Download Manager preferences - Archive of obsolete content
there are several preferences used by the download manager.
... preference description browser.download.antivirus.dontclean note: in gecko 1.9.1.
... a boolean value that indicates whether the anti virus software should try to clean a downloaded file when a virus is detected.
...And 25 more matches

Frame script loading and lifetime
loading frame scripts to load a frame script use the loadframescript() function.
... this line of code loads a frame script into the currently selected tab.
... 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.
...And 23 more matches

DownloadList
a downloadlist object represents a collection of download objects that can be viewed and managed by the user interface, and persisted across sessions.
... a reference to a downloadlist object can be obtained using the downloads.getlist() function.
... method overview promise<array<download>> getall(); promise add(download adownload); promise remove(download adownload); promise addview(object aview); promise removeview(object aview); void removefinished([optional] function afilterfn); methods getall() retrieves a snapshot of the downloads that are currently in the list.
...And 22 more matches

nsIDownload
please use downloads.jsm instead.
... toolkit/components/downloads/public/nsidownload.idlscriptable this interface describes a download object.
... download objects are used by the download manager (see nsidownloadmanager to manage files that are queued to download, being downloaded, and finished being downloaded.) inherits from: nsitransfer last changed in gecko 1.9.1 (firefox 3.5 / thunderbird 3.0 / seamonkey 2.0) note: once the download is completed, the download manager stops updating the nsidownload object.
...And 19 more matches

The Download Manager schema - Archive of obsolete content
the download manager uses an sqlite table to keep track of downloads in progress as well as queued and past downloads.
... the table is kept in a database file named "downloads.sqlite", in a table called "moz_downloads".
... this information is available using nsidownloadmanager methods to retrieve nsidownload objects for each download entry; however, if you feel like poking directly into the table, you can do so using the storage api.
...And 18 more matches

nsIFrameScriptLoader
idl file: mozilla-central/source/dom/base/nsimessagemanager.idl inherits from: nsisupports this interface is used to load frame scripts.
... methods void loadframescript(in astring aurl, in boolean aallowdelayedload, [optional] in boolean aruninglobalscope) void removedelayedframescript(in astring aurl); jsval getdelayedframescripts(); loadframescript() load a script in the remote frame.
... frame scripts are loaded as soon as loadframescript() is called.
...And 16 more matches

HTMLImageElement.loading - Web APIs
the htmlimageelement property loading is a string whose value provides a hint to the user agent that tells the browser how to handle loading images which are currently outside the window's visual viewport.
... this helps to optimize the loading of the document's contents by postponing loading the image until it's expected to be needed, rather than immediately during the initial page load.
... syntax let imageloadscheduling = htmlimageelement.loading; htmlimageelement.loading = eagerorlazy; value a domstring providing a hint to the user agent as to how to best schedule the loading of the image to optimize page performance.
...And 14 more matches

nsIProcessScriptLoader
idl file: mozilla-central/source/dom/base/nsimessagemanager.idl inherits from: nsisupports this interface is used by parent process message managers to load scripts into a child process.
... methods void loadprocessscript(in astring aurl, in boolean aallowdelayedload) void removedelayedprocessscript(in astring aurl); jsval getdelayedprocessscripts(); loadprocessscript() load a script in the child process.
... process scripts are loaded as soon as loadprocessscript() is called.
...And 13 more matches

mozIJSSubScriptLoader
js/xpconnect/idl/mozijssubscriptloader.idlscriptable this interface can be used from privileged javascript to load and run javascript code from the given url at runtime.
... 66 introduced gecko 1.0 inherits from: nsisupports last changed in gecko 28 (firefox 28 / thunderbird 28 / seamonkey 2.25 / firefox os 1.3) implemented by: @mozilla.org/moz/jssubscript-loader;1.
... to get this service, use: var mozijssubscriptloader = components.classes["@mozilla.org/moz/jssubscript-loader;1"] .getservice(components.interfaces.mozijssubscriptloader); note: see components.utils.import for another way to import javascript code.
...And 12 more matches

nsIFrameLoader
content/base/public/nsiframeloader.idlscriptable handles loading a frame.
... method overview void activateframeevent(in astring atype, in boolean capture); void activateremoteframe(); void destroy(); void loadframe(); void loaduri(in nsiuri auri); void sendcrossprocesskeyevent(in astring atype, in long akeycode, in long acharcode, in long amodifiers, [optional] in boolean apreventdefault); void sendcrossprocessmouseevent(in astring atype, in float ax, in float ay, in long abutton, in long aclickcount, in long amodifiers, [optional] in boolean aignorerootscrollframe); ...
... attributes attribute type description delayremotedialogs boolean depthtoogreat boolean find out whether the loader's frame is at too great a depth in the frame tree.
...And 12 more matches

Lazy loading - Web Performance
lazy loading is a strategy to identify resources as non-blocking (non-critical) and load these only when needed.
... it's a way to shorten the length of the critical rendering path, which translates into reduced page load times.
... lazy loading can occur on different moments in the application, but it typically happens on some user interactions such as scrolling and navigation.
...And 11 more matches

content/loader - Archive of obsolete content
usage the module exports a constructor for the loader object, which inherits on(), once(), and removelistener() functions that enable its users to listen to events.
... loader adds code to initialize and validate a set of properties for managing content scripts: contenturl contentscript contentscriptfile contentscriptwhen contentscriptoptions allow when certain of these properties are set, the loader emits a propertychange event, enabling its users to take the appropriate action.
... the loader is used by modules that use content scripts but don't themselves load content, such as page-mod.
...And 10 more matches

nsILoadGroup
netwerk/base/public/nsiloadgroup.idlscriptable a load group maintains a collection of nsirequest objects.
...method overview void addrequest(in nsirequest arequest, in nsisupports acontext); void removerequest(in nsirequest arequest, in nsisupports acontext, in nsresult astatus); attributes attribute type description activecount unsigned long returns the count of "active" requests (that is requests without the load_background bit set).
... defaultloadrequest nsirequest accesses the default load request for the group.
...And 10 more matches

Loading Content Scripts - Archive of obsolete content
the constructors for content-script-using objects such as panel and page-mod define a group of options for loading content scripts: contentscript string, array contentscriptfile string, array contentscriptwhen string contentscriptoptions object we have already seen the contentscript option, which enables you to pass in the text of the script itself as a string literal.
... the contentscriptfile option enables you to pass in the local file url from which the content script will be loaded.
...contentscriptfile: data.url("my-content-script.js") both contentscript and contentscriptfile accept an array of strings, so you can load multiple scripts, which can also interact directly with each other in the content process: // "data" is supplied by the "self" module var data = require("sdk/self").data; ...
...And 9 more matches

On page load - Archive of obsolete content
this article is for xul/javascript developers who want to have custom code executed each time a new page is loaded in browser/mail.
... if you need finer control over custom code execution—for example, as documents are loading or when tabs are switched—see progress listeners.
... progress listeners allow extensions to be notified of events associated with documents loading in the browser and with tab switching events.
...And 9 more matches

Safely loading URIs - Archive of obsolete content
not all uri loads are safe.
... for example, loading some file: uris can hang the browser or even crash the operating system in some cases.
...chrome: give the loaded page expanded privileges.
...And 9 more matches

DownloadSummary
provides an aggregated view on the contents of a downloadlist.
... a reference to a downloadsummary object can be obtained using the downloads.getsummary() function.
... method overview promise bindtolist(downloadlist alist); promise addview(object aview); promise removeview(object aview); properties attribute type description allhavestopped read only boolean indicates whether all the downloads are currently stopped.
...And 9 more matches

DownloadTarget
a downloadtarget object represents the target of a download, for example a file in the global downloads directory, or a file in the system temporary directory.
...this is a dynamic property, which is updated when the download is completed or when the download.refresh() method is called.
... partfilepath read only string the path of the ".part" file containing the data downloaded so far, or null to disable the use of a ".part" file to keep partially downloaded data.
...And 9 more matches

HTMLMediaElement.load() - Web APIs
the htmlmediaelement method load() resets the media element to its initial state and begins the process of selecting a media source and loading the media in preparation for playback to begin at the beginning.
... the amount of media data that is prefetched is determined by the value of the element's preload attribute.
...load() will reset the element and rescan the available sources, thereby causing the changes to take effect.
...And 9 more matches

Downloading Files - Archive of obsolete content
the following methods of downloading files may not work as expected after firefox 26, and should no longer be used.
... please use downloads.jsm instead.
... downloading files to download a file, create an instance of nsiwebbrowserpersist and call its nsiwebbrowserpersist.saveuri() method, passing it a url to download and an nsifile instance representing the local file name/path.
...And 8 more matches

imgILoader
modules/libpr0n/public/imgiloader.idlscriptable please add a summary to this article.
... inherits from: nsisupports last changed in gecko 8.0 (firefox 8.0 / thunderbird 8.0 / seamonkey 2.5) implemented by @mozilla.org/image/loader;1 as a service: var imgiloader = components.classes["@mozilla.org/image/loader;1"] .getservice(components.interfaces.imgiloader); method overview imgirequest loadimage(in nsiuri auri, in nsiuri ainitialdocumenturl, in nsiuri areferreruri, in nsiprincipal aloadingprincipal, in nsiloadgroup aloadgroup, in imgidecoderobserver aobserver, in nsisupports acx, in nsloadflags aloadflags, in nsisupports cachekey, in imgirequest arequest, in nsichannelpolicy channelpolicy); imgirequest loadimagewithchannel(in nsichannel achannel, in imgidecoderobserver aobserver, in nsisupports cx, out nsistreamlistener alistener); boolean supportimag...
...ewithmimetype(in string mimetype); constants constant value description load_cors_anonymous 1 << 16 load_cors_use_credentials 1 << 17 methods loadimage() start the load and decode of an image.
...And 8 more matches

loader/sandbox - Archive of obsolete content
usage create a sandbox to create a sandbox: const { sandbox, evaluate, load } = require("sdk/loader/sandbox"); let scope = sandbox('http://example.com'); the argument passed to the sandbox defines its privileges.
... the argument may be: a url string, in which case the sandbox will get the same privileges as a script loaded from that url a dom window object, to inherit privileges from the window being passed.
... evaluate code module provides evaluate function that lets you execute code in the given sandbox: evaluate(scope, 'var a = 5;'); evaluate(scope, 'a + 2;'); //=> 7 more details about evaluated script may be passed via optional arguments that may improve exception reporting: // evaluate code as if it was loaded from 'http://foo.com/bar.js' and // start from 2nd line.
...And 7 more matches

Download Manager improvements in Firefox 3 - Archive of obsolete content
firefox 3 offers improvements to the download manager that allow multiple progress listeners, use of the storage api for data management, download resuming, and more.
... in addition, you can augment or replace the download manager's user interface by implementing the new nsidownloadmanagerui interface.
... note: these changes will require some modest revisions to code using the download manager; several methods have had minor changes.
...And 7 more matches

nsIDownloadManagerUI
toolkit/components/downloads/public/nsidownloadmanagerui.idlscriptable this interface is used to implement the user interface for the download manager.
... if you wish to replace the default download manager user interface, implement this interface.
... 1.0 66 introduced gecko 1.9 inherits from: nsisupports last changed in gecko 1.9 (firefox 3) method overview void getattention(); void show([optional] in nsiinterfacerequestor awindowcontext, [optional] in unsigned long aid, [optional] in short areason); attributes attribute type description visible boolean true if the download manager ui is visible; otherwise false.
...And 7 more matches

Document: DOMContentLoaded event - Web APIs
the domcontentloaded event fires when the initial html document has been completely loaded and parsed, without waiting for stylesheets, images, and subframes to finish loading.
... bubbles yes cancelable yes (although specified as a simple event that isn't cancelable) interface event event handler property none a different event, load, should be used only to detect a fully-loaded page.
... it is a common mistake to use load where domcontentloaded would be more appropriate.
...And 7 more matches

NavigationPreloadManager - Web APIs
the navigationpreloadmanager interface of the the service worker api provides methods for managing the preloading of resources with a service worker.
... methods navigationpreloadmanager.enable() enables navigation preloading and returns a promise that resolves.
... navigationpreloadmanager.disable() disables navigation preloading and returns a promise that resolves.
...And 7 more matches

WindowEventHandlers.onbeforeunload - Web APIs
the onbeforeunload property of the windoweventhandlers mixin is the eventhandler for processing beforeunload events.
... these events fire when a window is about to unload its resources.
... note: to combat unwanted pop-ups, some browsers don't display prompts created in beforeunload event handlers unless the page has been interacted with.
...And 7 more matches

Implementing Download Resuming
this document describes how an embedder or other gecko/necko-using application can implement download resuming.
...this means that if a download was interrupted, it can be resumed from that point on, rather than regetting the whole file.
... not only is the ability to specify a start position important, but it's also important to have some assurance that the file did not change since the initial download attempt.
...And 6 more matches

NSS Certificate Download Specification
binary formats nss's certificate loader will recognize several binary formats.
...following the data should be the following line: -----end certificate----- in a text format download, nss ignores any text before the first begin certificate line, and ignores any text after the first end certificate line.
...for mozilla browsers, this handling will depend upon the mime content-type that is used on the object being downloaded.
...And 6 more matches

Components.utils.unload
components.utils.unload was introduced in firefox 7 and is used to unload javascript code modules.
... this can be particularly handy with restartless (boostrapped) extensions, so that you can unload an old version of a code module when a new version of your add-on is installed.
... once this method has been called, references to the module will continue to work but any subsequent import of the module will reload it and give a new reference.
...And 6 more matches

nsIFrameLoaderOwner
content/base/public/nsiframeloader.idlscriptable represents the owner of an nsiframeloader.
... 1.0 66 introduced gecko 1.8 inherits from: nsisupports last changed in gecko 2.0 (firefox 4 / thunderbird 3.3 / seamonkey 2.1) method overview [noscript, notxpcom] alreadyaddrefed_nsframeloader getframeloader(); void swapframeloaders(in nsiframeloaderowner aotherowner); attributes attribute type description frameloader nsiframeloader the frame loader owned by this nsiframeloaderowner.
... methods getframeloader() returns the frame loader object owned by this object.
...And 6 more matches

Window: load event - Web APIs
the load event is fired when the whole page has loaded, including all dependent resources such as stylesheets and images.
... this is in contrast to domcontentloaded, which is fired as soon as the page dom has been loaded, without waiting for resources to finish loading.
... bubbles no cancelable no interface event event handler property onload examples log a message when the page is fully loaded: window.addeventlistener('load', (event) => { console.log('page is fully loaded'); }); the same, but using the onload event handler property: window.onload = (event) => { console.log('page is fully loaded'); }; live example html <div class="controls"> <button id="reload" type="button">reload</button> </div> <div class="event-log"> <label>event log:</label> <textarea readonly class="event-log-contents" rows="8" cols="30"></textarea> </div> css body { display: grid; grid-template-areas: "control log"; } .controls { grid-area: control; display: flex; align-items: center; justify-cont...
...And 6 more matches

XMLHttpRequest.upload - Web APIs
the xmlhttprequest upload property returns an xmlhttprequestupload object that can be observed to monitor an upload's progress.
... the following events can be triggered on an upload object and used to monitor the upload: event event listener description loadstart onloadstart the upload has begun.
... abort onabort the upload operation was aborted.
...And 6 more matches

system/unload - Archive of obsolete content
experimental register callbacks that are called when a module is unloaded.
... it ensures that this wrapper method is called when the object's module is unloaded.
... the destructor will be called with a single argument describing the reason for the unload; see when().
...And 5 more matches

Customizing the download progress bar - Archive of obsolete content
this example illustrates how to customize the progress bar displayed for a given download in the downloads window.
... first you need to overlay the downloads window so that you can add a new stylesheet.
... in your jar.mn file, add the following (replacing "myextension" with the name of your extension's chrome package): % overlay chrome://mozapps/content/downloads/downloads.xul chrome://myextension/content/downloads-overlay.xul in downloads-overlay.xul, reference the new stylesheet: <?xml version="1.0"?> <?xml-stylesheet href="chrome://myextension/skin/myextension.css" type="text/css"?> <overlay id="mydownloadoverlay" xmlns="http://www.mozilla.org/keymaster/gat...re.is.only.xul"> </overlay> in jar.mn, make sure that there is an asterisk in front of the entry for myextension.css so that it will be preprocessed.
...And 5 more matches

Load the assets and print them on screen - Game development
block) and the preload() function: var ball; note: for the sake of this tutorial, we will use global variables.
... loading the ball sprite loading images and printing them on our canvas is a lot easier using phaser than using pure javascript.
... to load the asset, we will use the game object created by phaser, executing its load.image() method.
...And 5 more matches

nsIDocumentLoader
uriloader/base/nsidocumentloader.idlscriptable this interface responsible for tracking groups of loads that belong together (images, external scripts, and so on.) and subdocuments (iframe, frame, and so on.).
... inherits from: nsisupports last changed in gecko 1.8 (firefox 1.5 / thunderbird 1.5 / seamonkey 1.0) implemented by: @mozilla.org/docloaderservice;1.
... to create an instance, use: var documentloader = components.classes["@mozilla.org/docloaderservice;1"] .createinstance(components.interfaces.nsidocumentloader); method overview void clearparentdocloader(); obsolete since gecko 1.8 void createdocumentloader(out nsidocumentloader aninstance); obsolete since gecko 1.8 void destroy(); obsolete since gecko 1.8 void fireonlocationchange(in nsiwebprogress awebprogress, in nsirequest arequest, in nsiuri auri); obsolete since gecko 1.8 void fireonstatuschange(in nsiwebprogress awebprogress, in nsirequest arequest, in nsresult astatus, in wstring amessage); obsolete since gecko 1.8 void getcontentviewercontainer(in nsisupports adocumentid, out nsicontentviewercontainer aresult)...
...And 5 more matches

WindowEventHandlers.onunload - Web APIs
the onunload property of the windoweventhandlers mixin is the eventhandler for processing unload events.
... these events fire when the window is unloading its content and resources.
... the resource removal is processed after the unload event occurs.
...And 5 more matches

Downloading JSON and JavaScript in extensions - Archive of obsolete content
a common practice found in many extensions is using xmlhttprequest (or some other mechanism) to download javascript or json (they are different) from a remote website.
... once the content has been downloaded, the extension authors proceed to use eval() to decode the string content into javascript objects.
...how could the javascript an extension downloads perform nasty actions?
...And 4 more matches

Tuning Pageload - Archive of obsolete content
tuning pageload can be beneficial if you know what you're doing.
... firefox (and all mozilla products/projects which do page-loading) ship with what are considered the "best" settings for the most cases.
... this document explains which preferences to tweak to affect your pageload time.
...And 4 more matches

reloadWithFlags - Archive of obsolete content
« xul reference home reloadwithflags( flags ) return type: no return value reloads the document in the browser with the given load flags.
... load_flags_none: no special flags.
... the document is loaded normally.
...And 4 more matches

HTMLIFrameElement.download()
the download() method of the htmliframeelement interface downloads a specified url, storing it at /sdcard/download.
... syntax var instanceofdomrequest = instanceofhtmliframeelement.download(url, options); returns a domrequest for handling the download request.
... parameters url the url of the file to be downloaded.
...And 4 more matches

mozbrowserloadend
the mozbrowserloadend event is fired when the browser <iframe> has finished loading all its assets, or has failed to load.
... this can be used when the embedder wants to stop spinning a loading indicator, or update the ui in some other way to indicate loading is complete.
...can be used to make the theme of the surrounding ui complement the theme of the currently loaded content, for example.
...And 4 more matches

DownloadLastDir.jsm
the downloadlastdir.jsm javascript code module lets you retrieve the path of the last directory into which a download occurred.
... to use this, you first need to import the code module into your javascript scope: components.utils.import("resource://gre/modules/downloadlastdir.jsm"); if you are using addon sdk, you can import the code module as: let { cu } = require("chrome"); let downloadlastdir = cu.import("resource://gre/modules/downloadlastdir.jsm").downloadlastdir; once you've imported the module, you can then use the downloadlastdir object it exports.
... using the downloadlastdir object to determine or set the path into which the last download occurred: // file is an nsifile var file = downloadlastdir.file; downloadlastdir.file = file; you can also set and retrieve this information on a site-by-site basis.
...And 4 more matches

nsIDownloader
netwerk/base/public/nsidownloader.idlscriptable a special implementation of a nsistreamlistener that will make the contents of the stream available as a file.
...the resulting file is valid from the time the downloader completes until the last reference to the downloader is released.
... inherits from: nsistreamlistener last changed in gecko 1.7 method overview void init(in nsidownloadobserver observer, in nsifile downloadlocation); methods init() initialize this downloader.
...And 4 more matches

nsIUploadChannel
netwerk/base/public/nsiuploadchannel.idlscriptable a channel may optionally implement this interface if it supports the notion of uploading a data stream.
... the upload stream may only be set prior to the invocation of asyncopen on the channel.
... inherits from: nsisupports last changed in gecko 1.7 method overview void setuploadstream(in nsiinputstream astream, in acstring acontenttype, in long acontentlength); attributes attribute type description uploadstream nsiinputstream get the stream (to be) uploaded by this channel.
...And 4 more matches

GlobalEventHandlers.onload - Web APIs
the onload property of the globaleventhandlers mixin is an eventhandler that processes load events on a window, xmlhttprequest, <img> element, etc.
... the load event fires when a given resource has loaded.
... syntax target.onload = functionref; value functionref is the handler function to be called when the window’s load event fires.
...And 4 more matches

HTMLMediaElement: loadeddata event - Web APIs
the loadeddata event is fired when the frame at the current playback position of the media has finished loading; often the first frame.
... bubbles no cancelable no interface event target element default action none event handler property globaleventhandlers.onloadeddata specification html5 media note that this event will not fire in mobile/tablet devices if data-saver is on in browser settings.
... examples these examples add an event listener for the htmlmediaelement's loadeddata event, then post a message when that event handler has reacted to the event firing.
...And 4 more matches

Window: beforeunload event - Web APIs
the beforeunload event is fired when the window, the document and its resources are about to be unloaded.
... bubbles no cancelable yes interface event event handler property onbeforeunload this event enables a web page to trigger a confirmation dialog asking the user if they really want to leave the page.
... to combat unwanted pop-ups, browsers may not display prompts created in beforeunload event handlers unless the page has been interacted with, or may even not display them at all.
...And 4 more matches

Downloading Nightly or Trunk Builds - Archive of obsolete content
cutting edge firefox downloads.
...so to figure out how to download a cutting edge or bleeding edge or 'beta' version of firefox, you need to look for a "build" (which is developer-speak for the packaged files you can download) of 1.9.1 (the number of the underlying 'platform' called 'gecko' or 'mozilla' that firefox uses).
...the same machines produce about every 24 hours a "nightly" build which can be downloaded by anyone if you know where to get it: these are the nightly builds, and testers all over the world download them and test them, reporting as they go along on any bugs that hit them.
...And 3 more matches

loadURIWithFlags - Archive of obsolete content
« xul reference home loaduriwithflags( uri, flags, referrer, charset, postdata ) return type: no return value load a url into the document, with the specified load flags, the given referrer, character set, and post data.
... in addition to the flags allowed for the reloadwithflags method, the following flags are also valid: load_flags_is_refresh: this flag is used when the url is loaded because of a meta tag refresh or redirect.
... load_flags_is_link: this flag is used when the url is loaded because a user clicked on a link.
...And 3 more matches

FetchEvent.preloadResponse - Web APIs
the preloadresponse read-only property of the fetchevent interface returns a promise that resolves to the navigation preload response if navigation preload was triggered or undefined otherwise.
... syntax var expectedresponse = fetchevent.preloadresponse; value a promise that resolves to a response or otherwise to undefined.
... example this code snippet is from the navigation preload page.
...And 3 more matches

