hasownproperty // and call it with 'this' set to foo ({}).hasownproperty.call(foo, 'bar'); // true // it's also possible to use the hasownproperty property // from the object prototype for this purpose object.prototype.hasownproperty.call(foo, 'bar'); // true note that in the last case there are no newly created objects.

Object - JavaScript
however, an object may be deliberately created for which this is not true (e.g.
... by object.create(null)), or it may be altered so that this is no longer true (e.g.
... examples using object given undefined and null types the following examples store an empty object object in o: let o = new object() let o = new object(undefined) let o = new object(null) using object to create boolean objects the following examples store boolean objects in o: // equivalent to o = new boolean(true) let o = new object(true) // equivalent to o = new boolean(false) let o = new object(boolean()) object prototypes when altering the behavior of existing object.prototype methods, consider injecting code by wrapping your extension before or after the existing logic.
...for example: var person = function(name) { this.name = name; this.cantalk = true; }; person.prototype.greet = function() { if (this.cantalk) { console.log('hi, i am ' + this.name); } }; var employee = function(name, title) { person.call(this, name); this.title = title; }; employee.prototype = object.create(person.prototype); employee.prototype.constructor = employee; //if you don't set object.prototype.constructor to employee, ...

RegExp.prototype.sticky - JavaScript
property attributes of regexp.prototype.sticky writable no enumerable no configurable yes description the value of sticky is a boolean and true if the "y" flag was used; otherwise, false.
... examples using a regular expression with the sticky flag var str = '#foo#'; var regex = /foo/y; regex.lastindex = 1; regex.test(str); // true regex.lastindex = 5; regex.test(str); // false (lastindex is taken into account with sticky flag) regex.lastindex; // 0 (reset after match failure) anchored sticky flag for several versions, firefox's spidermonkey engine had a bug with regard to the ^ assertion and the sticky flag which allowed expressions starting with the ^ assertion and using the sticky flag to match when they shouldn't.
...perhaps because of the bug, the es2015 specification specifically calls out the fact that: when the y flag is used with a pattern, ^ always matches only at the beginning of the input, or (if multiline is true) at the beginning of a line.
... examples of correct behavior: var regex = /^foo/y; regex.lastindex = 2; regex.test('..foo'); // false - index 2 is not the beginning of the string var regex2 = /^foo/my; regex2.lastindex = 2; regex2.test('..foo'); // false - index 2 is not the beginning of the string or line regex2.lastindex = 2; regex2.test('.\nfoo'); // true - index 2 is the beginning of a line specifications specification ecmascript (ecma-262)the definition of 'regexp.prototype.sticky' in that specification.

TypedArray.prototype.every() - JavaScript
return value true if the callback function returns a truthy value for every array element; otherwise, false.
...otherwise, if callback returned a true value for all elements, every will return true.
... function isbigenough(element, index, array) { return element >= 10; } new uint8array([12, 5, 8, 130, 44]).every(isbigenough); // false new uint8array([12, 54, 18, 130, 44]).every(isbigenough); // true testing typed array elements using arrow functions arrow functions provide a shorter syntax for the same test.
... new uint8array([12, 5, 8, 130, 44]).every(elem => elem >= 10); // false new uint8array([12, 54, 18, 130, 44]).every(elem => elem >= 10); // true specifications specification ecmascript (ecma-262)the definition of 'typedarray.prototype.every' in that specification.

Less than (<) - JavaScript
the less than operator (<) returns true if the left operand is less than the right operand, and false otherwise.
... otherwise javascript attempts to convert non-numeric types to numeric values: boolean values true and false are converted to 1 and 0 respectively.
... examples string to string comparison console.log("a" < "b"); // true console.log("a" < "a"); // false console.log("a" < "3"); // false string to number comparison console.log("5" < 3); // false console.log("3" < 3); // false console.log("3" < 5); // true console.log("hello" < 5); // false console.log(5 < "hello"); // false console.log("5" < 3n); // false console.log("3" < 5n); // true number to number comparison console...
....log(5 < 3); // false console.log(3 < 3); // false console.log(3 < 5); // true number to bigint comparison console.log(5n < 3); // false console.log(3 < 5n); // true comparing boolean, null, undefined, nan console.log(true < false); // false console.log(false < true); // true console.log(0 < true); // true console.log(true < 1); // false console.log(null < 0); // false console.log(null < 1); // true console.log(undefined < 3); // false console.log(3 < undefined); // false console.log(3 < nan); // false console.log(nan < 3); // false specifications specification ecmascript (ecma-262)the definition of 'relational operators' in that specification.

yield* - JavaScript
the value of yield* expression itself is the value returned by that iterator when it's closed (i.e., when done is true).
... 1; yield* g1(); yield 5; } const iterator = g2(); console.log(iterator.next()); // {value: 1, done: false} console.log(iterator.next()); // {value: 2, done: false} console.log(iterator.next()); // {value: 3, done: false} console.log(iterator.next()); // {value: 4, done: false} console.log(iterator.next()); // {value: 5, done: false} console.log(iterator.next()); // {value: undefined, done: true} other iterable objects besides generator objects, yield* can also yield other kinds of iterables (e.g., arrays, strings, or arguments objects).
...ole.log(iterator.next()); // {value: 1, done: false} console.log(iterator.next()); // {value: 2, done: false} console.log(iterator.next()); // {value: "3", done: false} console.log(iterator.next()); // {value: "4", done: false} console.log(iterator.next()); // {value: 5, done: false} console.log(iterator.next()); // {value: 6, done: false} console.log(iterator.next()); // {value: undefined, done: true} the value of yield* expression itself yield* is an expression, not a statement—so it evaluates to a value.
...returnvalue = yield* g4(); console.log(g4returnvalue) // 'foo' return g4returnvalue; } const iterator = g5(); console.log(iterator.next()); // {value: 1, done: false} console.log(iterator.next()); // {value: 2, done: false} console.log(iterator.next()); // {value: 3, done: false} done is false because g5 generator isn't finished, only g4 console.log(iterator.next()); // {value: 'foo', done: true} specifications specification ecmascript (ecma-262)the definition of 'yield' in that specification.

yield - JavaScript
in this case, execution of the generator ends and an iteratorresult is returned to the caller in which the value is undefined and done is true.
...in this case, execution of the generator ends and an iteratorresult is returned to the caller in which the value is the value specified by the return statement and done is true.
... let applestore = countapplesales() // generator { } console.log(applestore.next()) // { value: 3, done: false } console.log(applestore.next()) // { value: 7, done: false } console.log(applestore.next()) // { value: 5, done: false } console.log(applestore.next()) // { value: undefined, done: true } you can also send a value with next(value) into the generator.
... 'step' evaluates as a return value in this syntax [rv] = yield [expression] function* counter(value) { let step; while (true) { step = yield ++value; if (step) { value += step; } } } const generatorfunc = counter(0); console.log(generatorfunc.next().value); // 1 console.log(generatorfunc.next().value); // 2 console.log(generatorfunc.next().value); // 3 console.log(generatorfunc.next(10).value); // 14 console.log(generatorfunc.next().value); // 15 console.log(generatorfunc.next(10).value); // 26 specifications specification ecmascript (ecma-262)the definition of 'yield' in that specification.

for - JavaScript
if this expression evaluates to true, statement is executed.
...if omitted, the condition always evaluates to true.
... statement a statement that is executed as long as the condition evaluates to true.
...again, make sure to use a break statement to end the loop and also modify (increase) a variable, so that the condition for the break statement is true at some point.