FetchEvent.navigationPreload - Web APIs
the navigationpreload read-only property of the fetchevent interface returns a promise that resolves to the instance of navigationpreloadmanager associated with the current service worker registration.
... syntax var promise = fetchevent.navigationpreload value a promise that resolves to the instance of navigationpreloadmanager.
... example the following example shows the implementation of a fetch event that uses a preloaded response.
...And 3 more matches

FontFaceSetLoadEvent - Web APIs
the fontfacesetloadevent interface of the the css font loading api is fired whenever a fontfaceset loads.
... constructor fontfacesetloadevent() creates a new fontfacesetloadevent object.
... properties fontfacesetloadevent.fontfacesread only returns an array of fontface instances each of which represents a single usable font.
...And 3 more matches

HTMLMediaElement: loadedmetadata event - Web APIs
the loadedmetadata event is fired when the metadata has been loaded.
... bubbles no cancelable no interface event target element default action none event handler property globaleventhandlers.onloadedmetadata specification html5 media additional properties property type description mozchannels read only int the number of channels.
... examples these examples add an event listener for the htmlmediaelement's loadedmetadata event, then post a message when that event handler has reacted to the event firing.
...And 3 more matches

Window: DOMContentLoaded event - Web APIs
the domcontentloaded event fires when the initial html document has been completely loaded and parsed, without waiting for stylesheets, images, and subframes to finish loading.
... bubbles yes cancelable yes (although specified as a simple event that isn't cancelable) interface event event handler property none the original target for this event is the document that has loaded.
...for full details on this event please see the page on the document: domcontentloaded event.
...And 3 more matches

loadGroup - Archive of obsolete content
« xul reference home loadgroup( group ) not in firefox return type: the first tab loads a group of pages into multiple tabs.
... they are either appended or replaced depending on the state of the preference browser.tabs.loadgroup.
... the argument should be an array of objects, one for each document to load.
...And 2 more matches

loadOneTab - Archive of obsolete content
« xul reference home loadonetab( url, referreruri, charset, postdata, loadinbackground, allowthirdpartyfixup ) loadonetab( url, { referreruri: ..., charset: ..., postdata: ..., inbackground: ..., allowthirdpartyfixup: ..., relatedtocurrent: ...
... }) return type: tab element opens a new tab that loads a page with the specified url.
...this method works the same as addtab except for the loadinbackground parameter which allows you to choose whether to open the new tab in foreground or background.
...And 2 more matches

NPN_ReloadPlugins - Archive of obsolete content
« gecko plugin api reference « browser side plug-in api summary reloads all of the installed plugins.
... syntax #include <npapi.h> void npn_reloadplugins(npbool reloadpages);code parameters the function has the following parameter: reloadpages whether to reload pages.
... if true, all pages are reloaded once the plugins are reloaded; otherwise, they aren't.
...And 2 more matches

Page load time - MDN Web Docs Glossary: Definitions of Web-related terms
page load time is the time it takes for a page to load, measured from navigation start to the start of the load event.
... let time = performance.timing; let pageloadtime = time.loadeventstart - time.navigationstart; while page load time 'sounds' like the perfect web performance metric, it isn't.
... load times can vary greatly between users depending on device capabilities, network conditions, and, to a lesser extent, distance from the server.
...And 2 more matches

How do you upload your files to a web server? - Learn web development
to install filezilla go to the filezilla downloads page, click the big download button, then install from the installer file in the usual way.
... uploading to the server our example host instructions told us "to publish on the web, put your files into the public/htdocs directory." you need to navigate to the specified directory in your right pane.
... once you've found the correct remote directory to put your files in, to upload your files to the server you need to drag-and-drop them from the left pane to the right pane.
...And 2 more matches

browser.download.lastDir.savePerSite
browser.download.lastdir.savepersite controls whether the directory preselected in the file picker for saving a file download is being remembered on a per-website (host) base.
... type:boolean default value:true exists by default: no application support:firefox 11.0 status: active; last updated 2012-02-15 introduction: pushed to nightly on 2011-12-11 bugs: bug 702748 values true (default) the last used directory for the website (host) serving the file for download will be preselected in the file picker.
... if no download directory for the current website has been stored, browser.download.lastdir will be used.
...And 2 more matches

PR_LoadLibrary
loads a referenced library.
... syntax #include <prlink.h> prlibrary* pr_loadlibrary(const char *name); parameters the function has this parameter: name a platform-dependent character array that names the library to be loaded, as returned by pr_getlibraryname.
... description this function loads and returns a reference to the specified library.
...And 2 more matches

nsIDownloadHistory
docshell/base/nsidownloadhistory.idlscriptable this interface can be used to add a download to history.
... there is a separate interface specifically for downloads in case embedders choose to track downloads differently from other types of history.
... 1.0 66 introduced gecko 1.9 inherits from: nsisupports last changed in gecko 1.9 (firefox 3) method overview void adddownload(in nsiuri asource, [optional] in nsiuri areferrer, [optional] in prtime astarttime); methods adddownload() adds a download to history.
...And 2 more matches

FontFace.load - Web APIs
the load() method of the fontface interface loads a font based on current object's constructor-passed requirements, including a location or source buffer, and returns a promise that resolves with the current fontface object.
... syntax var promise = fontface.load(); parameters none.
... return value a promise that resolves with a reference to the current fontface object when the font loads or rejects with a networkerror if the loading process fails.
...And 2 more matches

FontFaceSet.load() - Web APIs
the load() method of the fontfaceset forces all the fonts given in parameters to be loaded.
... syntax result = afontfaceset.load(font); result = afontfaceset.load(font, text); returns a promise of an array of fontface loaded.
... the promise is fulfilled when all the fonts are loaded; it is rejected if one of the fonts failed to load.
...And 2 more matches

GlobalEventHandlers.onloadstart - Web APIs
the onloadstart property sets and returns the event handler for the loadstart event.
... syntax element.onloadstart = handlerfunction; var handlerfunction = element.onloadstart; handlerfunction should be either null or a javascript function specifying the handler for the event.
... the loadstart event is fired when progress has begun.
...And 2 more matches

HTMLMediaElement: loadstart event - Web APIs
the loadstart event is fired when the browser has started to load a resource.
... bubbles no cancelable no interface event event handler property onloadstart examples live example html <div class="example"> <button type="button">load video</button> <video controls width="250"></video> <div class="event-log"> <label>event log:</label> <textarea readonly class="event-log-contents"></textarea> </div> </div> css .event-log-contents { width: 18rem; height: 5rem; border: 1px solid black; margin: .2rem; padding: .2rem; } .example { display: grid; grid-template-areas: "button log" "video log"; } button { grid-area: button; width: 10rem; margin: .5rem 0; } video { grid-area: video; } .event-log { grid-area: log; } .event-log>labe...
...l { display: block; } js const loadvideo = document.queryselector('button'); const video = document.queryselector('video'); const eventlog = document.queryselector('.event-log-contents'); let source = null; function handleevent(event) { eventlog.textcontent = eventlog.textcontent + `${event.type}\n`; } video.addeventlistener('loadstart', handleevent); video.addeventlistener('progress', handleevent); video.addeventlistener('canplay', handleevent); video.addeventlistener('canplaythrough', handleevent); loadvideo.addeventlistener('click', () => { if (source) { document.location.reload(); } else { loadvideo.textcontent = "reset example"; source = document.createelement('source'); source.setattribute('src', 'https://interactive-examples.mdn.mozi...
...And 2 more matches

Location: reload() - Web APIs
the location.reload() method reloads the current url, like the refresh button.
... the reload may be blocked and a security_error domexception thrown.
... this happens if the origin of the script calling location.reload() differs from the origin of the page that owns the location object.
...And 2 more matches

Window: unload event - Web APIs
the unload event is fired when the document or a child resource is being unloaded.
... bubbles no cancelable no interface event event handler property onunload it is fired after: beforeunload (cancelable event) pagehide the document is in the following state: all the resources still exist (img, iframe etc.) nothing is visible anymore to the end user ui interactions are ineffective (window.open, alert, confirm, etc.) an error won't stop the unloading workflow please note that the unload event also follows the document tree: parent frame unload will happen before child frame unload (see example below).
... examples <!doctype html> <html> <head> <title>parent frame</title> <script> window.addeventlistener('beforeunload', function(event) { console.log('i am the 1st one.'); }); window.addeventlistener('unload', function(event) { console.log('i am the 3rd one.'); }); </script> </head> <body> <iframe src="child-frame.html"></iframe> </body> </html> below, the content of child-frame.html: <!doctype html> <html> <head> <title>child frame</title> <script> window.addeventlistener('beforeunload', function(event) { console.log('i am the 2nd one.'); }); window.addeventlistener('unload', function(event) { console.log('i am the 4th and last one…'); }); </script> </head> <body> ...
...And 2 more matches

Loading and running WebAssembly code - WebAssembly
}); aside on instantiate() overloads the webassembly.instantiate() function has two overload forms — the one shown above takes the byte code to compile as an argument and returns a promise that resolves to an object containing both the compiled module object, and an instantiated instance of it.
... note: the second overload form takes a webassembly.module object as an argument, and returns a promise directly containing the instance object as the result.
... see second overload example.
...And 2 more matches

Overview of how downloads work - Archive of obsolete content
there are two ways of downloading files in mozilla.
... downloads via the helper app service this diagram is an uml sequence diagram, and was created using dia.
... get the .dia file here: mozilla_downloads.dia downloads via "save link target as" and friends this diagram is an uml sequence diagram, and was created using dia.
... get the .dia file here: mozilla_downloads_path2.dia original document information author: christian biesinger ...

loadResources - Archive of obsolete content
loadresources loads a properties file.
... method of install object syntax object loadresources( string xpipath ); parameters the sole input parameter for loadresources is a string representing the path to the properties file in the xpi in which the key/value pairs are defined.
...description the format of the properties file expected by loadresources is the same as that of the chrome locale .properties files.
... the following lines retrieve the properties as a javascript object and make the values accessible with the familiar "dot property" syntax: reseg2obj = loadresources("bin/res_eg_2.properties"); dump( reseg2obj.title ) ...

XForms Upload Element - Archive of obsolete content
visually, the upload control is shown as a file picker dialog that hides disallowed (filtered) file types.
... the xforms author can set the filter by using the mediatype attribute directly on the upload element or by placing a mediatype element (see the spec) as a direct child of the upload element.
... type restrictions the upload element can be bound to a node of type xsd:anyuri, xsd:base64binary or xsd:hexbinary or any type derived from one of these.
... representations the xforms upload element is represented by visually combining three widgets: a text field that shows the uri of the selected file, a button to open the file picker dialog which allows the user to select a file, and a button to clear the text field and the reference to the file from the bound node (xhtml only).

mozbrowserloadstart
the mozbrowserloadstart event is fired when the browser <iframe> starts to load a new page.
... this can be used when the embedder wants to start spinning a loading indicator, or update the ui in some other way to indicate loading has started.
... example in this example the mozbrowserloadend and mozbrowserloadstart events are used to change the icon shown on the stop/reload button between stop (x) and reload (r), as appropriate.
... var browser = document.queryselector("iframe"); browser.addeventlistener('mozbrowserloadstart',function() { stopreload.textcontent = 'x'; }); browser.addeventlistener('mozbrowserloadend',function() { stopreload.textcontent = 'r'; }); related events mozbrowserasyncscroll mozbrowserclose mozbrowsercontextmenu mozbrowsererror mozbrowsericonchange mozbrowserloadend mozbrowserlocationchange mozbrowseropenwindow mozbrowsersecuritychange mozbrowsershowmodalprompt mozbrowsertitlechange mozbrowserusernameandpasswordrequired ...

HTMLIFrameElement.reload()
the reload() method of the htmliframeelement interface is used to reload the content of the <iframe>.
... syntax instanceofhtmliframeelement.reload(hardreload); returns void.
... parameters hardreload optional a boolean that indicates whether all the resources to reload must be revalidated (true) or may be taken directly from the browser cache (false).
... examples stopreload.addeventlistener('touchend',function() { if(stopreload.textcontent === 'x') { browser.stop(); } else { browser.reload(); } }); specification not part of any specification.

DownloadSource
a downloadsource object represents the source of a download, for example a document or an uri.
... properties attribute type description url read only string the uri for the download source.
... isprivate read only boolean indicates whether the download originated from a private window.
... referrer read only string referrer uri of the download source, or null if no referrer should be sent or the download source is not http.

nglayout.debug.disable xul fastload
the preference nglayout.debug.disable_xul_fastload controls whether or not xul fastload is used.
... never set nglayout.debug.disable_xul_fastload to true in a production environment; it exists solely to aid in debugging.
... bugs: values false (default) xul fastload is used.
... true xul fastload is disabled.

PR_UnloadLibrary
unloads a library loaded with pr_loadlibrary.
... syntax #include <prlink.h> prstatus pr_unloadlibrary(prlibrary *lib); parameters the function has this parameter: lib a reference previously returned from pr_loadlibrary.
... description this function undoes the effect of a pr_loadlibrary.
... after calling this function, future references to the library using its identity as returned by pr_loadlibrary will be invalid.

Rhino downloads archive
see also rhino downloads.
... you can download binary distributions of rhino from http://ftp.mozilla.org/pub/mozilla.org/js/.
... release release date change log download link rhino 1.7r4 2012-06-18 new in rhino 1.7r4 rhino1_7r4.zip rhino 1.7r3 2011-05-09 new in rhino 1.7r3 rhino1_7r3.zip rhino 1.7r2 2009-03-22 new in rhino 1.7r2 rhino1_7r2.zip rhino 1.7r1 2008-03-06 new in rhino 1.7r1 rhino1_7r1.zip rhino 1.6r7 2007-08-20 new in rhino 1.6r7 rhino1_6r7.zip rhino 1.6r6 2007-07-30 new in rhino 1.6r6 rhino1_6r6.zip rhino 1.6r5 2006-11-19 same code as 1.6r4, but relicensed under mpl/gpl.
... if you are looking for js.jar for xslt or for ibm's bean scripting framework (bsf), please read the following note and then download one of the zip files above and unzip it.

BeforeUnloadEvent - Web APIs
the beforeunload event is fired when the window, the document and its resources are about to be unloaded.
...ht="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="38.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">event</text></a><polyline points="76,25 86,20 86,30 76,25" stroke="#d4dde4" fill="none"/><line x1="86" y1="25" x2="116" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/beforeunloadevent" target="_top"><rect x="116" y="1" width="170" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="201" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">beforeunloadevent</text></a></svg></div> a:hover text { fill: #0095dd; pointer-events: all;} bubbles no ...
... cancelable yes target objects defaultview interface event examples window.addeventlistener("beforeunload", function( event ) { event.returnvalue = "\o/"; }); // is equivalent to window.addeventlistener("beforeunload", function( event ) { event.preventdefault(); }); webkit-derived browsers don't follow the spec for the dialog box.
... window.addeventlistener("beforeunload", function (e) { var confirmationmessage = "\o/"; (e || window.event).returnvalue = confirmationmessage; // gecko + ie return confirmationmessage; /* safari, chrome, and other * webkit-derived browsers */ }); specifications specification status comment html living standardthe definition of 'beforeunloadevent' in that specification.

CSS Font Loading API - Web APIs
the css font loading api provides events and interfaces for dynamically loading font resources.
... fontfaceset an interface loading font faces and checking their download statuses.
... fontfacesetloadevent fired whenever a fontfaceset loads.
... specifications specification status comment css font loading module level 3 working draft initial definition.

FetchEvent.isReload - Web APIs
the isreload read-only property of the fetchevent interface returns true if the event was dispatched by the user attempting to reload the page, and false otherwise.
... pressing the refresh button is a reload while clicking a link and pressing the back button is not.
... syntax var reloaded = fetchevent.isreload value a boolean.
... example self.addeventlistener('fetch', function(event) { event.respondwith( if (event.isreload) { //return something } else { //return something else }; ); ​}); ...

GlobalEventHandlers.onloadeddata - Web APIs
the onloadeddata property of the globaleventhandlers mixin is the eventhandler for processing loadeddata events.
... the loadeddata event is fired when the first frame of the media has finished loading.
... syntax element.onloadeddata = handlerfunction; var handlerfunction = element.onloadeddata; handlerfunction is either null or a javascript function specifying the handler for the event.
... specification specification status comment html living standardthe definition of 'onloadeddata' in that specification.

GlobalEventHandlers.onloadedmetadata - Web APIs
the onloadedmetadata property of the globaleventhandlers mixin is the eventhandler for processing loadedmetadata events.
... the loadedmetadata event is fired when the metadata has been loaded.
... syntax element.onloadedmetadata = handlerfunction; var handlerfunction = element.onloadedmetadata; handlerfunction should be either null or a javascript function specifying the handler for the event.
... specification specification status comment html living standardthe definition of 'onloadedmetadata' in that specification.

HTMLAnchorElement.download - Web APIs
the htmlanchorelement.download property is a domstring indicating that the linked resource is intended to be downloaded rather than displayed in the browser.
... note: this value might not be used for download.
... this value cannot be used to determine whether the download will occur.
... syntax var dnload = anchorelt.download; anchorelt.download = dnload; specifications specification status comment html living standardthe definition of 'download' in that specification.

load() - Web APIs
the mediakeysession.load() method returns a promise that resolves to a boolean value after loading data for a specified session object.
... syntax mediakeysession.load(sessionid).then(function(booleanvalue) { ...
... return value a promise that resolves to a boolean indicating whether the load succeeded or failed.
... specifications specification status comment encrypted media extensionsthe definition of 'load()' in that specification.

PerformanceNavigationTiming.domContentLoadedEventEnd - Web APIs
the domcontentloadedeventend read-only property returns a timestamp representing the time value equal to the time immediately after the current document's domcontentloaded event completes.
... syntax perfentry.domcontentloadedeventend; return value a timestamp representing the time value equal to the time immediately after the current document's domcontentloaded event completes.
... function print_nav_timing_data() { // use getentriesbytype() to just get the "navigation" events var perfentries = performance.getentriesbytype("navigation"); for (var i=0; i < perfentries.length; i++) { console.log("= navigation entry[" + i + "]"); var p = perfentries[i]; // dom properties console.log("dom content loaded = " + (p.domcontentloadedeventend - p.domcontentloadedeventstart)); console.log("dom complete = " + p.domcomplete); console.log("dom interactive = " + p.dominteractive); // document load and unload time console.log("document load = " + (p.loadeventend - p.loadeventstart)); console.log("document unload = " + (p.unloadeventend - p.unloadeventstart)); // other properties ...
... console.log("type = " + p.type); console.log("redirectcount = " + p.redirectcount); } } specifications specification status comment navigation timing level 2the definition of 'domcontentloadedeventend' in that specification.

PerformanceNavigationTiming.domContentLoadedEventStart - Web APIs
the domcontentloadedeventstart read-only property returns a timestamp representing the time value equal to the time immediately before the user agent fires the domcontentloaded event at the current document.
... syntax perfentry.domcontentloadedeventstart; return value a timestamp representing the time value equal to the time immediately before the user agent fires the domcontentloaded event at the current document.
... function print_nav_timing_data() { // use getentriesbytype() to just get the "navigation" events var perfentries = performance.getentriesbytype("navigation"); for (var i=0; i < perfentries.length; i++) { console.log("= navigation entry[" + i + "]"); var p = perfentries[i]; // dom properties console.log("dom content loaded = " + (p.domcontentloadedeventend - p.domcontentloadedeventstart)); console.log("dom complete = " + p.domcomplete); console.log("dom interactive = " + p.interactive); // document load and unload time console.log("document load = " + (p.loadeventend - p.loadeventstart)); console.log("document unload = " + (p.unloadeventend - p.unloadeventstart)); // other properties ...
... console.log("type = " + p.type); console.log("redirectcount = " + p.redirectcount); } } specifications specification status comment navigation timing level 2the definition of 'domcontentloadedeventstart' in that specification.

PerformanceNavigationTiming.loadEventEnd - Web APIs
the loadeventend read-only property returns a timestamp which is equal to the time when the load event of the current document is completed.
... syntax perfentry.loadeventend; return value a timestamp representing the time when the load event of the current document is completed.
... function print_nav_timing_data() { // use getentriesbytype() to just get the "navigation" events var perfentries = performance.getentriesbytype("navigation"); for (var i=0; i < perfentries.length; i++) { console.log("= navigation entry[" + i + "]"); var p = perfentries[i]; // dom properties console.log("dom content loaded = " + (p.domcontentloadedeventend - p.domcontentloadedeventstart)); console.log("dom complete = " + p.domcomplete); console.log("dom interactive = " + p.dominteractive); // document load and unload time console.log("document load = " + (p.loadeventend - p.loadeventstart)); console.log("document unload = " + (p.unloadeventend - p.unloadeventstart)); // other properties ...
... console.log("type = " + p.type); console.log("redirectcount = " + p.redirectcount); } } specifications specification status comment navigation timing level 2the definition of 'loadeventend' in that specification.

PerformanceNavigationTiming.loadEventStart - Web APIs
the loadeventstart read-only property returns a timestamp representing the time value equal to the time immediately before the load event of the current document is fired.
... syntax perfentry.loadeventstart; return value a timestamp representing a time value equal to the time immediately before the load event of the current document is fired.
... function print_nav_timing_data() { // use getentriesbytype() to just get the "navigation" events var perfentries = performance.getentriesbytype("navigation"); for (var i=0; i < perfentries.length; i++) { console.log("= navigation entry[" + i + "]"); var p = perfentries[i]; // dom properties console.log("dom content loaded = " + (p.domcontentloadedeventend - p.domcontentloadedeventstart)); console.log("dom complete = " + p.domcomplete); console.log("dom interactive = " + p.interactive); // document load and unload time console.log("document load = " + (p.loadeventend - p.loadeventstart)); console.log("document unload = " + (p.unloadeventend - p.unloadeventstart)); // other properties ...
... console.log("type = " + p.type); console.log("redirectcount = " + p.redirectcount); } } specifications specification status comment navigation timing level 2the definition of 'loadeventstart' in that specification.

PerformanceNavigationTiming.unloadEventEnd - Web APIs
the unloadeventend read-only property returns a timestamp representing the time value equal to the time immediately after the user agent finishes the unload event of the previous document.
... syntax perfentry.unloadeventend; return value a timestamp representing a time value equal to the time immediately after the user agent finishes the unload event of the previous document.
... function print_nav_timing_data() { // use getentriesbytype() to just get the "navigation" events var perfentries = performance.getentriesbytype("navigation"); for (var i=0; i < perfentries.length; i++) { console.log("= navigation entry[" + i + "]"); var p = perfentries[i]; // dom properties console.log("dom content loaded = " + (p.domcontentloadedeventend - p.domcontentloadedeventstart)); console.log("dom complete = " + p.domcomplete); console.log("dom interactive = " + p.interactive); // document load and unload time console.log("document load = " + (p.loadeventend - p.loadeventstart)); console.log("document unload = " + (p.unloadeventend - p.unloadeventstart)); // other properties ...
... console.log("type = " + p.type); console.log("redirectcount = " + p.redirectcount); } } specifications specification status comment navigation timing level 2the definition of 'unloadeventend' in that specification.

PerformanceNavigationTiming.unloadEventStart - Web APIs
the unloadeventstart read-only property returns a timestamp representing the time value equal to the time immediately before the user agent starts the unload event of the previous document.
... syntax perfentry.unloadeventstart; return value a timestamp representing the time value equal to the time immediately before the user agent starts the unload event of the previous document.
... function print_nav_timing_data() { // use getentriesbytype() to just get the "navigation" events var perfentries = performance.getentriesbytype("navigation"); for (var i=0; i < perfentries.length; i++) { console.log("= navigation entry[" + i + "]"); var p = perfentries[i]; // dom properties console.log("dom content loaded = " + (p.domcontentloadedeventend - p.domcontentloadedeventstart)); console.log("dom complete = " + p.domcomplete); console.log("dom interactive = " + p.interactive); // document load and unload time console.log("document load = " + (p.loadeventend - p.loadeventstart)); console.log("document unload = " + (p.unloadeventend - p.unloadeventstart)); // other properties ...
... console.log("type = " + p.type); console.log("redirectcount = " + p.redirectcount); } } specifications specification status comment navigation timing level 2the definition of 'unloadeventstart' in that specification.

ServiceWorkerRegistration.navigationPreload - Web APIs
the navigationpreload read-only property of the serviceworkerregistration interface returns the navigationpreloadmanager associated with the current service worker registration.
... syntax var navigationpreloadmanager = serviceworkerregistration.navigationpreload; value an instance of navigationpreloadmanager.
... specifications specification status comment service workersthe definition of 'navigationpreload' in that specification.
... desktopmobilechromeedgefirefoxinternet exploreroperasafariandroid webviewchrome for androidfirefox for androidopera for androidsafari on iossamsung internetnavigationpreload experimentalchrome full support 59edge full support 17 full support 17 full support 16disabled disabled from version 16: this feature is behind the enable service workers preference.firefox full support ...

XMLDocument.load() - Web APIs
document.load() is a part of an old version of the w3c dom level 3 load & save module.
...as of at least gecko 1.9, this no longer supports cross-site loading of documents (use xmlhttprequest or fetch() instead).
... examples var xmldoc = document.implementation.createdocument("", "test", null); function documentloaded (e) { alert(new xmlserializer().serializetostring(e.target)); // gives querydata.xml contents as string } xmldoc.addeventlistener("load", documentloaded, false); xmldoc.load('querydata.xml'); see also the load sample in the xml tests directory.
... (to test this functionality, create the files on your local disk or on a webserver rather than loading the load.html file from the lxr-generated page, which will serve the text.xml file as html.) specifications old w3c working draft of the dom level 3 load & save module ...

Atomics.load() - JavaScript
the static atomics.load() method returns a value at a given position in the array.
... syntax atomics.load(typedarray, index) parameters typedarray an integer typed array.
... index the position in the typedarray to load from.
... examples using load const sab = new sharedarraybuffer(1024); const ta = new uint8array(sab); atomics.add(ta, 0, 12); atomics.load(ta, 0); // 12 specifications specification ecmascript (ecma-262)the definition of 'atomics.load' in that specification.

Lazy load - MDN Web Docs Glossary: Definitions of Web-related terms
lazy loading is a strategy that delays the loading of some assets (e.g., images) until they are needed by the user based on the user's activity and navigation pattern; typically, these assets are only loaded when they are scrolled into view.
... if correctly implemented, this delay in asset loading is seamless to the user experience and might help improve initial load performance, including time to interactive, as fewer assets are required for the page to start working.
... see also lazy loading ...

ChromeWorkers and the Chrome worker loader
this documentation covers chrome workers and the chrome worker module loader.
... chrome worker modulesthe preferred way to define and load modules for chrome workers is to use the chrome worker module loader.
... this module loader should not surprise developers familiar with commonjs, as it implements a minimal commonjs require().

Download Rhino
rhino is available for download both in source and compiled form.
... binaries release release date change log download link rhino 1.7r4 2012-06-18 new in rhino 1.7r4 rhino1_7r4.zip rhino 1.7r5 2015-01-29 release notes rhino1_7r5.zip rhino 1.7.6 2015-04-15 release notes rhino1.7.6.zip rhino 1.7.7 2015-06-17 release notes rhino1.7.7.zip rhino 1.7.7.1 2016-02-01 release notes rhino1.7.7.1.zip rhino 1.7.7.2 2017-08-24 release notes rhino1.7.7.2.zip rhino 1.7.8 2018-01-22 release notes rhino1.7.8.zip rhino 1.7.9 2018-03-15 release notes rhino1.7.9.zip rhino 1.7.10 2018-04-09 release notes rhino1.7.10.zip rhino 1.7.11 2019-05-30 release notes rhino1.7.11.zip ...
...rhino 1.7.12 2020-01-13 release notes rhino1.7.12.zip to download older rhino versions, see the rhino downloads archive.

nsIDownloadObserver
netwerk/base/public/nsidownloader.idlscriptable please add a summary to this article.
... inherits from: nsisupports last changed in gecko 1.7 method overview void ondownloadcomplete(in nsidownloader downloader, in nsirequest request, in nsisupports ctxt, in nsresult status, in nsifile result); methods ondownloadcomplete() called to signal a download that has completed.
... void ondownloadcomplete( in nsidownloader downloader, in nsirequest request, in nsisupports ctxt, in nsresult status, in nsifile result ); parameters downloader request ctxt status result ...

nsIUploadChannel2
netwerk/base/public/nsiuploadchannel2.idlscriptable please add a summary to this article.
... 1.0 66 introduced gecko 1.9.2 inherits from: nsisupports last changed in gecko 1.9.2 (firefox 3.6 / thunderbird 3.1 / fennec 1.0) method overview void explicitsetuploadstream(in nsiinputstream astream, in acstring acontenttype, in long long acontentlength, in acstring amethod, in boolean astreamhasheaders); methods explicitsetuploadstream() sets a stream to be uploaded by this channel with the specified content-type and content-length header values.
... void explicitsetuploadstream( in nsiinputstream astream, in acstring acontenttype, in long long acontentlength, in acstring amethod, in boolean astreamhasheaders ); parameters astream the stream to be uploaded by this channel.

FileReader: load event - Web APIs
the load event is fired when a file has been read successfully.
... bubbles no cancelable no interface progressevent event handler property filereader.onload examples live example html <div class="example"> <div class="file-select"> <label for="avatar">choose a profile picture:</label> <input type="file" id="avatar" name="avatar" accept="image/png, image/jpeg"> </div> <img src="" class="preview" height="200" alt="image preview..."> <div class="event-log"> <label>event log:</label> <textarea readonly class="event-log-contents"></textarea> </div> </div> css img.preview { margin: 1rem 0; } .event-log-contents { width: 18rem; height: 5rem; border: 1px solid black; margin: .2rem; padding: .2rem; } .exam...
...log>label { display: block; } .event-log-contents { resize: none; } js const fileinput = document.queryselector('input[type="file"]'); const preview = document.queryselector('img.preview'); const eventlog = document.queryselector('.event-log-contents'); const reader = new filereader(); function handleevent(event) { eventlog.textcontent = eventlog.textcontent + `${event.type}: ${event.loaded} bytes transferred\n`; if (event.type === "load") { preview.src = reader.result; } } function addlisteners(reader) { reader.addeventlistener('loadstart', handleevent); reader.addeventlistener('load', handleevent); reader.addeventlistener('loadend', handleevent); reader.addeventlistener('progress', handleevent); reader.addeventlistener('error', handleevent);...

FileReader: loadend event - Web APIs
the loadend event is fired when a file read has completed, successfully or not.
... bubbles no cancelable no interface progressevent event handler property filereader.onloadend examples live example html <div class="example"> <div class="file-select"> <label for="avatar">choose a profile picture:</label> <input type="file" id="avatar" name="avatar" accept="image/png, image/jpeg"> </div> <img src="" class="preview" height="200" alt="image preview..."> <div class="event-log"> <label>event log:</label> <textarea readonly class="event-log-contents"></textarea> </div> </div> css img.preview { margin: 1rem 0; } .event-log-contents { width: 18rem; height: 5rem; border: 1px solid black; margin: .2rem; padding: .2rem; } .e...
...log>label { display: block; } .event-log-contents { resize: none; } js const fileinput = document.queryselector('input[type="file"]'); const preview = document.queryselector('img.preview'); const eventlog = document.queryselector('.event-log-contents'); const reader = new filereader(); function handleevent(event) { eventlog.textcontent = eventlog.textcontent + `${event.type}: ${event.loaded} bytes transferred\n`; if (event.type === "load") { preview.src = reader.result; } } function addlisteners(reader) { reader.addeventlistener('loadstart', handleevent); reader.addeventlistener('load', handleevent); reader.addeventlistener('loadend', handleevent); reader.addeventlistener('progress', handleevent); reader.addeventlistener('error', handleevent);...

FileReader: loadstart event - Web APIs
the loadstart event is fired when a file read operation has begun.
... bubbles no cancelable no interface progressevent event handler property filereader.onloadstart examples live example html <div class="example"> <div class="file-select"> <label for="avatar">choose a profile picture:</label> <input type="file" id="avatar" name="avatar" accept="image/png, image/jpeg"> </div> <img src="" class="preview" height="200" alt="image preview..."> <div class="event-log"> <label>event log:</label> <textarea readonly class="event-log-contents"></textarea> </div> </div> css img.preview { margin: 1rem 0; } .event-log-contents { width: 18rem; height: 5rem; border: 1px solid black; margin: .2rem; padding: .2rem; } ...
...log>label { display: block; } .event-log-contents { resize: none; } js const fileinput = document.queryselector('input[type="file"]'); const preview = document.queryselector('img.preview'); const eventlog = document.queryselector('.event-log-contents'); const reader = new filereader(); function handleevent(event) { eventlog.textcontent = eventlog.textcontent + `${event.type}: ${event.loaded} bytes transferred\n`; if (event.type === "load") { preview.src = reader.result; } } function addlisteners(reader) { reader.addeventlistener('loadstart', handleevent); reader.addeventlistener('load', handleevent); reader.addeventlistener('loadend', handleevent); reader.addeventlistener('progress', handleevent); reader.addeventlistener('error', handleevent);...

FontFace.loaded - Web APIs
the loaded read-only property of the fontface interface returns a promise that resolves with the current fontface object when the font specified in the object's constructor is done loading or rejects with a syntaxerror.
... syntax var apromise = fontface.loaded; value a promise that resolves with the current fontface object.
... specifications specification status comment css font loading module level 3the definition of 'loaded' in that specification.

FontFaceSetLoadEvent.fontfaces - Web APIs
the fontfaces read-only property of the fontfaceloadeventinit interface returns an array of fontface instances, each of which represents a single usable font.
... syntax var fontface[] = fontfacesetloadevent.fontfaces value an array of fontface instance.
... specifications specification status comment css font loading module level 3the definition of 'fontfaces' in that specification.

PerformanceTiming.loadEventEnd - Web APIs
please use the performancenavigationtiming interface's performancenavigationtiming.loadeventend read-only property instead.
... the legacy performancetiming.loadeventend read-only property returns an unsigned long long representing the moment, in miliseconds since the unix epoch, when the load event handler terminated, that is when the load event is completed.
... syntax time = performancetiming.loadeventend; specifications specification status comment navigation timingthe definition of 'performancetiming.loadeventend' in that specification.

PerformanceTiming.loadEventStart - Web APIs
please use the performancenavigationtiming interface's performancenavigationtiming.loadeventstart read-only property instead..
... the legacy performancetiming.loadeventstart read-only property returns an unsigned long long representing the moment, in miliseconds since the unix epoch, when the load event was sent for the current document.
... syntax time = performancetiming.loadeventstart; specifications specification status comment navigation timingthe definition of 'performancetiming.loadeventstart' in that specification.

ProgressEvent.loaded - Web APIs
the progressevent.loaded read-only property is an integer representing the amount of work already performed by the underlying process.
...when downloading a resource using http, this only represent the part of the content itself, not headers and other overhead.
... syntax value = progressevent.loaded specifications specification status comment xmlhttprequestthe definition of 'progressevent.loaded' in that specification.

SVGElement: load event - Web APIs
the load event fires on an svgelement when it is loaded in the browser, e.g.
...it is basically the same as the standard load dom event.
... bubbles no cancelable no interface svgevent event handler property onload examples svgelem.addeventlistener('load', () => { console.log('svg loaded.'); }) specifications specification status comment scalable vector graphics (svg) 2the definition of 'load' in that specification.

XMLHttpRequest: load event - Web APIs
the load event is fired when an xmlhttprequest transaction completes successfully.
... bubbles no cancelable no interface progressevent event handler property onload examples live example html <div class="controls"> <input class="xhr success" type="button" name="xhr" value="click to start xhr (success)" /> <input class="xhr error" type="button" name="xhr" value="click to start xhr (error)" /> <input class="xhr abort" type="button" name="xhr" value="click to start xhr (abort)" /> </div> <textarea readonly class="event-log"></textarea> css .event-log { width: 25rem; height: 4rem; border: 1px solid black; margin: .5rem; padding: .2rem; } input { width: 11rem; margin: .5rem; } js const xhrbuttonsuccess = document.queryselector('.xhr.success'); const xhrbuttonerror = document.
...queryselector('.xhr.error'); const xhrbuttonabort = document.queryselector('.xhr.abort'); const log = document.queryselector('.event-log'); function handleevent(e) { log.textcontent = log.textcontent + `${e.type}: ${e.loaded} bytes transferred\n`; } function addlisteners(xhr) { xhr.addeventlistener('loadstart', handleevent); xhr.addeventlistener('load', handleevent); xhr.addeventlistener('loadend', handleevent); xhr.addeventlistener('progress', handleevent); xhr.addeventlistener('error', handleevent); xhr.addeventlistener('abort', handleevent); } function runxhr(url) { log.textcontent = ''; const xhr = new xmlhttprequest(); addlisteners(xhr); xhr.open("get", url); xhr.send(); return xhr; } xhrbuttonsuccess.addeventlistener('click', () =>...

XMLHttpRequest: loadend event - Web APIs
the loadend event is fired when a request has completed, whether successfully (after load) or unsuccessfully (after abort or error).
... bubbles no cancelable no interface progressevent event handler property onloadend examples live example html <div class="controls"> <input class="xhr success" type="button" name="xhr" value="click to start xhr (success)" /> <input class="xhr error" type="button" name="xhr" value="click to start xhr (error)" /> <input class="xhr abort" type="button" name="xhr" value="click to start xhr (abort)" /> </div> <textarea readonly class="event-log"></textarea> css .event-log { width: 25rem; height: 4rem; border: 1px solid black; margin: .5rem; padding: .2rem; } input { width: 11rem; margin: .5rem; } js const xhrbuttonsuccess = document.queryselector('.xhr.success'); const xhrbuttonerror = docume...
...nt.queryselector('.xhr.error'); const xhrbuttonabort = document.queryselector('.xhr.abort'); const log = document.queryselector('.event-log'); function handleevent(e) { log.textcontent = log.textcontent + `${e.type}: ${e.loaded} bytes transferred\n`; } function addlisteners(xhr) { xhr.addeventlistener('loadstart', handleevent); xhr.addeventlistener('load', handleevent); xhr.addeventlistener('loadend', handleevent); xhr.addeventlistener('progress', handleevent); xhr.addeventlistener('error', handleevent); xhr.addeventlistener('abort', handleevent); } function runxhr(url) { log.textcontent = ''; const xhr = new xmlhttprequest(); addlisteners(xhr); xhr.open("get", url); xhr.send(); return xhr; } xhrbuttonsuccess.addeventlistener('click', ()...

XMLHttpRequest: loadstart event - Web APIs
the loadstart event is fired when a request has started to load data.
... bubbles no cancelable no interface progressevent event handler property onloadstart examples live example html <div class="controls"> <input class="xhr success" type="button" name="xhr" value="click to start xhr (success)" /> <input class="xhr error" type="button" name="xhr" value="click to start xhr (error)" /> <input class="xhr abort" type="button" name="xhr" value="click to start xhr (abort)" /> </div> <textarea readonly class="event-log"></textarea> css .event-log { width: 25rem; height: 4rem; border: 1px solid black; margin: .5rem; padding: .2rem; } input { width: 11rem; margin: .5rem; } js const xhrbuttonsuccess = document.queryselector('.xhr.success'); const xhrbuttonerror = docu...
...ment.queryselector('.xhr.error'); const xhrbuttonabort = document.queryselector('.xhr.abort'); const log = document.queryselector('.event-log'); function handleevent(e) { log.textcontent = log.textcontent + `${e.type}: ${e.loaded} bytes transferred\n`; } function addlisteners(xhr) { xhr.addeventlistener('loadstart', handleevent); xhr.addeventlistener('load', handleevent); xhr.addeventlistener('loadend', handleevent); xhr.addeventlistener('progress', handleevent); xhr.addeventlistener('error', handleevent); xhr.addeventlistener('abort', handleevent); } function runxhr(url) { log.textcontent = ''; const xhr = new xmlhttprequest(); addlisteners(xhr); xhr.open("get", url); xhr.send(); return xhr; } xhrbuttonsuccess.addeventlistener('click', ...

XMLHttpRequestEventTarget.onload - Web APIs
the xmlhttprequesteventtarget.onload is the function called when an xmlhttprequest transaction completes successfully.
... syntax xmlhttprequest.onload = callback; values callback is the function to be executed when the request completes successfully.
... example var xmlhttp = new xmlhttprequest(), method = 'get', url = 'https://developer.mozilla.org/'; xmlhttp.open(method, url, true); xmlhttp.onload = function () { // do something with the retrieved data ( found in xmlhttp.response ) }; xmlhttp.send(); specifications specification status comment xmlhttprequest living standard whatwg living standard ...

XMLHttpRequestEventTarget.onloadstart - Web APIs
the xmlhttprequesteventtarget.onloadstart is the function called when an xmlhttprequest transaction starts transferring data.
... syntax xmlhttprequest.onloadstart = callback; values callback is the function to be called when the transaction begins to transfer data.
... example var xmlhttp = new xmlhttprequest(), method = 'get', url = 'https://developer.mozilla.org/'; xmlhttp.open(method, url, true); xmlhttp.onloadstart = function () { console.log("download underway"); }; xmlhttp.send(); specifications specification status comment xmlhttprequest living standard whatwg living standard ...

:-moz-loading - CSS: Cascading Style Sheets
the :-moz-loading css pseudo-class is a mozilla extension that matches elements that can't be displayed because they have not started loading, such as images that haven't started to arrive yet.
... note that images that are in the process of loading are not matched by this pseudo-class.
... syntax :-moz-loading examples setting a background for images that are loading :-moz-loading { background-color: #aaa; background-image: url(loading-animation.gif) center no-repeat; } specifications not part of any standard.

Link types: preload - HTML: Hypertext Markup Language
the preload keyword for the rel attribute of the <link> element indicates the user is highly likely to require the target resource for the current navigation, and therefore the browser must preemptively fetch and cache the resource.
... see preloading content with rel="preload" for more details.
... specifications specification status comment html living standardthe definition of 'preload' in that specification.

loader/cuddlefish - Archive of obsolete content
the toolkit/loader module should be used instead.
... the sdk's module loader.

Listen for Page Load - Archive of obsolete content
you can get notifications about new pages loading using the tabs module.
... the following add-on listens to the tab's built-in ready event and just logs the url of each tab as the user loads it: require("sdk/tabs").on("ready", logurl); function logurl(tab) { console.log(tab.url); } you will find this console output in the browser console, not the web console.

Uriloader - Archive of obsolete content
uriloader: responsible for the dispatch of content to content handlers as it comes in from the network.
... overview of a uri load up though dispatch to a content handler helper application tech talk mime type determination in mozilla overview of how downloads work ...

image.onload - Archive of obsolete content
« xul reference home image.onload type: script code this event handler will be called on the image element when the image has finished loading.
...if you change the image, the event will fire again when the new image loads.

loadTabs - Archive of obsolete content
« xul reference home loadtabs( uris, loadinbackground, replace ) loadtabs( uris, params ) return type: no return value loads a set of uris, specified by the array uris, into tabs.
... if loadinbackground is true, the tabs are loaded in the background, and if replace is true, the currently displayed tabs are replaced with the specified uris instead of adding new tabs.

nsIXMLHttpRequestUpload
content/base/public/nsixmlhttprequest.idlscriptable this interface provides access to the features needed when uploading data using nsixmlhttprequest.
... 1.0 66 introduced gecko 1.9.1 inherits from: nsidomeventtarget last changed in gecko 1.9.1 (firefox 3.5 / thunderbird 3.0 / seamonkey 2.0) attributes attribute type description onabort nsidomeventlistener onerror nsidomeventlistener onload nsidomeventlistener onloadstart nsidomeventlistener onprogress nsidomeventlistener see also nsixmlhttprequest nsixmlhttprequesteventtarget xmlhttprequest using xmlhttprequest ...

FileReader.onload - Web APIs
the filereader.onload property contains an event handler executed when the load event is fired, when content read with readasarraybuffer, readasbinarystring, readasdataurl or readastext is available.
... example // callback from a <input type="file" onchange="onchange(event)"> function onchange(event) { var file = event.target.files[0]; var reader = new filereader(); reader.onload = function(e) { // the file's text will be printed here console.log(e.target.result) }; reader.readastext(file); } ...

GlobalEventHandlers.onloadend - Web APIs
the onloadend property of the globaleventhandlers mixin is an eventhandler representing the code to be called when the loadend event is raised (when progress has stopped on the loading of a resource.) syntax img.onloadend = funcref; value funcref is the handler function to be called when the resource's loadend event fires.
... examples html content <img src="myimage.jpg"> javascript content // 'loadstart' fires first, then 'load', then 'loadend' image.addeventlistener('load', function(e) { console.log('image loaded'); }); image.addeventlistener('loadstart', function(e) { console.log('image load started'); }); image.addeventlistener('loadend', function(e) { console.log('image load finished'); }); ...

GlobalEventHandlers.onloadstart - Web APIs
the onloadstart property of the globaleventhandlers mixin is an eventhandler representing the code to be called when the loadstart event is raised (when progress has begun on the loading of a resource.) syntax img.onloadstart = funcref; value funcref is the handler function to be called when the resource's loadstart event fires.
... examples html content <img src="myimage.jpg"> javascript content // 'loadstart' fires first, then 'load', then 'loadend' image.addeventlistener('load', function(e) { console.log('image loaded'); }); image.addeventlistener('loadstart', function(e) { console.log('image load started'); }); image.addeventlistener('loadend', function(e) { console.log('image load finished'); }); specifications specification status comment html living standardthe definition of 'onloadstart' in that specification.

PerformanceTiming.domContentLoadedEventEnd - Web APIs
the legacy performancetiming.domcontentloadedeventend read-only property returns an unsigned long long representing the moment, in milliseconds since the unix epoch, right after all the scripts that need to be executed as soon as possible, in order or not, has been executed.
... syntax time = performancetiming.domcontentloadedeventend; specifications specification status comment navigation timingthe definition of 'performancetiming.domcontentloadedeventend' in that specification.

PerformanceTiming.domContentLoadedEventStart - Web APIs
the legacy performancetiming.domcontentloadedeventstart read-only property returns an unsigned long long representing the moment, in miliseconds since the unix epoch, right before the parser sent the domcontentloaded event, that is right after all the scripts that need to be executed right after parsing has been executed.
... syntax time = performancetiming.domcontentloadedeventstart; specifications specification status comment navigation timingthe definition of 'performancetiming.domcontentloadedeventstart' in that specification.

PerformanceTiming.domLoading - Web APIs
the legacy performancetiming.domloading read-only property returns an unsigned long long representing the moment, in miliseconds since the unix epoch, when the parser started its work, that is when its document.readystate changes to 'loading' and the corresponding readystatechange event is thrown.
... syntax time = performancetiming.domloading; specifications specification status comment navigation timingthe definition of 'performancetiming.domloading' in that specification.

PerformanceTiming.unloadEventEnd - Web APIs
the legacy performancetiming.unloadeventend read-only property returns an unsigned long long representing the moment, in miliseconds since the unix epoch, the unload event handler finishes.
... syntax time = performancetiming.unloadeventend; specifications specification status comment navigation timingthe definition of 'performancetiming.unloadeventend' in that specification.

PerformanceTiming.unloadEventStart - Web APIs
the legacy performancetiming.unloadeventstart read-only property returns an unsigned long long representing the moment, in miliseconds since the unix epoch, the unload event has been thrown.
... syntax time = performancetiming.unloadeventstart; specifications specification status comment navigation timingthe definition of 'performancetiming.unloadeventstart' in that specification.

SVGElement: unload event - Web APIs
the unload event is fired when the dom implementation removes an svg document from a window or frame.
... bubbles no cancelable no interface svgevent event handler property onunload examples svgelem.addeventlistener('unload', () => { console.log('svg unloaded.'); }) specifications specification status comment scalable vector graphics (svg) 2the definition of 'unload' in that specification.

::-webkit-file-upload-button - CSS: Cascading Style Sheets
the ::-webkit-file-upload-button css pseudo-element represents the button of an <input> of type="file".
... syntax selector::-webkit-file-upload-button examples html <form> <label for="fileupload">upload file</label><br> <input type="file" id="fileupload"> </form> css input, label { display: block; } input[type=file]::-webkit-file-upload-button { border: 1px solid grey; background: #fffaaa; } below is the example for you to try.

Link types: modulepreload - HTML: Hypertext Markup Language
the modulepreload keyword for the rel attribute of the <link> element provides a declarative way to preemptively fetch a module script and its dependencies, and store them in the document's module map for later evaluation.
... specifications specification status comment html living standardthe definition of 'modulepreload' in that specification.

413 Payload Too Large - HTTP
the http 413 payload too large response status code indicates that the request entity is larger than limits defined by server; the server might close the connection or return a retry-after header field.
... status 413 payload too large specifications specification title rfc 7231, section 6.5.11: 413 payload too large hypertext transfer protocol (http/1.1): semantics and content ...

Page Loading - Archive of obsolete content
page loading on page load how to execute code each time a new page is loaded in browser/mail progress listeners progress listeners allow extensions to be notified of events associated with documents loading in the browser and with tab switching events.

downloading - Archive of obsolete content
the downloading event is fired after checking for an application cache update, if the user agent has found an update and is fetching it, or is downloading the resources listed by the cache manifest for the first time.

onload - Archive of obsolete content
see image.onload prefwindow.onload ...

onpaneload - Archive of obsolete content
« xul reference home onpaneload type: script code code defined here is called when the pane has been loaded, much like the load event for a window.

prefwindow.onload - Archive of obsolete content
« xul reference home prefwindow.onload type: script code when a window finishes loading, it calls this event handler on the prefwindow element.

onunload - Archive of obsolete content
« xul reference home onunload type: script code closing the window calls this event handler on the prefwindow element.

loadURI - Archive of obsolete content
(this one has no post data parameter, see loaduriwithflags for a version that does) loaduri( uri, referrer, charset ) return type: no return value load a url into the document, with the given referrer and character set.

reload - Archive of obsolete content
« xul reference home reload() return type: no return value reloads the document in the browser element on which you call this method.

reloadAllTabs - Archive of obsolete content
« xul reference home reloadalltabs() return type: no return value reloads the contents of all the tabs.

reloadTab - Archive of obsolete content
« xul reference home reloadtab( tab ) return type: no return value reloads the contents of a specific tab.

DownloadError
a downloaderror object provides detailed information about a download failure.

browser.search.context.loadInBackground
browser.search.context.loadinbackground controls whether a search from the context menu with "search <search engine> for <selected text>" opening a new tab will give focus to it and load it in the foreground or keep focus on the current tab and open it in the background.

reader.parse-on-load.force-enabled
the preference reader.parse-on-load.force-enabled controls if the reader mode used in firefox mobile should be enabled independent of the memory available in the device.

canUnload
this content is now available at nsimodule.canunload().

XDomainRequest.onload - Web APIs
syntax xdr.onload = funcref; example var xdr = new xdomainrequest(); xdr.open("post", "http://example.com/api/method"); xdr.onload = function(){ //handle response with xdr.responsetext } xdr.send("param1=value1&param2=value2"); specification not part of any specification.

onunload - XUL
« xul reference home onunload type: script code specifies a set of scripts to execute when the browser window is closed by the user.

Index - Web APIs
requests are guaranteed to be initiated before a page is unloaded and they are run to completion, without requiring a blocking request (for example xmlhttprequest).
... 277 beforeunloadevent api, reference the beforeunload event is fired when the window, the document and its resources are about to be unloaded.
... 392 css font loading api api, cssfontloading, experimental, fonts, needscontent, reference the css font loading api provides events and interfaces for dynamically loading font resources.
...And 181 more matches

Index - Archive of obsolete content
18 interacting with page scripts add-on sdk, add-ons, extensions by default, content scripts loaded by add-ons and scripts loaded by web pages are insulated from each other: 19 loading content scripts no summary!
...unfortunately, javascript does not yet have native support for modules: it has to rely on the host application to provide it with functionality such as loading subscripts, and exporting/ importing names.
... 69 /loader create commonjs module loaders.
...And 102 more matches

nsIDocShell
method overview void addsessionstorage(in nsiprincipal principal, in nsidomstorage storage); void addstate(in nsivariant adata, in domstring atitle, in domstring aurl, in boolean areplace); void beginrestore(in nsicontentviewer viewer, in boolean top); void createaboutblankcontentviewer(in nsiprincipal aprincipal); void createloadinfo(out nsidocshellloadinfo loadinfo); void detacheditorfromwindow(); violates the xpcom interface guidelines void finishrestore(); void firepagehidenotification(in boolean isunload); native code only!
... void fireunloadnotification(); native code only!
...ete since gecko 1.8 nsisimpleenumerator getdocshellenumerator(in long aitemtype, in long adirection); nsidomstorage getsessionstorageforprincipal(in nsiprincipal principal, in domstring documenturi, in boolean create); nsidomstorage getsessionstorageforuri(in nsiuri uri, in domstring documenturi); void historypurged(in long numentries); void internalload(in nsiuri auri, in nsiuri areferrer, in nsisupports aowner, in pruint32 aflags, in wstring awindowtarget, in string atypehint, in nsiinputstream apostdatastream, in nsiinputstream aheadersstream, in unsigned long aloadflags, in nsishentry ashentry, in boolean firstparty, out nsidocshell adocshell, out nsirequest arequest); native code only!
...And 75 more matches

nsIIOService
scheme(in autf8string urlstring); unsigned long getprotocolflags(in string ascheme); nsiprotocolhandler getprotocolhandler(in string ascheme); nsichannel newchannel(in autf8string aspec, in string aorigincharset, in nsiuri abaseuri); obsolete since gecko 48 nsichannel newchannel2(in autf8string aspec, in string aorigincharset, in nsiuri abaseuri, in nsidomnode aloadingnode, in nsiprincipal aloadingprincipal, in nsiprincipal atriggeringprincipal, in uint32_t asecurityflags, in uint32_t acontentpolicytype); nsichannel newchannelfromuri(in nsiuri auri); obsolete since gecko 48 nsichannel newchannelfromuri2(in nsiuri auri, in nsidomnode aloadingnode, in nsiprincipal aloadingprincipal, in nsiprincipal atriggeringprincipal, in unsigned long asec...
...urityflags, in unsigned long acontentpolicytype); nsichannel newchannelfromuriwithloadinfo(in nsiuri auri, in nsiloadinfo aloadinfo); nsichannel newchannelfromuriwithproxyflags2(in nsiuri auri, in nsiuri aproxyuri, in uint32_t aproxyflags,in nsidomnode aloadingnode, in nsiprincipal aloadingprincipal, in nsiprincipal atriggeringprincipal, in uint32_t asecurityflags, in uint32_t acontentpolicytype); nsiuri newfileuri(in nsifile afile); nsiuri newuri(in autf8string aspec, in string aorigincharset, in nsiuri abaseuri); attributes attribute type description offline boolean returns true if networking is in "offline" mode.
... nsichannel newchannel2( in autf8string aspec, in string aorigincharset, in nsiuri abaseuri, in nsidomnode aloadingnode, in nsiprincipal aloadingprincipal, in nsiprincipal atriggeringprincipal, in uint32_t asecurityflags, in uint32_t acontentpolicytype, ); parameters aspec the spec for the desired uri.
...And 64 more matches

How to convert an overlay extension to restartless - Archive of obsolete content
some of that will have to be replaced and the rest will need to be loaded differently.
... step 1: use services.jsm if you load one of mozilla's internal jsm files, for example services.jsm, you'll do so via privileged javascript code like this: components.utils.import("resource://gre/modules/services.jsm"); from here on out, it is assumed you've imported services.jsm somewhere at the top of whatever file you're in and will be using it in all code examples.
...in overlay extensions, you can place a resource mapping in the chrome.manifest for your add-on and load your own jsm from resource:// uris.
...And 45 more matches

Index
this method calls through to that thusly: 47 components.utils.unload modules components.utils.unload was introduced in firefox 7 and is used to unload javascript code modules.
... this can be particularly handy with restartless (boostrapped) extensions, so that you can unload an old version of a code module when a new version of your add-on is installed.
...the following four sections tell the developer how to download and organize the gecko sdk and create a new project in which components like weblock can be created.
...And 45 more matches

Application cache implementation overview
loading a top level document from offline cache this happens in nshttpchannel::opencacheentry().
... all top level document loading (navigation) channels are set chooseapplicationcache flag, which happens in nsdocshell::douriload().
...nsiapplicationcacheservice::chooseapplicationcache is given the url the channel is about to load.
...And 43 more matches

tabbrowser - Archive of obsolete content
tedtab, sessionhistory, tabcontainer, tabs, visibletabs, webbrowserfind, webnavigation, webprogress methods addprogresslistener, addtab, addtabsprogresslistener,appendgroup, getbrowseratindex, getbrowserindexfordocument, getbrowserfordocument, getbrowserfortab, geticon, getnotificationbox, gettabforbrowser, gettabmodalpromptbox, goback, gobackgroup, goforward, 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.
... contentwindow type: todo use the contentwindow.wrappedjsobject to obtain a dom(html) window object currenturi type: nsiuri this read-only property contains the currently loaded url.
... to change the url, use the loaduri method.
...And 41 more matches

tabs - Archive of obsolete content
usage open a tab you can open a new tab, specifying various properties including location: var tabs = require("sdk/tabs"); tabs.open("http://www.example.com"); track tabs you can register event listeners to be notified when tabs open, close, finish loading dom content, or are made active or inactive: var tabs = require("sdk/tabs"); // listen for tab openings.
... tabs.on('open', function onopen(tab) { myopentabs.push(tab); }); // listen for tab content loads.
... tabs.on('ready', function(tab) { console.log('tab is loaded', tab.title, tab.url); }); access tabs the module itself can be used as a list of all opened tabs across all windows.
...And 37 more matches

Event reference
most common categories resource events event name fired when error a resource failed to load.
... abort the loading of a resource has been aborted.
... load a resource and its dependent resources have finished loading.
...And 37 more matches

nsIContentPolicy - Archive of obsolete content
implementations of this interface can be used to control the loading of various types of out-of-line content, or the processing of certain types of inline content.
... 63 introduced gecko 1.0 inherits from: nsicontentpolicybase last changed in gecko 42 (firefox 42 / thunderbird 42 / seamonkey 2.39) you can observe content that is being loaded into your browser by implementing nsicontentpolicy.
... warning: do not block the caller in your implementations of shouldload() or shouldprocess() (for example, by launching a dialog to prompt the user for something).") note: in reality, much of this interface is defined in the nsicontentpolicybase interface, but for now is documented here until someone has time to split things up.
...And 36 more matches

RDF in Mozilla FAQ - Archive of obsolete content
by loading chunks of it into a xul ui from a remote site), don't forget to let mozilla-rdf and the rdf interest group lists know.
... the rdf service manages a table of all loaded datasources.
... datasources may be loaded via the rdf service using the getdatasource() method.
...And 36 more matches

nsIWebNavigation
it provides methods and attributes to direct an object to navigate to a new location, stop or restart an in process load, or determine where the object has previously gone.
... method overview void goback void goforward void gotoindex( in long index ) void loaduri(in wstring uri , in unsigned long loadflags , in nsiuri referrer , in nsiinputstream postdata, in nsiinputstream headers) void reload(in unsigned long reloadflags) void stop(in unsigned long stopflags) constants load flags constant value description load_flags_mask 65535 this flag defines the range of bits that may be specified.
... load_flags_none 0 this is the default value for the load flags parameter.
...And 36 more matches

Modules - Archive of obsolete content
unfortunately, javascript does not yet have native support for modules: it has to rely on the host application to provide it with functionality such as loading subscripts, and exporting/ importing names.
... the module system used by the sdk is based on the commonjs specification: it is implemented using a loader object, which handles all the bookkeeping related to module loading, such as resolving and caching urls.
... we show how to create your own custom loaders, using the loader constructor provided by the sdk.
...And 35 more matches

HTTP Index - HTTP
11 resource urls guide, http, intermediate, resource resource urls, urls prefixed with the resource: scheme, are used by firefox and firefox browser extensions to load resources internally, but some of the information is available to sites the browser connects to as well.
...such requests can be useful to validate the content of a cache, and sparing a useless control, to verify the integrity of a document, like when resuming a download, or when preventing to lose updates when uploading or modifying a document on the server.
... 76 content-security-policy csp, content security policy, http, reference, security, header the http content-security-policy response header allows web site administrators to control resources the user agent is allowed to load for a given page.
...And 33 more matches

panel - Archive of obsolete content
a panel's content is loaded as soon as it is created, before the panel is shown, and the content remains loaded when a panel is hidden, so it is possible to keep a panel around in the background, updating its content as appropriate in preparation for the next time it is shown.
... panel content the panel's content is specified as html, which is loaded from the url supplied in the contenturl option to the panel's constructor.
... you can load remote html into the panel: var mypanel = require("sdk/panel").panel({ width: 180, height: 180, contenturl: "https://en.wikipedia.org/w/index.php?title=jetpack&useformat=mobile" }); mypanel.show(); you can also load html that's been packaged with your add-on, and this is most probably how you will create dialogs.
...And 32 more matches

browser - Archive of obsolete content
are you here looking for information about the firefox web browser, or because you'd like to download the latest version of firefox?
...operties accessibletype, cangoback, cangoforward, contentdocument, contentprincipal, contenttitle, contentvieweredit, contentviewerfile, contentwindow, currenturi, docshell, documentcharsetinfo, homepage, markupdocumentviewer, messagemanager, preferences, securityui, sessionhistory, webbrowserfind, webnavigation, webprogress methods addprogresslistener, 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.
... the type of browser, which can be used to set access of the document loaded inside the browser.
...And 29 more matches

Index - MDN Web Docs Glossary: Definitions of Web-related terms
81 code splitting glossary, reference, web performance, code splitting, latency code splitting is the splitting of code into various bundles or components which can then be loaded on demand or in parallel.
... 84 compile time codingscripting, glossary, javascript the compile time is the time from when the program is first loaded until the program is parsed.
...the dom is a document model loaded in the browser and representing the document as a node tree, where each node represents part of the document (e.g.
...And 29 more matches

Using files from web applications - Web APIs
example: showing file(s) size the following example shows a possible use of the size property: <!doctype html> <html> <head> <meta charset="utf-8"> <title>file(s) size</title> </head> <body> <form name="uploadform"> <div> <input id="uploadinput" type="file" name="myfiles" multiple> selected files: <span id="filenum">0</span>; total size: <span id="filesize">0</span> </div> <div><input type="submit" value="send file"></div> </form> <script> function updatesize() { let nbytes = 0, ofiles = this.files, nfiles = ofiles.length; for (let nfileid = ...
..., "eib", "zib", "yib"]; for (nmultiple = 0, napprox = nbytes / 1024; napprox > 1; napprox /= 1024, nmultiple++) { soutput = napprox.tofixed(3) + " " + amultiples[nmultiple] + " (" + nbytes + " bytes)"; } // end of optional code document.getelementbyid("filenum").innerhtml = nfiles; document.getelementbyid("filesize").innerhtml = soutput; } document.getelementbyid("uploadinput").addeventlistener("change", updatesize, false); </script> </body> </html> using hidden file input elements using the click() method you can hide the admittedly ugly file <input> element and present your own interface for opening the file picker and displaying which file or files the user has selected.
... example: showing thumbnails of user-selected images let's say you're developing the next great photo-sharing website and want to use html to display thumbnail previews of images before the user actually uploads them.
...And 29 more matches

page-worker - Archive of obsolete content
a page worker may be destroyed, after which its memory is freed, and you must create a new instance to load another page.
... you specify the page to load using the contenturl option to the page() constructor.
...so you can rewrite the above code like this: pageworker = require("sdk/page-worker").page({ contentscript: "console.log(document.body.innerhtml);", contenturl: "./myfile.html" }); you can load a new page by setting the page worker's contenturl property.
...And 28 more matches

What is JavaScript? - Learn web development
let's briefly recap the story of what happens when you load a web page in a browser (first talked about in our how css works article).
... when you load a web page in your browser, you are running your code (the html, css, and javascript) inside an execution environment (the browser tab).
...note that the code in your web documents is generally loaded and executed in the order it appears on the page.
...And 27 more matches

Index - Archive of obsolete content
30 browser.type xul attributes, xul reference type: one of the values below.the type of browser, which can be used to set access of the document loaded inside the browser.
... 156 image.onload no summary!
... 234 onload xul attributes, xul reference no summary!
...And 25 more matches

Cross-browser audio basics - Developer guides
s created using the media api basic audio example the code below is an example of a basic audio implementation using html5: <audio controls> <source src="audiofile.mp3" type="audio/mpeg"> <source src="audiofile.ogg" type="audio/ogg"> <!-- fallback for non supporting browsers goes here --> <p>your browser does not support html5 audio, but you can still <a href="audiofile.mp3">download the music</a>.</p> </audio> note: you can also use an mp4 file instead of mp3.
... src contains the path to the audio file to be loaded (relative or absolute).
...in this case, we've provided a simple paragraph including a link to download the audio directly.
...And 25 more matches

page-mod - Archive of obsolete content
instead, keep the script in a separate file and load it using contentscriptfile.
... a page-mod only attaches scripts to documents loaded in tabs.
... contentscriptwhen controls the point during document load at which content scripts are attached.
...And 24 more matches

Perceived performance - Learn web development
how fast a website feels like it's loading and rendering has a greater impact on user experience than how fast the website actually loads and renders.
... even if an operation is going to take a long time (because of latency or or inavailability of the main thread), it is possible to keep the user engaged while they wait by showing a loading spinner, or a series of useful hints and tips (or jokes, or whatever else you think might be appropriate).
... perceived performance the perception of how fast your site loads and how responsive feels to user interaction is vitally important; even more important that actual download time but difficult to quantify.
...And 24 more matches

Using XMLHttpRequest - Web APIs
function reqlistener () { console.log(this.responsetext); } var oreq = new xmlhttprequest(); oreq.addeventlistener("load", reqlistener); oreq.open("get", "http://www.example.org/example.txt"); oreq.send(); types of requests a request made via xmlhttprequest can fetch the data in one of two ways, asynchronously or synchronously.
... var oreq = new xmlhttprequest(); oreq.onload = function(e) { var arraybuffer = oreq.response; // not responsetext /* ...
... load the transfer is complete; all data is now in the response var oreq = new xmlhttprequest(); oreq.addeventlistener("progress", updateprogress); oreq.addeventlistener("load", transfercomplete); oreq.addeventlistener("error", transferfailed); oreq.addeventlistener("abort", transfercanceled); oreq.open(); // ...
...And 24 more matches

Inner-browsing extending the browser navigation paradigm - Archive of obsolete content
this model is also interesting because is optimized to access contextual data instead reloading full web pages.
...an implementation can also use other transport technologies such as soap-based remote procedure calls, xmlhttprequest interfaces, or dom 3 load.
... the second example shows a tabbed menu that dynamically loads news headlines into the current web page.
...And 23 more matches

Client-side storage - Learn web development
saving data and assets locally so a site will be quicker (and potentially less expensive) to download, or be usable without a network connection.
...for example, you could download a batch of music files (perhaps used by a web game or music player application), store them inside a client-side database, and play them as needed.
... the user would only have to download the music files once — on subsequent visits they would be retrieved from the database instead.
...And 23 more matches

Navigation and resource timings - Web Performance
resource timings are detailed network timing measurements regarding the loading of an application's resources.
... the general performance timings below have been deprecated in favor of the performance entry api, which provides for marking and measuring times along the navigation and resource loading process.
... performance timings the performancetiming api, a javascript api for measuring the loading performance of the requested page, is deprecated but supported in all browsers.
...And 23 more matches

Web Performance
web performance is the objective measurements and the perceived user experience of load time and runtime.
... web performance is how long a site takes to load, become interactive and responsive, and how smooth the content is during user interactions - is the scrolling smooth?
...are pop-ups quick to load and display, and do they animate smoothly as they do so?
...And 23 more matches

Content Scripts - Archive of obsolete content
ic principles: the add-on's main code, including "main.js" and other modules in "lib", can use the sdk high-level and low-level apis, but can't access web content directly content scripts can't use the sdk's apis (no access to globals exports, require) but can access web content sdk apis that use content scripts, like page-mod and tabs, provide functions that enable the add-on's main code to load content scripts into web pages content scripts can be loaded in as strings, but are more often stored as separate files under the add-on's "data" directory.
... loading content scripts you can load a single script by assigning a string to either the contentscript or the contentscriptfile option.
... instead, keep the script in a separate file and load it using contentscriptfile.
...And 21 more matches

widget - Archive of obsolete content
scripting widget content to interact with the widget's content you need to load a separate script into the panel.
... you can specify one or more content scripts to load into the widget using the contentscript or contentscriptfile options to the widget() constructor.
... instead, keep the script in a separate file and load it using contentscriptfile.
...And 21 more matches

Migrate apps from Internet Explorer to Mozilla - Archive of obsolete content
<div id="foo">loading...</div> <script> document.getelementbyid("foo").innerhtml = "done."; </script> however, this is not guaranteed.
... to be sure that all elements exist, you should use the onload event handler on the <body> tag: <body onload="dofinish();"> <div id="foo">loading...</div> <script> function dofinish() { var element = document.getelementbyid("foo"); element.innerhtml = "done."; } </script> ...
...one concrete example is window.open, which opens a new window: <script> function doopenwindow(){ var mywindow = window.open("about:blank"); mywindow.location.href = "http://www.ibm.com"; } </script> the problem with the code is that window.open is asynchronous -- it does not block the javascript execution until the window has finished loading.
...And 21 more matches

Listening to events in Firefox extensions - Archive of obsolete content
types of events there are multiple types of events that application and extension authors can use to receive notifications from <xul:browser> and <xul:tabbrowser> elements to hear about changes relating to loads of the content contained within them.
... domcontentloaded dispatched when the initial dom for the page is completely loaded.
... load dispatched after the page—including images—has first finished loading.
...And 20 more matches

Tabbed browser - Archive of obsolete content
each snippet normally includes some code to run at initialization, these are best run using a load listener.
...you can access gbrowser only after the browser window is fully loaded.
... if you need to do something with gbrowser right after the window is opened, listen for the load event and use gbrowser in the event listener.
...And 20 more matches

Python binding for NSS
for information on downloading python-nss releases as tar files, see source download.
... source download area source downloads are maintained here.
... links to download url for a specific release can be found in the release information section.
...And 20 more matches

nsIFaviconService
conuri); obsolete since gecko 22.0 nsiuri getfaviconforpage(in nsiuri apageuri); obsolete since gecko 22.0 nsiuri getfaviconimageforpage(in nsiuri apageuri); obsolete since gecko 22.0 nsiuri getfaviconlinkforicon(in nsiuri afaviconuri); boolean isfailedfavicon(in nsiuri afaviconuri); void removefailedfavicon(in nsiuri afaviconuri); void setandloadfaviconforpage(in nsiuri apageuri, in nsiuri afaviconuri, in boolean aforcereload, in unsigned long afaviconloadtype, [optional] in nsifavicondatacallback acallback); obsolete since gecko 22.0 void setfavicondata(in nsiuri afaviconuri, [const,array,size_is(adatalen)] in octet adata, in unsigned long adatalen, in autf8string amimetype, in prtime aexpiration); obsolete since gecko 22.0 ...
...this cache will also be written to if you use setandloadfaviconforpage() method and it encounters an error while fetching an icon.
...for a normal page with a favicon we've stored, this will be an annotation uri which will then cause the corresponding favicon data to be loaded from this service.
...And 20 more matches

Populating the page: how browsers work - Web Performance
users want web experiences with content that is fast to load and smooth to interact with.
...users want and expect web experiences with content that is fast to load and smooth to interact with.
... latency is our main threat to overcome to ensure a fast load.
...And 20 more matches

Appendix A: Add-on Performance - Archive of obsolete content
this is evident when opening a firefox profile that has many add-ons installed; some profiles can take minutes to load, which is a serious inconvenience for users that gives them a negative view of firefox.
...most add-ons use the load event handler in the main overlay to initialize their objects and sometimes read files or even fetch remote data.
... the problem with the onload event is that it runs before the main window becomes visible, so all handlers need to complete before the user can see the window.
...And 19 more matches

2D maze game with device orientation - Game development
you can create this yourself if you want to follow along: <!doctype html> <html> <head> <meta charset="utf-8" /> <title>cyber orb demo</title> <style> body { margin: 0; background: #333; } </style> <script src="src/phaser-arcade-physics.2.2.2.min.js"></script> <script src="src/boot.js"></script> <script src="src/preloader.js"></script> <script src="src/mainmenu.js"></script> <script src="src/howto.js"></script> <script src="src/game.js"></script> </head> <body> <script> (function() { var game = new phaser.game(320, 480, phaser.canvas, 'game'); game.state.add('boot', ball.boot); game.state.add('preloader', ball.preloader); game.state.add('mainmenu', ball.mainmenu); game.state.add('...
... managing game states the states in phaser are separate parts of the game logic; in our case we’re loading them from independent javascript files for better maintainability.
... the basic states used in this game are: boot, preloader, mainmenu, howto and game.
...And 19 more matches

ui/frame - Archive of obsolete content
communicating with frames you can exchange messages between the main add-on code and scripts loaded into the frame using an api modeled on window.postmessage().
...the data property of the event is the message payload.
..."); var { toolbar } = require("sdk/ui/toolbar"); var frame = new frame({ url: "./city-info.html", onmessage: function(e) { // message only the frame that pinged us e.source.postmessage("pong", e.origin); } }); var toolbar = toolbar({ name: "ping-pong", title: "ping pong", items: [frame] }); this does not have to be the message event: the other events frame can emit: attach, load and ready, also provide access to source and origin.
...And 18 more matches

Handling common JavaScript problems - Learn web development
to install it: install atom (if you haven't got an up-to-date version already installed) — download it from the atom page linked above.
... after the packages have finished installing, try loading up a javascript file: you'll see any issues highlighted with green (for warnings) and red (for errors) circles next to the line numbers, and a separate panel at the bottom provides line numbers, error messages, and sometimes suggested values or other fixes.
...jshint loader for webpack.
...And 18 more matches

Index
this strategy allows nss to work with many hardware devices (e.g., to speed up the calculations required for cryptographic operations, or to access smartcards that securely protect a secret key) and software modules (e.g., to allow to load such modules as a plugin that provides additional algorithms or stores key or trust information) that implement the pkcs#11 interface.
...a recent development adds support for loading external pem files that contain private keys, in a software library called nss-pem, which is separately available, but should eventually become a core part of nss.
...examples are retrieving ocsp (online certificate status protocol) information or downloading a crl (certificate revocation list).
...And 18 more matches

nsIContentPrefService2
pass an nsiloadcontext to use storage appropriate to the context's useprivatebrowsing attribute: if useprivatebrowsing is true, temporary private-browsing storage is used, and otherwise permanent storage is used.
...method overview void addobserverforname(in astring name, in nsicontentprefobserver observer); void getbydomainandname(in astring domain, in astring name, in nsiloadcontext context, in nsicontentprefcallback2 callback); void getbysubdomainandname(in astring domain, in astring name, in nsiloadcontext context, in nsicontentprefcallback2 callback); nsicontentpref getcachedbydomainandname(in astring domain, in astring name, in nsiloadcontext context); void getcachedbysubdomainandname(in astring domain, in astring na...
...me, in nsiloadcontext context, out unsigned long len, [retval,array,size_is(len)] out nsicontentpref prefs); nsicontentpref getcachedglobal(in astring name, in nsiloadcontext context); void getglobal(in astring name, in nsiloadcontext context, in nsicontentprefcallback2 callback); void removealldomains(in nsiloadcontext context, [optional] in nsicontentprefcallback2 callback); void removeallglobals(in nsiloadcontext context, [optional] in nsicontentprefcallback2 callback); void removebydomain(in astring domain, in nsiloadcontext context, [optional] in nsicontentprefcallback2 callback); void removebydomainandname(in astring domain, in astring name, in nsiloadcontext context, [optional] in nsicontentp...
...And 18 more matches

Plug-in Basics - Plugins
with the plug-in api, you can create dynamically loaded plug-ins that can: register one or more mime types draw into a part of a browser window receive keyboard and mouse events obtain data from the network using urls post data to urls add hyperlinks or hotspots that link to new urls draw into sections on an html page communicate with javascript/dom from native code you can see which plug-ins are installed on your system and have been pr...
... when the user opens a page that contains embedded data of a media type that invokes a plug-in, the browser responds with the following sequence of actions: check for a plug-in with a matching mime type load the plug-in code into memory initialize the plug-in create a new instance of the plug-in gecko can load multiple instances of the same plug-in on a single page, or in several open windows at the same time.
...when the last instance of a plug-in is deleted, the plug-in code is unloaded from memory.
...And 18 more matches

Fetching data from the server - Learn web development
previous overview: client-side web apis next another very common task in modern websites and applications is retrieving individual data items from the server to update sections of a webpage without having to load an entire new page.
... originally page loading on the web was simple — you'd send a request for a website to a server, and as long as nothing went wrong, the assets that made the web page would be downloaded and displayed on your computer.
... the trouble with this model is that whenever you want to update any part of the page, for example, to display a new set of products or load a new page, you've got to load the entire page again.
...And 17 more matches

DevTools API - Firefox Developer Tools
return value: a promise that is fulfilled with the toolbox instance once it has been initialized and the selected tool is loaded.
... {toolid}-init(toolbox, iframe) a tool with the given id has began to load in the given toolbox to the given frame.
... getpanelwhenready(toolid) similar to getpanel() but waits for the tool to load first.
...And 17 more matches

Audio and Video Delivery - Developer guides
html audio <audio controls preload="auto"> <source src="audiofile.mp3" type="audio/mpeg"> <!-- fallback for browsers that don't support mp3 --> <source src="audiofile.ogg" type="audio/ogg"> <!-- fallback for browsers that don't support audio tag --> <a href="audiofile.mp3">download audio</a> </audio> the code above will create an audio player that attempts to preload as much audio as possible for smooth playback.
... note: the preload attribute may be ignored by some mobile browsers.
...> <!-- fallback for browsers that don't support mp4 --> <source src="videofile.webm" type="video/webm"> <!-- specifying subtitle files --> <track src="subtitles_en.vtt" kind="subtitles" srclang="en" label="english"> <track src="subtitles_no.vtt" kind="subtitles" srclang="no" label="norwegian"> <!-- fallback for browsers that don't support video tag --> <a href="videofile.mp4">download video</a> </video> the code above creates a video player of dimensions 640x480 pixels, displaying a poster image until the video is played.
...And 17 more matches

Using the application cache - HTML: Hypertext Markup Language
applications that are cached load and work correctly offline, even if users press the refresh button.
... speed cached resources are local, and therefore load faster.
... reduced server load the browser only downloads resources that have changed from the server.
...And 17 more matches

Using the Browser API
demo to demonstrate basic usage of this api, we have created a simple browser api demo that provides buttons allowing you to (re)load web pages, stop loading, move forward and back in history, and zoom in and out of the page.
... to run the demo, the best approach is to clone the github repo locally (or just download it directly if you don't do github), open webide, open the repo as a packaged app, then run it either on a simulator or a real device if you have one.
... in any case, you should at least download the repo and refer to the code as you read the sections below.
...And 16 more matches

HTTP Cache
te memory structures: clear – after it returns, all entries are no longer accessible through the cache apis; the method is fast to execute and non-blocking in any way; the actual erase happens in background purgefrommemory – removes (schedules to remove) any intermediate cache data held in memory for faster access (more about the intermediate cache below) nsiloadcontextinfo distinguishes the scope of the storage demanded to open.
... //github.com/realityripple/uxp/blob/master/netwerk/base/public/nsiloadcontextinfo.idl it is a helper interface wrapping following four arguments into a single one: private-browsing boolean flag anonymous load boolean flag app id number (0 for no app) is-in-browser boolean flag helper functions to create nsiloadcontextinfo objects: c++ consumers: functions at loadcontextinfo.h exported header js consumers: resource://gre/modules/loadcontextinfo.jsm module methods two storage objects created with the same set of nsiloadcontextinfo arguments are identical, containing the same cache entries.
... two storage objects created with in any way different nsiloadcontextinfo arguments are strictly and completely distinct and cache entries in them do not overlap even when having the same uris.
...And 16 more matches

Finishing the Component
the interfaces needed to block certain urls from loading are not frozen, and there is still some debate about how exactly this functionality should be exposed to embedders and component developers, so the apis are not ready to be published.
...when the component is loaded, gecko calls the nsicontentpolicy implementation in weblock on every page load, and this prevents pages from displaying by returning the proper value when the load method is called.
... the web locking policy that we are going to put into place is quite simple: for every load request that comes through, we will ensure that the uri is in the list of "good" urls on the white list.
...And 16 more matches

Using textures in WebGL - Web APIs
our sample loads a copy from a cdn in our html's <head>.
... loading textures the first thing to do is add code to load the textures.
... note: it's important to note that the loading of textures follows cross-domain rules; that is, you can only load textures from sites for which your content has cors approval.
...And 16 more matches

Window - Web APIs
the window interface represents a window containing a dom document; the document property points to the dom document loaded in that window.
... window.stop() this method stops window loading.
... event handlers implemented from elsewhere globaleventhandlers.onabort called when the loading of a resource has been aborted, such as by a user canceling the load while it is still in progress windoweventhandlers.onafterprint called when the print dialog box is closed.
...And 16 more matches

Index of archived content - Archive of obsolete content
dd-on sdk builder guides content scripts communicating with other scripts communicating using "port" communicating using "postmessage" cross-domain content scripts interacting with page scripts loading content scripts reddit example port self contributor's guide classes and inheritance content processes getting started modules private properties ...
...private-browsing querystring request selection self simple-prefs simple-storage system tabs timers ui url widget windows low-level apis /loader chrome console/plain-text console/traceback content/content content/loader content/mod content/symbiont content/worker core/heritage core/namespace core/promise dev/panel event/core event/target ...
... frame/hidden-frame frame/utils fs/path io/byte-streams io/file io/text-streams lang/functional lang/type loader/cuddlefish loader/sandbox net/url net/xhr places/bookmarks places/favicon places/history platform/xpcom preferences/event-target preferences/service remote/child remote/parent stylesheet/style stylesheet/utils system/child_process system/environment system/events system/runtime system/unload system/xul-ap...
...And 15 more matches

Creating a Microsummary - Archive of obsolete content
generators can also be independently downloaded and installed by users if they include a list of pages to which they apply.
... in this tutorial we're going to create a microsummary generator for the spread firefox home page that displays the current firefox download count along with the label fx downloads; for example: 174475447 fx downloads.
... we'll build the xslt transform sheet that converts that page into its microsummary, learn how to specify that the generator applies to that page, and find out how to make the generator available for download and installation.
...And 15 more matches

Venkman Introduction - Archive of obsolete content
when the download is complete, restart your browser (some windows users may also need to restart their computer as well).
...the scripts that have been loaded by the javascript engine appear in the loaded scripts window (for more information about how scripts are loaded and accessed in venkman, see "loading scripts into the debugger").
... the loaded scripts view the loaded scripts view is in the top left portion of the window.
...And 15 more matches

Using XPInstall to Install Plugins - Archive of obsolete content
downloads and installs would be initiated with a security dialog box naming the certificate authority and the signer.
... often, the smartupdate download was triggered via the pluginurl attribute of the embed tag: <embed type="application/x-randomtype" src="myfile.typ" width="50" height="50" pluginurl="http://mytypecompany.xyz/jarpacks/mytypeplugin.jar"></embed> in the example above, the pluginurl attribute points to the signed jar file, which netscape communicator 4.x would then download (subject to the security dialog boxes) if the plugin was not located on the user's machine.
...we will use the term current browser to refer to the browser that initiates the xpinstall download by visiting a site which requires a plugin that the current browser can not find locally.
...And 15 more matches

Message manager overview
at the top level, there are two different sorts of message managers: frame message managers: these enable chrome process code to load a script into a browser frame (essentially, a single browser tab) in the content process.
...from firefox 38 onwards, they also enable code running in the parent process to load process scripts into the child process.
... frame message managers in multiprocess firefox, when chrome code needs to interact with web content, it needs to: factor the code that needs direct access to content into separate scripts, which are called "frame scripts" use a frame message manager to load these frame scripts into the content process use the frame message manager api to communicate with the frame script some older articles on multiprocess firefox and the message manager might refer to "content scripts" instead of "frame scripts".
...And 15 more matches

nsIMsgCloudFileProvider
inherits from: nsisupports method overview void init(in string aaccountkey); void uploadfile(in nsilocalfile afile, in nsirequestobserver acallback); acstring urlforfile(in nsilocalfile afile); void cancelfileupload(in nsilocalfile afile); void refreshuserinfo(in boolean awithui, in nsirequestobserver acallback); void deletefile(in nsilocalfile afile, in nsirequestobserver acallback); void createnewaccount(in acstring aemailaddress, in acstring apassword, in acstring afirstname, in acstring alastname, in nsirequestobserver acallback); void createexistingaccount(in nsire...
... fileuploadsizelimit long readonly: the upper size limit in bytes for a file to be uploaded.
... uploaderr 0x8055311a returned when uploading has failed for an unknown reason.
...And 15 more matches

<video>: The Video Embed element - HTML: Hypertext Markup Language
autoplay a boolean attribute; if specified, the video automatically begins to play back as soon as it can do so without stopping to finish loading the data.
... the allowed values are nodownload, nofullscreen and noremoteplayback.
...setting currenttime sets the current playback position to the given time and seeks the media to that position if the media is currently loaded.
...And 15 more matches

remote/parent - Archive of obsolete content
enables you to load modules, and privileged parts of your add-on in general, into child processes.
... the sdk/remote/parent module enables you to load sdk modules into the child process to give them direct access to content frames.
... these sdk modules have higher privileges than content scripts, and have their own module loader so they can load other sdk modules.
...And 14 more matches

Common causes of memory leaks in extensions - Extensions
all zombie compartments in extensions are caused by a failure to release resources appropriately in certain circumstances, such as when a window is closed, a page unloads, or an extension is disabled or removed.
... to avoid these issues, references to dom nodes in foreign document should instead be stored in an object which is specific to that document, and cleaned up when the document is unloaded, or stored as weak references.
...consider the following example code that could be part of your browser.xul overlay: gbrowser.addeventlistener("domcontentloaded", function(evt) { var contentdoc = evt.originaltarget; var i = 0; // refresh the title once each second setinterval(function() { contentdoc.title = ++i; }, 1000); }, false); one would normally expect that the interval (or timer) would be destroyed as soon as the document unloads, in the same way that event listeners are automatically destroyed.
...And 14 more matches

The "why" of web performance - Learn web development
web performance refers to how quickly site content loads and renders in a web browser, and how well it responds to user interaction.
...while an individual's perception of site performance performance is subjective, loading and rendering can be measured.
... as an example, consider the loading experience of cnn.com, which at the time of this writing had over 400 http requests with a file size of over 22.6mb.
...And 14 more matches

Introduction to automated testing - Learn web development
automation makes things easy throughout this module we have detailed loads of different ways in which you can test your websites and apps, and explained the sort of scope your cross-browser testing efforts should have in terms of what browsers to test, accessibility considerations, and more.
... setting up node and npm most tools these days are based on node.js, so you'll need to install it from nodejs.org: download the installer for your system from the above site.
...to update node, the most reliable way is to download and install an updated installer package from their website (see link above).
...And 14 more matches

XUL Overlays
loading overlays overlays can be loaded explicitly or dynamically.
... when you load an overlay explicitly, it means that you intend to make it available every time the base file is loaded.
... since one of the main purposes of overlays is to provide ui for additions or components to the basic package, explicit loading can be somewhat problematic when the overlay defines optional ui elements.
...And 14 more matches

Window.open() - Web APIs
the window interface's open() method loads the specified resource into the new or existing browsing context (window, <iframe> or tab) with the specified name.
... if the name doesn't exist, then a new browsing context is opened in a new tab or a new window, and the specified resource is loaded into it.
... syntax var window = window.open(url, windowname, [windowfeatures]); parameters url a domstring indicating the url of the resource to be loaded.
...And 14 more matches

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.
... line 3 creates an event handler function object and assigns it to the request's onload attribute.
... function xhrsuccess() { this.callback.apply(this, this.arguments); } function xhrerror() { console.error(this.statustext); } function loadfile(url, callback /*, opt_arg1, opt_arg2, ...
...And 14 more matches

Index - HTTP
28 content-security-policy csp, http, reference, security, header the http content-security-policy response header allows web site administrators to control resources the user agent is allowed to load for a given page.
... 30 csp: block-all-mixed-content csp, directive, http, mixed content, reference, security the http content-security-policy (csp) block-all-mixed-content directive prevents loading any assets using http when the page is loaded using https.
... 31 csp: child-src csp, directive, http, reference, security the deprecated http content-security-policy (csp) child-src directive defines the valid sources for web workers and nested browsing contexts loaded using elements such as <frame> and <iframe>.
...And 14 more matches

Audio for Web games - Game development
this is usually mitigated against by loading the audio in advance and priming it on a user-initiated event.
... for more passive audio auto play, for example background music that starts as soon as a game loads, one trick is to detect any user initiated event and start playback then.
... buffering and preloading likely as an attempt to mitigate runaway mobile network data use, we also often find that buffering is disabled before playback has been initiated.
...And 13 more matches

Multimedia: Images - Learn web development
previous overview: performance next media, namely images and video, account for over 70% of the bytes downloaded for the average website.
... in terms of download performance, eliminating media, and reducing file size is the low-hanging fruit.
... objective: to learn about the various image formats, their impact on performance, and how to reduce the impact of images on overall page load time.
...And 13 more matches

Storage access policy: Block cookies from trackers
second, firefox uses an additional "entity list", which prevents domains from being classified as trackers when they are loaded on a top-level site owned by the same organization.
... the storage access policy blocks resources identified as trackers from accessing their cookies and other site storage when they are loaded in a third-party context.
... origins classified as trackers will have access to their own storage when they are loaded in a first-party context.
...And 13 more matches

nsIApplicationUpdateService
it also provides utilities for selecting and downloading update patches.
... 1.0 66 introduced gecko 1.8 inherits from: nsisupports last changed in gecko 2.0 (firefox 4 / thunderbird 3.3 / seamonkey 2.1) method overview void adddownloadlistener(in nsirequestobserver listener); astring downloadupdate(in nsiupdate update, in boolean background); void pausedownload(); void removedownloadlistener(in nsirequestobserver listener); nsiupdate selectupdate([array, size_is(updatecount)] in nsiupdate updates, in unsigned long updatecount); attributes attribute type description backgroundchecker nsiupdatechecker the update checker being used for background update checking.
... canapplyupdates boolean true if the update service can download and install updates.
...And 13 more matches

URLs - Plugins
« previousnext » this chapter describes retrieving urls and displaying them on specified target pages, posting data to an http server, uploading files to an ftp server, and sending mail.
... ftp (file transfer protocol) locates files and directories on internet hosts for file download.
...if target refers to the window or frame containing the plug-in instance, it is destroyed and the plug-in may be unloaded.
...And 13 more matches

HTMLMediaElement - Web APIs
the domtokenlist takes one or more of three possible values: nodownload, nofullscreen, and noremoteplayback.
...the best time to set a new length is after the loadedmetadata event fires, when the audio info is known, but before the audio has started or mozaudioavailable events have begun firing.
... htmlmediaelement.preload is a domstring that reflects the preload html attribute, indicating what data should be preloaded, if any.
...And 13 more matches

<link>: The External Resource Link element - HTML: Hypertext Markup Language
you can also provide a media type or query inside a media attribute; this resource will then only be loaded if the media condition is true.
...take this example: <link rel="preload" href="myfont.woff2" as="font" type="font/woff2" crossorigin="anonymous"> a rel value of preload indicates that the browser should preload this resource (see preloading content with rel="preload" for more details), with the as attribute indicating the specific class of content being fetched.
...if you encounter problems with the favicon not loading, verify that the content-security-policy header's img-src directive is not preventing access to it.
...And 13 more matches

content/symbiont - Archive of obsolete content
used by sdk modules that can load web content and attach content scripts to it.
... usage a symbiont loads the specified contenturl and content scripts into a frame, and sets up an asynchronous channel between the content scripts and the add-on code, enabling them to exchange messages using the port or postmessage apis.
... this trait is composed from the loader and worker traits.
...And 12 more matches

ui/sidebar - Archive of obsolete content
to show what a sidebar looks like, here's a sidebar that displays the results of running the w3c validator on the current page: specifying sidebar content the content of a sidebar is specified using html, which is loaded from the url supplied in the url option to the sidebar's constructor.
... unlike modules such as panel, the content must be local, typically loaded from the add-on's data directory via a url constructed using self.data.url(): var sidebar = require("sdk/ui/sidebar").sidebar({ id: 'my-sidebar', title: 'my sidebar', url: require("sdk/self").data.url("sidebar.html") }); from firefox 34, you can use "./sidebar.html" as an alias for self.data.url("sidebar.html").
... communicating with sidebar scripts you can't directly access your sidebar's content from your main add-on code, but you can send messages between your main add-on code and scripts loaded into your sidebar.
...And 12 more matches

Using Dependent Libraries In Extension Components - Archive of obsolete content
the firefox extension system does not provide automatic support for loading these dependent libraries, but it is possible to load these libraries explicitly using a component stub.
... the basic strategy of the stub is to dynamically load the dependent libraries, then load the component library and continue registration.
...srcdir = @srcdir@ topsrcdir = @top_srcdir@ vpath = @srcdir@ include $(depth)/config/autoconf.mk module = bsmedberg library_name = bsmedberg_stub is_component = 1 force_shared_lib = 1 requires = \ xpcom \ string \ $(null) cppsrcs = bdsstubloader.cpp extra_dso_ldopts += \ $(dist)/lib/$(lib_prefix)xpcomglue_s.$(lib_suffix) \ $(xpcom_frozen_ldopts) \ $(nspr_libs) \ $(null) include $(topsrcdir)/config/rules.mk defines += -dmoz_dll_prefix=\"$(dll_prefix)\" extensions/stub/bdsstubloader.cpp // copyright (c) 2005 benjamin smedberg <benjamin@smedbergs.us> #include "nscore.h" #include "nsmodule.h" #include "prlink.h" #include "ns...
...And 12 more matches

Using gdb on wimpy computers - Archive of obsolete content
if your computer has less than 256 mb of memory, your computer will become unhappy as gdb loads mozilla's shared libraries.
... the solution to this is to delay loading shared libraries until they are actually needed.
... however, you need to make sure that the base libraries like libc and pthreads are loaded before you tell gdb to stop loading shared libraries.
...And 12 more matches

What is web performance? - Learn web development
does the site load quickly, allow the user to start interacting with it quickly, and offer reassuring feedback if something is taking time to load (e.g.
... a loading spinner)?
...this includes the following major areas: reducing overall load time: how long does it take the files required to render the web site to download on to the user's computer?
...And 12 more matches

Following the Android Toasts Tutorial from a JNI Perspective
let sig = { context: 'landroid/content/context;', charsequence; 'ljava/lang/charsequence;', int: 'i', toast: 'landroid/widget/toast;', void: 'v', }; get java environment before we go on to declare the other important features, we need to load our environment variable.
... we want to wrap this in a try-catch statement so if any errors occur we make sure to unload the classes and the java environment, this is good for performance.
... this is the template that will follow our object of signatures: var my_jenv = null; try { my_jenv = jni.getforthread(); // do the jni work here } finally { if (my_jenv) { jni.unloadclasses(my_jenv); } } the reason we choose my_jenv for a variable name, and not jenv, is because the global privileged window scope of firefox for android has a variable jenv already, and we don't want to mix.
...And 12 more matches

nsIMsgDBView
nsmsgviewindex index); nsimsgdbview clonedbview(in nsimessenger amessengerinstance, in nsimsgwindow amsgwindow, in nsimsgdbviewcommandupdater acommandupdater); void geturisforselection([array, size_is(count)] out string uris, out unsigned long count); void getindicesforselection([array, size_is(count)] out nsmsgviewindex indices, out unsigned long count); void loadmessagebymsgkey(in nsmsgkey amsgkey); void loadmessagebyviewindex(in nsmsgviewindex aindex); void loadmessagebyurl(in string aurl); void reloadmessage(); void reloadmessagewithallparts(); void selectmsgbykey(in nsmsgkey key); void selectfoldermsgbykey(in nsimsgfolder afolder, in nsmsgkey akey); void ondeletecompleted(in boolean succeed...
...used during folder loading.
... return values acount upon return, the count variable may contain the number of messages loaded.
...And 12 more matches

nsIWebBrowserPersist
afile); void savedocument(in nsidomdocument adocument, in nsisupports afile, in nsisupports adatapath, in string aoutputcontenttype, in unsigned long aencodingflags, in unsigned long awrapcolumn); void saveuri(in nsiuri auri, in nsisupports acachekey, in nsiuri areferrer, in long areferrerpolicy, in nsiinputstream apostdata, in string aextraheaders, in nsisupports afile, in nsiloadcontext aprivacycontext); void saveprivacyawareuri(in nsiuri auri, in nsisupports acachekey, in nsiuri areferrer, in long areferrerpolicy, in nsiinputstream apostdata, in string aextraheaders, in nsisupports afile, in boolean aisprivate); attributes attribute type description currentstate unsigned long current state of the persister object.
...the object that the embbedder supplies may also implement nsiinterfacerequestor and be prepared to return nsiauthprompt or other interfaces that may be required to download data.
...this flag does nothing for failed upload operations to remote servers.
...And 12 more matches

nsIWebProgressListener
uriloader/base/nsiwebprogresslistener.idlscriptable this interface is implemented by clients wishing to listen in on the progress associated with the loading of asynchronous requests in the context of a nsiwebprogress instance as well as any child nsiwebprogress instances.
... void onstatechange(in nsiwebprogress awebprogress, in nsirequest arequest, in unsigned long astateflags, in nsresult astatus); void onstatuschange(in nsiwebprogress awebprogress, in nsirequest arequest, in nsresult astatus, in wstring amessage); constants state transition flags these flags indicate the various states that requests may transition through as they are being loaded.
...a document request supports the nsichannel interface and its loadflags attribute includes the nsichannel::load_document_uri flag.
...And 12 more matches

about:debugging - Firefox Developer Tools
this firefox provides information about temporary extensions you have loaded for debugging, extensions that are installed in firefox, the tabs that you currently have open, and service workers running on firefox.
...you can also reload the page by clicking the reload button next to the url bar, and (starting 79), navigate backward or forward in the browsing history with the back and forward buttons.
...when you do, it is added to the network locations list along with the devices, as shown below: this firefox the this firefox tab combines the features of extensions, tabs, and workers into a single tab with the following sections: temporary extensions displays a list of the extensions that you have loaded using the load temporary add-on button.
...And 12 more matches

Using images - Web APIs
by using one of: the document.images collection the document.getelementsbytagname() method if you know the id of the specific image you wish to use, you can use document.getelementbyid() to retrieve that specific image using images from other domains using the crossorigin attribute of an <img> element (reflected by the htmlimageelement.crossorigin property), you can request permission to load an image from another domain for use in your call to drawimage().
...to do this, you can use the convenient image() constructor: var img = new image(); // create new img element img.src = 'myimage.png'; // set source path when this script gets executed, the image starts loading.
... if you try to call drawimage() before the image has finished loading, it won't do anything (or, in older browsers, may even throw an exception).
...And 12 more matches

Writing WebSocket servers - Web APIs
websocket servers are often separate and specialized servers (for load-balancing or other practical reasons), so you will often use a reverse proxy (such as a regular http server) to detect websocket handshakes, pre-process them, and send those clients to a real websocket server.
... format each data frame (from the client to the server or vice-versa) follows this same format: frame format: ​​ 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-------+-+-------------+-------------------------------+ |f|r|r|r| opcode|m| payload len | extended payload length | |i|s|s|s| (4) |a| (7) | (16/64) | |n|v|v|v| |s| | (if payload len==126/127) | | |1|2|3| |k| | | +-+-+-+-+-------+-+-------------+ - - - - - - - - - - - - - - - + | extended payload length continued, if payload len == 127 | +...
... - - - - - - - - - - - - - - - +-------------------------------+ | |masking-key, if mask set to 1 | +-------------------------------+-------------------------------+ | masking-key (continued) | payload data | +-------------------------------- - - - - - - - - - - - - - - - + : payload data continued ...
...And 12 more matches

<audio>: The Embed Audio element - HTML: Hypertext Markup Language
autoplay a boolean attribute: if specified, the audio will automatically begin playback as soon as it can do so, without waiting for the entire audio file to finish downloading.
...otherwise, setting currenttime sets the current playback position to the given time and seeks the media to that position if the media is currently loaded.
... preload this enumerated attribute is intended to provide a hint to the browser about what the author thinks will lead to the best user experience.
...And 12 more matches

Promises - Archive of obsolete content
let resp = yield new promise((resolve, reject) => { let xhr = new xmlhttprequest; xhr.onload = resolve; xhr.onerror = reject; xhr.open("get", dataurl); xhr.responsetype = "json"; xhr.send(); }); let data = resp.target.response; // use the response to construct form data object for the // second request.
... resp = yield new promise((resolve, reject) => { let xhr = new xmlhttprequest; xhr.onload = resolve; xhr.onerror = reject; xhr.open("post", updateurl); xhr.send(form); }); // use the response of the second request.
... notifyuser(xhr.responsetext); }); downloading remote files nearly all previous methods of downloading remote files have been superseded by the much simpler downloads.jsm module.
...And 11 more matches

Using Remote XUL - Archive of obsolete content
this also means you can't load xul using file:// urls unless you set the preference dom.allow_xul_xbl_for_file to true.
... xul is often used by desktop applications like mozilla but can also be loaded from a web server and rendered inside the content pane of a compatible browser.
... xul loaded and rendered in this way is called remote xul and can be used for basic functions like web site navigation as well as to build sophisticated web-based applications.
...And 11 more matches

Responsive images - Learn web development
doing so can waste bandwidth; in particular, mobile users don't want to waste bandwidth by downloading a large image intended for desktop, when a small image would do for their device.
... load the image referenced in the srcset list that has the same size as the slot or, if there isn't one, the first image that is bigger than the chosen slot size.
...at this point, if a supporting browser with a viewport width of 480px loads the page, the (max-width: 600px) media condition will be true, and so the browser chooses the 480px slot.
...And 11 more matches

Getting started with Svelte - Learn web development
less code means less kb to download, parse, execute, and keep hanging around in memory.
... also see the following for more information: "what is npm" on nodejs.org "introducing npx" on the npm blog "the easiest way to get started with svelte" on the svelte blog creating your first svelte app the easiest way to create a starter app template is to just download the starter template application.
... you can do that by visiting sveltejs/template on github or you can avoid having to download and unzip it and just use degit.
...And 11 more matches

Limitations of chrome scripts
the fix is generally some variant of "do that in a frame script loaded into the content process".
... to make the shim unnecessary: factor the code that needs to access content into a separate script, load that script into the content process as a frame script, and communicate between the chrome script and the frame script using the message-passing apis.
... nsicontentpolicy without the shim in multiprocess firefox, if you register the nsicontentpolicy in the chrome process then it will never see any attempts to load web content, because they happen in the content process.
...And 11 more matches

InstallListener
method overview void onnewinstall(in addoninstall install) void ondownloadstarted(in addoninstall install) void ondownloadprogress(in addoninstall install) void ondownloadended(in addoninstall install) void ondownloadcancelled(in addoninstall install) void ondownloadfailed(in addoninstall install) void oninstallstarted(in addoninstall install) void oninstallended(in addoninstall install, in addon addon) void oninstallcancelled(in addoninstall install) void oninstallfailed(in addoninstall install) vo...
... void onnewinstall( in addoninstall install ) parameters install the addoninstall representing the install ondownloadstarted() called when downloading begins for an add-on install.
... only called for add-ons that need to be downloaded.
...And 11 more matches

NSS PKCS11 Functions
secmod_loadusermodule secmod_unloadusermodule secmod_openuserdb secmod_closeuserdb pk11_findcertfromnickname pk11_findkeybyanycert pk11_getslotname pk11_gettokenname pk11_ishw pk11_ispresent pk11_isreadonly pk11_setpasswordfunc secmod_loadusermodule load a new pkcs #11 module based on a modulespec.
... syntax #include "secmod.h" extern secmodmodule *secmod_loadusermodule(char *modulespec, secmodmodule *parent, prbool recurse); parameters this function has the following parameters: modulespec is a pkcs #11 modulespec.
...this is only applicable if the loaded module is actually a moduledb rather than a pkcs #11 module (see pkcs11_module_specs).
...And 11 more matches

PKCS11 Implement
general-purpose functions c_initialize the nss calls c_initialize on startup or when it loads a new module.
... c_finalize the nss calls c_finalize on shutdown and whenever it unloads a module.
... c_getfunctionlist the nss calls c_getfunctionlist on startup or when it loads a new module.
...And 11 more matches

nsIModule
inherits from: nsisupports last changed in gecko 0.9.9 method overview boolean canunload(in nsicomponentmanager acompmgr); void getclassobject(in nsicomponentmanager acompmgr, in nscidref aclass, in nsiidref aiid, [retval, iid_is(aiid)] out nsqiresult aresult); void registerself(in nsicomponentmanager acompmgr, in nsifile alocation, in string aloaderstr, in string atype); void unregisterself(in nsicomponentmanager acompmgr, in nsifile alocation, in string aloaderstr); methods canunload() this method may be queried to determine whether or not the component module ...
...can be unloaded by xpcom.
... boolean canunload( in nsicomponentmanager acompmgr ); parameters acompmgr the global component manager.
...And 11 more matches

Navigator.sendBeacon() - Web APIs
description this method is for analytics and diagnostics that send data to a server before the document is unloaded, where sending the data any sooner may miss some possible data collection.
... for example, which link the user clicked before navigating away and unloading the page.
... ensuring that data has been sent during the unloading of a document has traditionally been difficult, because user agents typically ignore asynchronous xmlhttprequests made in an unload handler.
...And 11 more matches

Using Service Workers - Web APIs
the best web app in the world will provide a terrible user experience if you can’t download it.
...so documents will have to be reloaded to actually be controlled.
... now for a real example — what if we wanted to load images dynamically, but we wanted to make sure the images were loaded before we tried to display them?
...And 11 more matches

Large-Allocation - HTTP
the non-standard large-allocation response header tells the browser that the page being loaded is going to want to perform a large allocation.
...the large-allocation tells the browser that the web content in the to-be-loaded page is going to want to perform a large contiguous memory allocation and the browser can react to this header by starting a dedicated process for the to-be-loaded document, for example.
... this page was loaded in a new process due to a large-allocation header.
...And 11 more matches

Mapping the width and height attributes of media container elements to their aspect-ratio - Web media technologies
this change means that the aspect ratio of the image is calculated by the browser early on and can then be used to correct the size needed to display the image before it has loaded, if css has been applied that causes problems with its display size.
... jank problems when loading images in the olden days of web development, it was always seen as a good practice to add width and height attributes to your html <img> elements, so that when browsers first loaded the page, they could put a correctly-sized placeholder box in the layout for each image to appear in when it finally loads.
... without the width and height attributes, no placeholder space would be created, and when the image finally loaded you would get a noticeable jank in the page layout.
...And 11 more matches

Performance fundamentals - Web Performance
common-case animations are "offloaded" to the system compositor, which can render them in a performant, power-efficient fashion.
...gecko is optimized to load a wide variety of content efficiently: the entire web!
... startup performance application startup is punctuated by three user-perceived events, generally speaking: the first is the application first paint — the point at which sufficient application resources have been loaded to paint an initial frame the second is when the application becomes interactive — for example, users are able to tap a button and the application responds the final event is full load — for example when all the user's albums have been listed in a music player the key to fast startup is to keep two things in mind: upp is all that matters, and there's a "critical path" to each user-perce...
...And 11 more matches

Structural overview of progressive web apps - Progressive web apps (PWAs)
server-side rendering (ssr) means a website is rendered on the server, so it offers quicker first load, but navigating between pages requires downloading new html content.
... it works great across browsers, but it suffers in terms of time navigating between pages and therefore general perceived performance — loading a page requires a new round trip to the server.
... client-side rendering (csr) allows the website to be updated in the browser almost instantly when navigating to different pages, but requires more of an initial download hit and extra rendering on the client at the beginning.
...And 11 more matches

Communicating With Other Scripts - Archive of obsolete content
this section of the guide explains how content scripts can communicate with: your main.js file, or any other modules in your add-on other content scripts loaded by your add-on page scripts (that is, scripts embedded in the web page or included using <script> tags) main.js your content scripts can communicate with your add-on's "main.js" (or any other modules you're written for your add-on) by sending it messages, using either the port.emit() api or the postmessage() api.
... content scripts content scripts loaded into the same document at the same time using the same method can interact with each other directly as well as with the web content itself.
... however, content scripts which have been loaded into different documents cannot interact directly with each other.
...And 10 more matches

StringView - Archive of obsolete content
math.min(math.max(nlength, 0), ninptlen - ncharstart) : ninptlen; nendidx = ncharend = noutptlen + ncharstart; if (vinput.encoding === "utf-8") { fgetinptchrsize = stringview.getutf8charlength; fgetinptchrcode = stringview.loadutf8charcode; } else if (vinput.encoding === "utf-16") { fgetinptchrsize = stringview.getutf16charlength; fgetinptchrcode = stringview.loadutf16charcode; } else { ntranscrtype &= 1; } } if (noutptlen === 0 || ntranscrtype < 4 && vsource.encoding === this.encoding && ncharstart === 0 && noutptlen === ninptlen) { /* the encoding is the same,...
...awhole.subarray(nstartidx, nendidx) : awhole; } this.buffer = awhole.buffer; this.bufferview = awhole; this.rawdata = araw; object.freeze(this); } /* constructor's methods */ stringview.loadutf8charcode = function (achars, nidx) { /* the iso 10646 view of utf-8 considers valid codepoints encoded by 1-6 bytes, * while the unicode view of utf-8 in 2003 has limited them to 1-4 bytes in order to * match utf-16's codepoints.
...5 : 6; }; stringview.loadutf16charcode = function (achars, nidx) { /* utf-16 to domstring decoding algorithm */ var nfrstchr = achars[nidx]; return nfrstchr > 0xd7bf /* 55231 */ && nidx + 1 < achars.length ?
...And 10 more matches

Using the Editor from XUL - Archive of obsolete content
overview the editor in xul lives on top of a xul <iframe> element; it observes document loading in this <iframe>, and, when document loading is complete, it instantiates an editor on the loaded document.
...editor.xul is loaded.
... in editor.xul, the <window> tag has an onload handler: onload="editoronload()".
...And 10 more matches

Building a Theme - Archive of obsolete content
it contains several folders, modules, jssubloader and others.
... if you get a message that the install.rdf is malformed, it is helpful to load it into firefox using the file->open file command and it will report xml errors to you.
...css, xul, and other files are part of "chrome packages" - bundles of user interface components which are loaded via chrome:// uris.
...And 10 more matches

Sending forms through JavaScript - Learn web development
a form is not always a form with progressive web apps, single page apps, and framework based apps, it's common to use html forms to send data without loading a new document when response data is received.
... gaining control of the global interface standard html form submission, as described in the previous article, loads the url where the data was sent, which means the browser window navigates with a full page load.
... avoiding a full page load can provide a smoother experience by avoiding network lag, and possible visual issues like flickering.
...And 10 more matches

Message manager overview
at the top level, there are two different sorts of message managers: frame message managers: these enable chrome process code to load a script into a browser frame (essentially, a single browser tab) in the content process.
...from firefox 38 onwards, they also enable code running in the parent process to load process scripts into the child process.
... frame message managers in multiprocess firefox, when chrome code needs to interact with web content, it needs to: factor the code that needs direct access to content into separate scripts, which are called "frame scripts" use a frame message manager to load these frame scripts into the content process use the frame message manager api to communicate with the frame script some older articles on multiprocess firefox and the message manager might refer to "content scripts" instead of "frame scripts", but this usage is deprecated because the add-on sdk uses "content script" to refer to a similar but different kind of script.
...And 10 more matches

HTML parser threading
the loop first flushes speculative loads (creation discussed later).
...it contains all the information that is necessary to load back into the tree builder to restore it into a behaviorally equivalent state.
...if the parser is told to block, the script loader will unblock the parser before the external script executes.
...And 10 more matches

Scripting Java
if java.myclass is accessed, rhino attempts to load a class named java.myclass.
... if that load fails, it assumes that java.myclass is a package name, and no error is reported: js> java.myclass [javapackage java.myclass] only if you attempt to use this object as a class will an error be reported.
...if we just view the method object by itself we can see the various overloaded forms of the method: js> f.listfiles function listfiles() {/* java.io.file[] listfiles() java.io.file[] listfiles(java.io.filenamefilter) java.io.file[] listfiles(java.io.filefilter) */} this output shows that the file class defines three overloaded methods listfiles: one that takes no arguments, another with a filenamefilter argument, and a third with a filefilter argument.
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Bundling multiple binary components
possible solutions this article covers two possible ways to make binary components support multiple version of gecko: dynamic method loading stub loader dynamic method loading the idea with this approach is to figure out all the methods imported from gecko and dynamically load the methods.
...this means using something like loadlibrary / getprocaddress / freelibrary on windows.
... this approach uses only one binary for each platform (win/mac/linux) but creates complexity in the binaries - loading the methods and creating the wrappers.
...And 10 more matches

Component Internals
component loaders components can be written in many languages.
...but if there is a component loader for javascript installed, then you can also write a javascript component.
... to register, unregister, load and manage various component types, xpcom abstracts the interface between the xpcom component and xpcom with the component loader.
...And 10 more matches

nsICachingChannel
depending on the value of nsirequest.loadflags(), the cache entry may be validated, overwritten, or simply read.
... constants constant value description load_no_network_io 1 << 26 this load flag inhibits fetching from the net.
...combining this flag with load_bypass_local_cache will cause all loads to fail.
...And 10 more matches

nsIChannel
if this value is null, the channel implementation may use the notification callbacks from its load group.
... the channel may also query the notification callbacks from its load group if its notification callbacks do not supply the requested interface.
... this is also used as the ri of the document resulting from the channel, unless the channel has the load_replace flag set.
...And 10 more matches

nsIRequest
method overview void cancel(in nsresult astatus); boolean ispending(); void resume(); void suspend(); attributes attribute type description loadflags nsloadflags the load flags of this request.
... when added to a load group, this request's load flags are merged with the load flags of the load group.
... loadgroup nsiloadgroup the load group of this request.
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Troubleshooting XPCOM components registration
there are several common reasons that registration can fail: a component that is a binary (shared library) fails to load a javascript component has parsing errors the shared library loaded correctly, but registration was not successful did registration succeed?
... load failure of binary components on the mozilla trunk (firefox 3, xulrunner 1.9), components that fail to load will print an error to the error console.
...set nspr_log_modules=nsnativemoduleloader:5 set nspr_log_file=c:\path\to\logfile "c:\program files\mozilla firefox\firefox.exe" examining this log for warning and errors may provide valuable clues why the component failed to load.
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Using IndexedDB - Web APIs
version changes while a web app is open in another tab when your web app changes in such a way that a version change is required for your database, you need to consider what happens if the user has the old version of your app open in one tab and then loads the new version of your app in another.
... when you call open() with a greater version than the actual version of the database, all other open databases must explicitly acknowledge the request before you can start making changes to the database (an onblocked event is fired until they are closed or reloaded).
... here's how it works: var openreq = mozindexeddb.open("mytestdatabase", 2); openreq.onblocked = function(event) { // if some other tab is loaded with the database, then it needs to be closed // before we can proceed.
...And 10 more matches

Modifying Web Pages Based on URL - Archive of obsolete content
to modify any pages that match a particular pattern (for example, "http://example.org/") as they are loaded, use page-mod module.
... a simple code snippet where content script is supplied as contentscript option and url pattern is given as include option is as follows: // import the page-mod api var pagemod = require("sdk/page-mod"); // create a page-mod // it will run a script whenever a ".org" url is loaded // the script replaces the page contents with a message pagemod.pagemod({ include: "*.org", contentscript: 'document.body.innerhtml = ' + ' "<h1>page matches ruleset</h1>";' }); do as follows: create a new directory and navigate to it.
... for example, if we save the script above under the add-on's data directory in a file called my-script.js: // import the page-mod api var pagemod = require("sdk/page-mod"); // import the self api var self = require("sdk/self"); // create a page-mod // it will run a script whenever a ".org" url is loaded // the script replaces the page contents with a message pagemod.pagemod({ include: "*.org", contentscriptfile: self.data.url("my-script.js") }); or from firefox 34 onwards: // import the page-mod api var pagemod = require("sdk/page-mod"); // create a page-mod // it will run a script whenever a ".org" url is loaded // the script replaces the page contents with a message pagemod.pagemod({ ...
...And 9 more matches

Using the Stylesheet Service - Archive of obsolete content
the stylesheets registered with this api apply to all documents; firefox 18 extended nsidomwindowutils with loadadditionalstylesheet() and removeadditionalstylesheet() to manage stylesheets for a specific document (bug 737003).
...replace it with the url of the css file you want to load.
... adding a stylesheet to use the stylesheet service, you get a reference to the service, create a uri and pass the uri to the stylesheet service's loadandregistersheet method.
...And 9 more matches

Modularization techniques - Archive of obsolete content
a pure virtual interface is simply a class where every method is defined as pure virtual, that is: virtual int foo(int bar) = 0; pure virtual interfaces provide an easy mechanism for passing function tables between modules that may reside in separate, possibly dynamically loaded, libraries.
... const nsiid &aiid, nsisupports *adelegate, void **aresult); // manually registry a factory for a class static nsresult registerfactory(const nscid &aclass, nsifactory *afactory, prbool areplace); // manually registry a dynamically loaded factory for a class static nsresult registerfactory(const nscid &aclass, const char *alibrary, prbool areplace, prbool apersist); // manually unregister a factory for a class static nsresult unregisterfactory(const nscid &aclass, nsifactory *afactory); ...
... // manually unregister a dynamically loaded factory for a class static nsresult unregisterfactory(const nscid &aclass, const char *alibrary); // unload dynamically loaded factories that are not in use static nsresult freelibraries(); }; there are several ways a factory can make its way into the repository.
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Drawing graphics - Learn web development
if you save and load your example in a browser now, you'll see nothing, which is fine, but you'll also see scrollbars — this is a problem for us, which happens because the <body> element has a margin that, added to our full-window-size canvas, results in a document that's wider than the window.
...at this point, the browser starts loading the image.
... we could now try to embed the image using drawimage(), but we need to make sure the image file has been loaded first, otherwise the code will fail.
...And 9 more matches

Multimedia: video - Learn web development
previous overview: performance next as we learned in the previous section, media, namely images and video, account for over 70% of the bytes downloaded for the average website.
... objective: to learn about the various video formats, their impact on performance, and how to reduce video impact on overall page load time while serving the smallest video file size based on each browsers file type support.
... optimizing video delivery it's best to compress all video, optimize <source> order, set autoplay, remove audio from muted video, optimize video preload, and consider streaming the video.
...And 9 more matches

Setting up your own test automation environment - Learn web development
to install selenium-webdriver, run the following command, making sure you are inside your project folder: npm install selenium-webdriver note: it is still a good idea to follow these steps even if you previously installed selenium-webdriver and downloaded the browser drivers.
... next, you need to download the relevant drivers to allow webdriver to control the browsers you want to test.
... download the latest geckodriver (for firefox) and chromedriver drivers.
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Obsolete Build Caveats and Tips
to get this code, do the following: # pull the mozilla source to the folder 20src/ - may take a while # as hundreds of megabytes of history is downloaded to .hg hg clone https://hg.mozilla.org/releases/mozilla-2.0/ 20src cd 20src mozilla-1.9.2 (firefox 3.6) code for the firefox 3.6 (gecko 1.9.2) release lives in releases/mozilla-1.9.2.
... to get this code, do the following: # pull the mozilla source to the folder 192src/ - may take a while # as hundreds of megabytes of history is downloaded to .hg hg clone https://hg.mozilla.org/releases/mozilla-1.9.2/ 192src cd 192src mozilla-1.9.1 (firefox 3.5) code for the firefox 3.5 (gecko 1.9.1) release lives in releases/mozilla-1.9.1.
... to get this code, do the following: # pull the mozilla source to the folder 191src/ - may take a while # as hundreds of megabytes of history is downloaded to .hg hg clone https://hg.mozilla.org/releases/mozilla-1.9.1/ 191src cd 191src note: starting with gecko 5.0, you can actually build firefox without a .mozconfig file.
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How to get a stacktrace with WinDbg
download it from install debugging tools for windows.
...(the keystroke for a pipe character on us keyboards is shift+\) submit the log file on a bug or via the support site, even if nothing seems to happen during the debug process start debugging now that firefox is opened in the debugger, you need to configure your windbg to download symbols from the mozilla symbol server.
... to load the symbols, enter the three commands below, pressing enter after each one.
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Application Translation with Mercurial
this example uses winmerge: download and install it.
... getting the current texts in english and your locale obtaining the english texts with the source code get the source code by downloading the following file: firefox desktop or firefox for android: download the mozilla-<branch>.hg file (e.g.
... mozilla-aurora.hg) from https://ftp.mozilla.org/pub/mozilla.org/firefox/bundles/ the file is not small, but after initially downloading it, you only need to download the latest changes in the future.
...And 9 more matches

PKCS11 FAQ
other certificates on the token are also loaded (to allow building certificate chains), but it's not necessary to include the full chain, as long as the full chain is available in the regular certificate database.
...this value is set when the key is generated, so that nss will be able to find the key when the certificate for that key is loaded.
... pkcs #11 certificates that have private keys associated with them are are loaded into the temporary database (in memory) and marked as user certificates.
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Creating the Component Code
use the calculator (after learning long division) you have to write a fair amount of code to create a component library that gets loaded into xpcom.
...this is the object that contains the business logic, that implements functionality such as starting a network download, implementing interfaces that listen to the download progress, or providing a new content type handler.
... coding for the registration process when xpcom discovers your component for the first time (via xpinstall or regxpcom, both of which are discussed in component installation overview), the first thing it tries to do is load your library and find the symbol nsgetmodule.
...And 9 more matches

mozIAsyncFavicons
method overview void getfaviconurlforpage(in nsiuri apageuri, in nsifavicondatacallback acallback); void getfavicondataforpage(in nsiuri apageuri, in nsifavicondatacallback acallback); void setandfetchfaviconforpage(in nsiuri apageuri, in nsiuri afaviconuri, in boolean aforcereload, in unsigned long afaviconloadtype, [optional] in nsifavicondatacallback acallback); void replacefavicondata(in nsiuri afaviconuri, [const,array,size_is(adatalen)] in octet adata, in unsigned long adatalen, in autf8string amimetype, [optional] in prtime aexpiration); void replacefavicondatafromdataurl(in nsiuri afaviconuri, in astring adataurl, [optional] in prtim...
... setandfetchfaviconforpage() declares that a given page uses a favicon with the given uri and attempts to fetch and save the icon data by loading the favicon uri through a asynchronous network request.
... if the icon data already exists, we will not try to reload the icon unless aforcereload is true.
...And 9 more matches

nsIExternalProtocolService
uriloader/exthandler/nsiexternalprotocolservice.idlscriptable the external protocol service is used for finding and launching web handlers (a la registerprotocolhandler in the html5 draft) or platform-specific applications for handling particular protocols.
...and you can ask it to load the url using the default handler.
... method overview boolean externalprotocolhandlerexists(in string aprotocolscheme); astring getapplicationdescription(in autf8string ascheme); nsihandlerinfo getprotocolhandlerinfo(in acstring aprotocolscheme); nsihandlerinfo getprotocolhandlerinfofromos(in acstring aprotocolscheme, out boolean afound); boolean isexposedprotocol(in string aprotocolscheme); void loaduri(in nsiuri auri, [optional] in nsiinterfacerequestor awindowcontext); void loadurl(in nsiuri aurl); void setprotocolhandlerdefaults(in nsihandlerinfo ahandlerinfo, in boolean aoshandlerexists); methods externalprotocolhandlerexists() check whether a handler for a specific protocol exists.
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nsIProtocolHandler
note: starting with firefox 3, one of uri_loadable_by_anyone, uri_dangerous_to_load, uri_is_ui_resource, or uri_is_local_file must be set on every protocol handler.
... current versions of firefox assume that the uri has uri_loadable_by_anyone set, but this will not work starting with the mozilla 2 platform.
... uri_inherits_security_context 1<<4 uris for this protocol have no inherent security context, so documents loaded using this protocol should inherit the security context of the document that loads them.
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MediaDevices.getUserMedia() - Web APIs
eam = await navigator.mediadevices.getusermedia(constraints); /* use the stream */ } catch(err) { /* handle the error */ } } similarly, using the raw promises directly, the code looks like this: navigator.mediadevices.getusermedia(constraints) .then(function(stream) { /* use the stream */ }) .catch(function(err) { /* handle the error */ }); note: if the current document isn't loaded securely, navigator.mediadevices will be undefined, and you cannot use getusermedia().
...this will happen if the browsing context is insecure (that is, the page was loaded using http rather than https).
...a secure context is, in short, a page loaded using https or the file:/// url scheme, or a page loaded from localhost.
...And 9 more matches

Recording a media element - Web APIs
the "download" button will download the received data (although it's in a raw, unwrapped form that isn't very useful).
... <div class="right"> <div id="stopbutton" class="button"> stop </div> <h2>recording</h2> <video id="recording" width="160" height="120" controls></video> <a id="downloadbutton" class="button"> download </a> </div> on the right we see a stop button and the <video> element which will be used to play back the recorded video.
... below the playback element is a button for downloading the recorded video.
...And 9 more matches

Request.cache - Web APIs
otherwise the resource will be downloaded from the server and the cache will be updated.
... if there is no match, the browser will make a normal request, and will update the cache with the downloaded resource.
... no-store — the browser fetches the resource from the remote server without first looking in the cache, and will not update the cache with the downloaded resource.
...And 9 more matches

Web Video Text Tracks Format (WebVTT) - Web APIs
it is important to not use "extra" blank lines within a cue, for example between the timings line and the cue payload.
... webvtt cues a cue is a single subtitle block that has a single start time, end time, and textual payload.
... the cue payload text.
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Implementing a Microsoft Active Accessibility (MSAA) Server - Accessibility
to really learn about msaa, you need to download the entire msaa sdk.
... without downloading the sdk, you won't get the extremely useful tools, which help a great deal in the learning process.
...this can lead to crashes where it releases something and the wrong time, when some of your dll's are unloaded but not others, and a destructor is called in an unloaded dll.
...And 9 more matches

Content Security Policy (CSP) - HTTP
a csp compatible browser will then only execute scripts loaded in source files received from those allowlisted domains, ignoring all other script (including inline scripts and event-handling html attributes).
... mitigating packet sniffing attacks in addition to restricting the domains from which content can be loaded, the server can specify which protocols are allowed to be used; for example (and ideally, from a security standpoint), a server can specify that all content must be loaded using https.
... using csp configuring content security policy involves adding the content-security-policy http header to a web page and giving it values to control what resources the user agent is allowed to load for that page.
...And 9 more matches

Strict-Transport-Security - HTTP
header type response header forbidden header name no syntax strict-transport-security: max-age=<expire-time> strict-transport-security: max-age=<expire-time>; includesubdomains strict-transport-security: max-age=<expire-time>; preload directives max-age=<expire-time> the time, in seconds, that the browser should remember that a site is only to be accessed using https.
... preload optional see preloading strict transport security for details.
... the http strict transport security header informs the browser that it should never load a site using http and should automatically convert all attempts to access the site using http to https requests instead.
...And 9 more matches

Link prefetching FAQ - HTTP
link prefetching is a browser mechanism, which utilizes browser idle time to download or prefetch documents that the user might visit in the near future.
... a web page provides a set of prefetching hints to the browser, and after the browser is finished loading the page, it begins silently prefetching specified documents and stores them in its cache.
...we attach a listener to the toplevel nsiwebprogress object ("@mozilla.org/docloaderservice;1").
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Progressive web app structure - Progressive web apps (PWAs)
server-side rendering (ssr) means a website is rendered on the server, so it offers quicker first load, but navigating between pages requires downloading new html content.
... it works great across browsers, but it suffers in terms of time navigating between pages and therefore general perceived performance — loading a page requires a new round trip to the server.
... client-side rendering (csr) allows the website to be updated in the browser almost instantly when navigating to different pages, but requires more of an initial download hit and extra rendering on the client at the beginning.
...And 9 more matches

frame/hidden-frame - Archive of obsolete content
this is useful in the construction of apis that load web content not intended to be directly seen or accessed by users, like page-worker.
... it is also useful in the construction of apis that load web content for intermittent display, such as panel.
...add registers a hidden frame, preparing it to load content.
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Updating addons broken by private browsing changes - Archive of obsolete content
if your code refers to any of the following interfaces: ff 15: nsidomstoragemanager ff 16: nsitransferable ff 18: imgicache moziasyncfavicons nsifaviconservice nsiwebbrowserpersist ff 19: nsicontentprefservice nsidownloadmanager nsidownload nsihttpauthmanager nsistricttransportsecurityservice ff 20: nsiprivatebrowsingservice nsirecentbadcertservice furthermore, if your code uses any of these common chrome apis: ff 19: saveurl saveinternal openlinkin ff 20: openbrowserwindow gprivatebrowsingui finally, if your code watches for any of these observer notifications: private-browsing private-browsing-cancel-vo...
... moziasyncfavicons/nsifaviconservice: setandfetchfaviconforpage/setandloadfaviconforpage now take a required privacy status argument, either nsifaviconservice.favicon_load_private or nsifaviconservice.favicon_load_non_private.
... nsicontentprefservice: getpref, setpref, haspref, hascachedpref, removepref, removegroupedprefs, removeprefsbyname, getprefs, and getprefsbyname all take a required nsiloadcontext argument to indicate the privacy status of the pref in question.
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JXON - Archive of obsolete content
vvalue : new vvalue.constructor(vvalue); } var atmpels = []; // loaded element nodes cache function getjxontree (oxmlparent) { var sprop, vcontent, vresult, nlength = 0, nlevelstart = atmpels.length, nchildren = oxmlparent.haschildnodes() ?
...|*| http://www.gnu.org/licenses/gpl-3.0-standalone.html |*| \*/ function createxml (oobjtree) { function loadobjtree (oparentel, oparentobj) { var vvalue, ochild; if (oparentobj.constructor === string || oparentobj.constructor === number || oparentobj.constructor === boolean) { oparentel.appendchild(onewdoc.createtextnode(oparentobj.tostring())); /* verbosity level is 0 or 1 */ if (oparentobj === oparentobj.valueof()) { return; } } else if (oparentobj.constructor === date) { ...
...tributes") { /* verbosity level is 3 */ for (var sattrib in vvalue) { oparentel.setattribute(sattrib, vvalue[sattrib]); } } else if (sname.charat(0) === "@") { oparentel.setattribute(sname.slice(1), vvalue); } else if (vvalue.constructor === array) { for (var nitem = 0; nitem < vvalue.length; nitem++) { ochild = onewdoc.createelement(sname); loadobjtree(ochild, vvalue[nitem]); oparentel.appendchild(ochild); } } else { ochild = onewdoc.createelement(sname); if (vvalue instanceof object) { loadobjtree(ochild, vvalue); } else if (vvalue !== null && vvalue !== true) { ochild.appendchild(onewdoc.createtextnode(vvalue.tostring())); } oparentel.appendchild(ochild...
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New Security Model for Web Services - Archive of obsolete content
the problem external untrusted scripts loaded behind a firewall are executed in a sandbox.
... client-controlled solutions several client-controlled solutions have been designed to prevent sandboxed applications loaded behind a firewall from compromising other resources protected behind the firewall.
... same source restriction by restricting sandboxed scripts to access only resources in the domain from which they were loaded, any script loaded from one domain into another is prevented from accessing resources in the domain into which it has been loaded.
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Anonymous Content - Archive of obsolete content
for example, the html file upload control appears in most browsers as a composite widget consisting of a text field and a button.
... a sample xbl binding for the file widget might look as follows: <binding id="fileupload"> <content> <html:input type="text"/> <html:input type="button"/> </content> </binding> because this content is not visible to its parent element, it is said to be anonymous content.
... for example, on the html file upload control, the anonymous textfield can be set up to automatically inherit the value attribute from the bound element.
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XPJS Components Proposal - Archive of obsolete content
just as with native component modules each of these .js files will be expected to have the functions: nsregisterself nsgetfactory nsunregisterself (optional) nscanunload (optional) each .js file might implement one or more components.
...the xpjsmanager is in charge of loading these .js files, helping them register themselves, and acting as an intermediary between the xpcom component manager and the js code.
... a 'load' or 'import' function will also be provided to let the js code import other .js files where libraries of code might be stored.
...And 8 more matches

XUL Structure - Archive of obsolete content
when you type the url of an html page into the browser's address field, the browser locates the web site and downloads the content.
...since xul and html are handled in the same way, you can load both from either your local file system, from a web page, or from an extension or standalone xulrunner application.
...when the user downloads the zipped file, the packaged files will be installed onto the user's machine.
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Using the Right Markup to Invoke Plugins - Archive of obsolete content
here's 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 uniqu...
...gain 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.
...however, there are a few caveats that developers ought to bear in mind when using the object element with mozilla-based browsers such as netscape 7 and in ie: caveats if you use one single object element for both browsers (as in the above example), it is not possible to provide a cross-browserobtainment mechanism for streamlined download.
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How do you make sure your website works properly? - Learn web development
prerequisites: you need to know how to upload files to a web server.
...you might be surprised at how many problems come up: images don't show up, pages don't load or load slowly, and so on.
... open firefox's network tool (tools ➤ web developer ➤ network) and reload the page: there's the problem, that "404" at the bottom.
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Introduction to web APIs - Learn web development
image source: overloaded plug socket by the clear communication people, on flickr.
... common browser apis in particular, the most common categories of browser apis you'll use (and which we'll cover in this module in greater detail) are: apis for manipulating documents loaded into the browser.
...this seemingly small detail has had a huge impact on the performance and behaviour of sites — if you just need to update a stock listing or list of available new stories, doing it instantly without having to reload the whole entire page from the server can make the site or app feel much more responsive and "snappy".
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Browser API
they are necessary to be able to implement back, forward, stop, and reload buttons.
... htmliframeelement.reload() allows reloading of the <iframe> element content.
... htmliframeelement.stop() allows stopping of the <iframe>'s content loading.
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Shell global objects
load(['foo.js' ...]) load files named by string arguments.
... loadrelativetoscript(['foo.js' ...]) load files named by string arguments.
... 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.
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imgIDecoderObserver
it lets you monitor the progress of loading an image.
... 1.0 66 introduced gecko 12.0 inherits from: imgicontainerobserver last changed in gecko 1.7 we make the distinction here between "load" and "decode" notifications.
... load notifications are fired as the image is loaded from the network or filesystem.
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nsISHistoryListener
inherits from: nsisupports last changed in gecko 1.7 a session history listener is notified when pages are added to, removed from, and loaded from session history.
...method overview boolean onhistorygoback(in nsiuri abackuri); boolean onhistorygoforward(in nsiuri aforwarduri); boolean onhistorygotoindex(in long aindex, in nsiuri agotouri); void onhistorynewentry(in nsiuri anewuri); boolean onhistorypurge(in long anumentries); boolean onhistoryreload(in nsiuri areloaduri, in unsigned long areloadflags); methods onhistorygoback() called when navigating to a previous session history entry, for example due to an nsiwebnavigation.goback() call.
...boolean onhistorygotoindex( in long aindex, in nsiuri agotouri ); parameters aindex the index in session history of the entry to be loaded.
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Using the Mozilla symbol server
this allows debugging of those builds without forcing all users to download large debugging files.
...to use only the mozilla symbol server, add the following entry to your symbol path (note: you can replace c:\symcache\ with any writable directory on your computer, if you'd prefer a different location for downloaded symbols): srv*c:\symcache\*https://symbols.mozilla.org/ set this string as _nt_symbol_path in the environment, using the windbg menus, or by typing the .sympath command.
... if you would like to get symbols from microsoft's symbol server as well, you should list that first (note: you can replace c:\symcache\ with any writable directory on your computer, if you'd prefer a different location for downloaded symbols): srv*c:\symcache\*https://msdl.microsoft.com/download/symbols;srv*c:\symcache\*https://symbols.mozilla.org/ downloading symbols using symchk.exe you can also download the symbols using symchk.exe, part of microsoft's debugging tools for windows.
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about:debugging (before Firefox 68) - Firefox Developer Tools
this page enables you to do two things: load an add-on temporarily from disk connect the add-on debugger to any restartless add-ons connecting the add-on debugger the add-ons page in about:debugging lists all restartless add-ons that are currently installed (note that this list may include add-ons that came preinstalled with your firefox).
... loading a temporary add-on with the "load temporary add-on" button you can load any sort of restartless add-on temporarily, from a directory on disk.
... the big advantages of this method, compared with installing an add-on from an xpi, are: you don't have to rebuild an xpi and reinstall when you change the add-on's code you can load an add-on without signing it and without needing to disable signing.
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Beacon API - Web APIs
requests are guaranteed to be initiated before a page is unloaded and they are run to completion, without requiring a blocking request (for example xmlhttprequest).
... the beacon interface addresses the needs of analytics and diagnostics code that typically attempts to send data to a web server before unloading the document.
...however, ensuring that the data is sent during the unloading of a document is something that has traditionally been difficult for developers.
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FileReader - Web APIs
this is one of the following: empty 0 no data has been loaded yet.
... loading 1 data is currently being loaded.
... filereader.onload a handler for the load event.
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Border-image generator - CSS: Cascading Style Sheets
mg class="image" src="https://udn.realityripple.com/samples/7b/dd37c1d691.png" data-stateid="border4"/> <img class="image" src="https://udn.realityripple.com/samples/a9/b9fff72dab.png" data-stateid="border5"/> <img class="image" src="https://udn.realityripple.com/samples/fb/c0b285d3da.svg" data-stateid="border6"/> </div> </div> <div id="load-actions" class="group section"> <div id="toggle-gallery" data-action="hide"> </div> <div id="load-image" class="button"> upload image </div> <input id="remote-url" type="text" placeholder="load an image from url"/> <div id="load-remote" class="button"> </div> </div> <div id="general-controls" class="group section"> <div ...
...y .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-gallery:hover { cursor: pointer; } ...
...mportant; } #toggle-gallery[data-action='hide'] { background-image: url('https://mdn.mozillademos.org/files/6005/arrow-up-white.png'); } .button { width: 100px; height: 25px; margin: 10px; color: #fff; text-align: center; font-size: 12px; line-height: 25px; background-color: #379b4a; border-radius: 2px; float: left; } .button:hover { cursor: pointer; background-color: #3380c4; } #load-image { float: left; } #load-remote { width: 30px; background-image: url('https://mdn.mozillademos.org/files/6003/arrow-right-white.png'); background-repeat: no-repeat; background-position: center center; } #remote-url { width: 200px; height: 23px; margin: 10px; padding: 0 5px; border: 1px solid #379b4a; border-radius: 2px; float: left; transition: width 0.5s; } #remote-url:focus...
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HTML attribute reference - HTML: Hypertext Markup Language
autofocus <button>, <input>, <keygen>, <select>, <textarea> the element should be automatically focused after the page loaded.
... checked <command>, <input> indicates whether the element should be checked on page load.
... code <applet> specifies the url of the applet's class file to be loaded and executed.
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Allowing cross-origin use of images and canvas - HTML: Hypertext Markup Language
html provides a crossorigin attribute for images that, in combination with an appropriate cors header, allows images defined by the <img> element that are loaded from foreign origins to be used in a <canvas> as if they had been loaded from the current origin.
... as soon as you draw into a canvas any data that was loaded from another origin without cors approval, the canvas becomes tainted.
... the key is to use the crossorigin attribute by setting crossorigin on the htmlimageelement into which the image will be loaded.
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<img>: The Image Embed element - HTML: Hypertext Markup Language
alt text is also displayed on the page if the image can't be loaded for some reason: for example, network errors, content blocking, or linkrot.
... use both width and height to set the intrinsic size of the image, allowing it to take up space before it loads, to mitigate content layout shifts.
... image loading errors if an error occurs while loading or rendering an image, and an onerror event handler has been set on the error event, that event handler will get called.
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<input>: The Input (Form Input) element - HTML: Hypertext Markup Language
attributes for the <input> element include global html attributes and: attribute type or types description accept file hint for expected file type in file upload controls alt image alt attribute for the image type.
... required for accessibility autocomplete all hint for form autofill feature autofocus all automatically focus the form control when the page is loaded capture file media capture input method in file upload controls checked radio, checkbox whether the command or control is checked dirname text, search name of form field to use for sending the element's directionality in form submission disabled all whether the form control is disabled form all associates the control with a form element formaction image, submit url to use for form submission formenctype image, submit form data set encoding type to use for form submission formmethod image, submit ht...
... individual attributes accept valid for the file input type only, the accept attribute defines which file types are selectable in a file upload control.
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JavaScript modules - JavaScript
this can only be a good thing — browsers can optimize loading of modules, making it more efficient than having to use a library and do all of that extra client-side processing and extra round trips.
... note: if you want to download the examples and run them locally, you'll need to run them through a local web server.
... other differences between modules and standard scripts you need to pay attention to local testing — if you try to load the html file locally (i.e.
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Communicating using "port" - Archive of obsolete content
thus, to emit a message from a content script: self.port.emit("mycontentscriptmessage", mycontentscriptmessagepayload); to receive a message from the add-on code: self.port.on("myaddonmessage", function(myaddonmessagepayload) { // handle the message }); compare this to the technique used to receive built-in messages in the content script.
... it may be called with any number of parameters, but is most likely to be called with a name for the message and an optional payload.
... the payload can be any value that is serializable to json.
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jpm - Archive of obsolete content
download and install node.js from nodejs.org.
...thus, you will need to download and install a different version of firefox.
... -o --overload path rather than use the sdk modules built into firefox, use the modules found at path.
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HTML to DOM - Archive of obsolete content
mlparser() returns the element name html (instead of body), you have all document object with its complete functions list, therefore you can retrieve info within div tag like this: var dompars = htmlparser("<div id='userinfo'>john was a mediocre programmer, but people liked him <strong>anyway</strong>.</div>"); alert(dompars.getelementbyid('userinfo').innerhtml); to parse a complete html page, load it into an iframe whose type is content (not chrome).
... parsing complete html to dom loading an html document seems much simpler if it's loaded using the xmlhttprequest object.
... for that matter, we're going to load our html document first: var request = xmlhttprequest(); request.open("get", "http://example.org/file.html", false); request.send(null); our next step is to create the document object that will represent the dom into which we'll insert our newly-retrieved html: var doc = document.implementation.createhtmldocument("example"); doc.documentelement.innerhtml = request.responsetext; after this any manipulation that we might want to do will be something as simple as the following: doc.body.textcontent = "this is inside the body!"; using a hidden iframe element to parse html to a window's dom sample code may need more work.
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Signing an XPI - Archive of obsolete content
download the latest network security services (nss) package from the mozilla ftp site at https://ftp.mozilla.org/pub/mozilla.or.../nss/releases/.
...download the latest netscape portable runtime from the mozilla ftp site: http://ftp.mozilla.org/pub/mozilla.org/nspr/releases/.
...sa (deflated 35%) c:\projects\codesigning\signed> zip -r -d fsb.xpi * -x meta-inf/zigbert.rsa adding: meta-inf/manifest.mf (deflated 37%) adding: meta-inf/zigbert.sf (deflated 40%) adding: chrome/fsb.jar (deflated 74%) adding: chrome.manifest (deflated 69%) adding: install.rdf (deflated 62%) test your certificate to test your certificate, install it into your browser, and attempt to load the signed extension by following these steps: 1.
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Creating a Help Content Pack - Archive of obsolete content
understanding the syntax is important because small syntax errors can mean that a whole file won't be loaded correctly.
... however, while it may seem like this is a disadvantage, it's actually an advantage - if you make an error you'll know immediately, and you should be able to easily figure out what the problem is by directly loading the file in firefox.
... nc:defaulttopic will hold the rdf:id of the topic you want displayed when the viewer first loads if none has been specified.
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jspage - Archive of obsolete content
window(window);var document=new native({name:"document",legacy:(browser.engine.trident)?null:window.document,initialize:function(a){$uid(a);a.head=a.getelementsbytagname("head")[0]; a.html=a.getelementsbytagname("html")[0];if(browser.engine.trident&&browser.engine.version<=4){$try(function(){a.execcommand("backgroundimagecache",false,true); });}if(browser.engine.trident){a.window.attachevent("onunload",function(){a.window.detachevent("onunload",arguments.callee);a.head=a.html=a.window=null; });}return $extend(a,document.prototype);},afterimplement:function(b,a){document[b]=document.prototype[b]=a;}});document.prototype={$family:{name:"document"}}; new document(document);array.implement({every:function(c,d){for(var b=0,a=this.length;b<a;b++){if(!c.call(d,this[b],b,this)){return false;}}return t...
...var f=this[e][a].apply(this[e],arguments);c.push(f); if(g){g=($type(f)=="element");}}return(g)?new elements(c):c;});}});element.prototype={$family:{name:"element"}};element.constructors=new hash;var iframe=new native({name:"iframe",generics:false,initialize:function(){var f=array.link(arguments,{properties:object.type,iframe:$defined}); var d=f.properties||{};var c=document.id(f.iframe);var e=d.onload||$empty;delete d.onload;d.id=d.name=$pick(d.id,d.name,c?(c.id||c.name):"iframe_"+$time()); c=new element(c||"iframe",d);var b=function(){var g=$try(function(){return c.contentwindow.location.host;});if(!g||g==window.location.host){var h=new window(c.contentwindow); new document(c.contentwindow.document);$extend(h.element.prototype,element.prototype);}e.call(c.contentwindow,c.contentwindow.documen...
...t);};var a=$try(function(){return c.contentwindow; });((a&&a.document.body)||window.frames[d.id])?b():c.addlistener("load",b);return c;}});var elements=new native({initialize:function(f,b){b=$extend({ddup:true,cash:true},b); f=f||[];if(b.ddup||b.cash){var g={},e=[];for(var c=0,a=f.length;c<a;c++){var d=document.id(f[c],!b.cash);if(b.ddup){if(g[d.uid]){continue;}g[d.uid]=true; }if(d){e.push(d);}}f=e;}return(b.cash)?$extend(f,this):f;}});elements.implement({filter:function(a,b){if(!a){return this;}return new elements(array.filter(this,(typeof a=="string")?function(c){return c.match(a); }:a,b));}});document.implement({newelement:function(a,b){if(browser.engine.trident&&b){["name","type","checked"].each(function(c){if(!b[c]){return;}a+=" "+c+'="'+b[c]+'"'; if(c!="checked"){delete b[c];}});a="<"+a+...
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Same origin policy for XBL - Archive of obsolete content
when mozilla needs to decide whether or not xbl is allowed to be loaded, it looks at the nsiprincipal originating the load and the nsiuri to be loaded.
... determining the originating principal the principal originating the load is determined using the following steps: for external stylesheets (<link>, <?xml-stylesheet?>, user sheets, and ua sheets), it depends on where the sheet is loaded from, just like it would for an html document loaded from a similar source.
...for the nsidomdocumentxbl interface's nsidomdocumentxbl.addbinding() and nsidomdocumentxbl.loadbindingdocument() methods, the originating principal is the one of the script making the call, or the principal of the document the call is made on if there isn't a script.
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A XUL Bestiary - Archive of obsolete content
the chrome url, which appears in place of the http url in pointers like the following global skin processing instruction: <?xml-stylesheet href="chrome://global/skin/" type="text/css"?> specifies a chrome to be loaded by the gecko rendering engine.
... in the example above, the chrome is simply a skin file to be loaded into the xul file, but the chrome can also be used to load whole chromes, as when a <menuitem> in one window brings up a new chrome: <menuitem value="mozilla help" oncommand="window.opendialog('chrome://help/content/help.xul', '_blank', 'chrome,all,dialog=no')" /> in this example, the chrome url is being used to point to a chrome within the package hierarchy of the mozilla application.
...when you create different chrome for a package, you can create a subdirectory underneath content whose contents are loaded instead of default.
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Archived Mozilla and build documentation - Archive of obsolete content
generators can also be independently downloaded and installed by users if they include a list of pages to which they apply.
... creating a skin for firefox/getting started download the latest version of firefox and install it.
... download manager improvements in firefox 3 firefox 3 offers improvements to the download manager that allow multiple progress listeners, use of the storage api for data management, download resuming, and more.
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Web fonts - Learn web development
in this article we will go further, exploring web fonts in detail — these allow you to download custom fonts along with your web page, to allow for more varied, custom text styling.
...web fonts are a css feature that allows you to specify font files to be downloaded along with your website as it is accessed, meaning that any browser that supports web fonts can have exactly the fonts you specify available to it.
...the syntax required looks something like this: first of all, you have a @font-face block at the start of the css, which specifies the font file(s) to download: @font-face { font-family: "myfont"; src: url("myfont.woff"); } below this you can then use the font family name specified inside @font-face to apply your custom font to anything you like, as normal: html { font-family: "myfont", "bitstream vera serif", serif; } the syntax does get a bit more complex than this; we'll go into more detail below.
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How to build custom form controls - Learn web development
let's start by defining how the control reaches each state: the control is in its normal state when: the page loads.
... the script did not load: this is one of the most common cases, especially in the mobile world where the network is not very reliable.
... the user is interacting with the content before the javascript has been fully downloaded, parsed, and executed.
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Debugging on Windows
if vc++ and your mozilla application hang shortly after you launch the application under the debugger, see problems loading debug symbols.
...the msdev ide will launch and load the file where the assertion happened.
... setting breakpoints in dlls which are not yet loaded in memory vc++ 6.0: go to project > settings..., debug tab and select "additional dlls" from the drop down list.
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JNI.jsm
method overview cdata getforthread(); cdata loadclass(cdata ajenv, string aclassfullyqualifiedname, [optional] object adeclares); cdata newstring(cdata ajenv, string astr); string readstring(cdata ajenv, cdata ajavastring); void unloadclasses(); methods getforthread() blah blah cdata getforthread(); parameters this function does not take any arguments.
... return value blah blah loadclass() blah blah cdata loadclass( ajenv, afullyqualifiedname, [optional] object adeclares ); parameters ajenv the return value of getforthread().
... unloadclasses() blah blah void unloadclasses(); parameters this function takes no arguments.
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Observer Notifications
note that while the window are open and the chrome loaded the tabs in the windows may still be being restored after this notification.
...when this is sent, it is possible that other windows may still be open, such as the download manager or preferences.
... browser-delayed-startup-finished sent when the browser window and all its components have been loaded and initialized.
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imgIRequest
thod overview void cancelandforgetobserver(in nsresult astatus); imgirequest clone(in imgidecoderobserver aobserver); void decrementanimationconsumers(); imgirequest getstaticrequest(); void incrementanimationconsumers(); void lockimage(); void requestdecode(); void unlockimage(); attributes attribute type description corsmode long the cors mode that this image was loaded with.
... imageprincipal nsiprincipal the principal gotten from the channel the image was loaded from.
... uri nsiuri the uri the image load was started with.
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nsIContentViewer
void loadcomplete(in unsigned long astatus); void loadstart(in nsisupports adoc); void move(in long ax, in long ay); void open(in nsisupports astate, in nsishentry ashentry); void pagehide(in boolean isunload); boolean permitunload([optional] in boolean acallercloseswindow); boolean requestwindowclose(); void resetclosewindow(); voi...
... [noscript,notxpcom,nostdcall] void setnavigationtiming(in nsdomnavigationtimingptr atiming); void setpagemode(in boolean apagemode, in nsiprintsettings aprintsettings); void show(); void stop(); void unload(); obsolete since gecko 1.8 attributes attribute type description container nsisupports domdocument nsidomdocument enablerendering boolean obsolete since gecko 2.0 historyentry nsishentry get the history entry that this viewer will save itself into when destroyed.
...close() should be called when the load of a new page for the next content viewer begins, and destroy() should be called when the next content viewer replaces this one.
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Add to iPhoto
you can download an installable version of this extension on amo.
...you can download the extension and poke through the code inside it if you'd like to see all of it.
... addimagebyurl: function(src) { corefoundation.init(); carbon.init(); appservices.init(); // download the image var filepath = this.downloadimage(src); var mutablearray = corefoundation.cfarraycreatemutable(null, 1, corefoundation.kcftypearraycallbacks.address()); if (mutablearray) { var url = corefoundation.cfurlcreatefromfilesystemrepresentation(null, filepath, filepath.length, false); corefoundation.cfarrayappendvalue(mutablearray, url); corefoundation.cfrelease(url); ...
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Document.readyState - Web APIs
the document.readystate property describes the loading state of the document.
... syntax var string = document.readystate; values the readystate of a document can be one of following: loading the document is still loading.
... interactive the document has finished loading and the document has been parsed but sub-resources such as images, stylesheets and frames are still loading.
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Document - Web APIs
the document interface represents any web page loaded in the browser and serves as an entry point into the web page's content, which is the dom tree.
... document.timelineread only returns timeline as a special instance of documenttimeline that is automatically created on page load.
...possible values are visible, hidden, prerender, and unloaded.
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FontFaceSet - Web APIs
the fontfaceset interface of the css font loading api manages the loading of font-faces and querying of their download status.
... properties fontfaceset.status read only indicates the font-face's loading status.
... it will be one of 'loading' or 'loaded'.
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Timing element visibility with the Intersection Observer API - Web APIs
although many aspects of this example will not match real world usage (in particular, the articles all have the same text and aren't loaded from a database, and there are just a handful of simple text-only ads that are selected from an array), this should provide enough understanding of the api to quickly learn how to apply the intersection observer api to your own site.
... setting up to set things up, we run the startup() function below when the page loads: window.addeventlistener("load", startup, false); function startup() { contentbox = document.queryselector("main"); document.addeventlistener("visibilitychange", handlevisibilitychange, false); let observeroptions = { root: null, rootmargin: "0px", threshold: [0.0, 0.75] }; adobserver = new intersectionobserver(intersectioncallback, observeroptions)...
...aliquam sed magna aliquam, vestibulum nisi at," + " cursus nunc.</p>"; function buildcontents() { for (let i=0; i<5; i++) { contentbox.appendchild(createarticle(loremipsum)); if (!(i % 2)) { loadrandomad(); } } } the variable loremipsum contains the text we'll use for the body of all of our articles.
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PerformanceTiming - Web APIs
the performancetiming interface is a legacy interface kept for backwards compatibility and contains properties that offer performance timing information for various events which occur during the loading and use of the current page.
... these properties each describe the time at which a particular point in the page loading process was reached.
... performancetiming.navigationstart read only when the prompt for unload terminates on the previous document in the same browsing context.
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Using the Resource Timing API - Web APIs
the resource timing api provides a way to retrieve and analyze detailed network timing data regarding the loading of an application's resource(s).
... the interface's properties create a resource loading timeline with high-resolution timestamps for network events such as redirect start and end times, fetch start, dns lookup start and end times, response start and end times, etc.
... resource loading phases an application can get timestamps for the various phases of resource loading such as redirection, dns lookup, and tcp connection setup.
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Resource Timing API - Web APIs
the resource timing interfaces enable retrieving and analyzing detailed network timing data regarding the loading of an application's resource(s).
... an application can use the timing metrics to determine, for example, the length of time it takes to load a specific resource, such as an xmlhttprequest, <svg>, image, or script.
... the interface's properties create a resource loading timeline with high-resolution timestamps for network events such as redirect start and end times, dns lookup start and end times, request start, response start and end times, etc.
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Movement, orientation, and motion: A WebXR example - Web APIs
options this example has a number of options you can configure by adjusting the values of constants before you load it in the browser.
... starting up and shutting down webxr upon initially loading the script, we install a handler for the load event, so that we can perform initialization.
... window.addeventlistener("load", onload); function onload() { xrbutton = document.queryselector("#enter-xr"); xrbutton.addeventlistener("click", onxrbuttonclick); projectionmatrixout = document.queryselector("#projection-matrix div"); modelmatrixout = document.queryselector("#model-view-matrix div"); cameramatrixout = document.queryselector("#camera-matrix div"); mousematrixout = document.queryselector("#mouse-matrix div"); if (!navigator.xr || enableforcepolyfill) { console.log("using the polyfill"); polyfill = new webxrpolyfill(); } setupxrbutton(); } the load event handler gets a reference to the button that toggles webxr on and off into xrbutton, then adds a handler for click events.
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Starting up and shutting down a WebXR session - Web APIs
getting the extension download the webxr api emulator for your supported browser below: google chrome mozilla firefox the source code for the extension is also available on github.
... context requirements a webxr compatible environment starts with a securely-loaded document.
... your document needs to either have been loaded from the local drive (such as by using an url such as http://localhost/...), or using https when loading the page.
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Media events - Developer guides
canplaythrough sent when the readystate changes to have_enough_data, indicating that the entire media can be played without interruption, assuming the download rate remains at least at the current level.
... durationchange the metadata has loaded or changed, indicating a change in duration of the media.
... this is sent, for example, when the media has loaded enough that the duration is known.
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Content-Security-Policy - HTTP
the http content-security-policy response header allows web site administrators to control resources the user agent is allowed to load for a given page.
... directives fetch directives fetch directives control the locations from which certain resource types may be loaded.
... child-src defines the valid sources for web workers and nested browsing contexts loaded using elements such as <frame> and <iframe>.
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Codecs used by WebRTC - Web media technologies
this is due to a change in google play store requirements that prevent firefox from downloading and installing the openh264 codec needed to handle h.264 in webrtc connections.
... other notes the network payload format for sharing vp8 using rtp (such as when using webrtc) is described in rfc 7741: rtp payload format for vp8 video.
...this is useful to note, since in rfc 6184 ("rtp payload format for h.264 video"), profile-level-id is entirely optional.
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WebAssembly Concepts - WebAssembly
historically, the vm has been able to load only javascript.
... additionally, the cost of downloading, parsing, and compiling very large javascript applications can be prohibitive.
...(note that webassembly has the high-level goal of supporting languages with garbage-collected memory models in the future.) with the advent of webassembly appearing in browsers, the virtual machine that we talked about earlier will now load and run two types of code — javascript and webassembly.
...And 7 more matches

port - Archive of obsolete content
it may be called with any number of parameters, but is most likely to be called with a name for the message and an optional payload.
... the payload can be any value that is serializable to json.
... from the content script to the main add-on code: // content-script.js var mymessagepayload = "some data"; self.port.emit("mymessage", mymessagepayload); from the main add-on code to the content script: // main.js var mymessagepayload = "some data"; worker.port.emit("mymessage", mymessagepayload); on() the port.on() function registers a function as a listener for a particular message sent from the other side using port.emit().
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window/utils - Archive of obsolete content
parameters window : nsidomwindow returns nsidocshell getwindowloadingcontext(window) returns the nsiloadcontext.
... parameters window : nsidomwindow returns nsiloadcontext open(uri, options) this function is used to open top level (application) windows.
... parameters uri : string uri of the document to be loaded into the window.
...And 6 more matches

Low-Level APIs - Archive of obsolete content
/loader create commonjs module loaders.
... content/content re-exports three objects from three other modules: loader, worker, and symbiont.
... content/loader provides one of the building blocks for those modules that use content scripts to interact with web content, such as panel and page-mod.
...And 6 more matches

Modifying the Page Hosted by a Tab - Archive of obsolete content
to modify the page hosted by a particular tab, load one or more content scripts into it using attach() method of tab object.
...you could download this icon: .
...it has a click handler which fetches the active tab and loads a script into the page hosted by the active tab.
...And 6 more matches

Chapter 5: Let's build a Firefox extension - Archive of obsolete content
disabling this cache forces xul documents to be reloaded any every time they are displayed.
...you can learn more about chromebug and download it at http://getfirebug.com/wiki/index.php/chromebug_user_guide you may also find this extension to be valuable: extension developer https://addons.mozilla.org/firefox/addon/7434 developing extensions: what you need to know let’s delve into chrome, something you’ll need to know about in order to develop extensions.
... listing 5: content for clock.xul <?xml version="1.0"?> <?xml-stylesheet href="chrome://global/skin/"?> <dialog id="clockdialog" xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul" title="clock" buttons="accept" onload="initclock();"> <script type="application/javascript" src="chrome://helloworld/content/clock.js"/> <hbox align="center"> <label value="current time:" /> <textbox id="currenttime" /> </hbox> </dialog> listing 6: content for clock.js function initclock() { showcurrenttime(); window.setinterval(showcurrenttime, 1000); } function showcurrenttime() { var textbox = document.gete...
...And 6 more matches

Setting Up a Development Environment - Archive of obsolete content
all of our examples are handled with komodo edit, so if you see a .kpf or .komodoproject file in an example you download, this is a komodo project file.
...in cygwin installations you'll have to explicitly check the make and zip utilities from the long list of packages to download and install.
... build system let's start by downloading the project used to build the second version of hello world, from the exercise in the last section.
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Performance best practices in extensions - Archive of obsolete content
improving startup performance extensions are loaded and run whenever a new browser window opens.
... load only what you need, when you need it don't load things during startup that are only needed if the user clicks a button, or if a given preference is enabled when it's not.
... if your extension has features that only work when the user has logged into a service, don't load the resources for those features until the user actually logs in.
...And 6 more matches

Creating a dynamic status bar extension - Archive of obsolete content
concepts covered in the previous sample won't be reiterated here; instead, refer to the downloadable sample code or to the previous sample for further details.
... download the sample you can download a copy of this sample to look over, or to use as the basis for your own extension.
...download the sample update the install manifest replace all occurrences of the first sample's id, "status-bar-sample-1", with the new sample's id, "stockwatcher", and update the front end metadata to describe our new extension.
...And 6 more matches

Binding Attachment and Detachment - Archive of obsolete content
whenever an element is removed from a document, any bindings attached via css loaded by the document will be detached.
... <constructor> call as a document is loaded and style rules are matched for elements, any binding documents that are encountered will load as needed.
... binding document loads suppress the firing of the dom load event for the bound document.
...And 6 more matches

Introduction - Archive of obsolete content
the template builder loads the datasource, performs a query on the datasource and generates content based on the results in combination with the template.
...the template builder loads an rdf datasource using the rdf service in the same way as you would create a datasource through the rdf service directly.
... the datasource is loaded via its url.
...And 6 more matches

Template Builder Interface - Archive of obsolete content
the processes of creating a builder for an element applies both when an element is created when the window is loaded and when an element is inserted dynamically.
...the only difference is that the datasource has already loaded so the data will be the same.
...for rdf datasources, the builder's refresh method, however, will reload the datasources.
...And 6 more matches

Index - Learn web development
it allows you to upload code repositories for storage in the git version control system.
... 21 how do you upload your files to a web server?
... beginner, ftp, github, uploading, webmechanics, hosting, rsync, sftp if you have built a simple web page (see html basics for an example), you will probably want to put it online, on a web server.
...And 6 more matches

Package management basics - Learn web development
a bundle is the term that’s generally used to refer to a single file on your web server that contains all the javascript for your software — typically compressed as much as possible to help reduce the time it takes to get your software downloaded and displayed in your visitors’ browser.
... in theory you may not need a package manager and you could manually download and store your project dependencies, but a package manager will seamlessly handle installing and uninstalling packages.
... downloading them and putting them in the correct locations in your project.
...And 6 more matches

Gecko info for Windows accessibility vendors
ajax: asynchronous javascript and xml ajax is a method of building interactive web applications that process user requests, user actions immediately in real time, unlike an http request, during which users must wait for a whole page to reload or for a new page to load.
... firefox (please use version 1.1 alpha builds or later) thunderbird (please use version 1.1 alpha builds or later) mozilla seamonkey (please use 1.8 alpha builds or later) how to find the content window and load the document screen readers need to find the content window so that they know where to start grabbing the msaa tree, in order to load the current document into a buffer in their own process.
... gecko also helps determine when to load a new window by firing two event_state_change's on the root role_document accessible -- the first state change indicates the document pane is now busy loading.
...And 6 more matches

Embedding Tips
how do i load a page?
... get thensiwebnavigation interface on your webbrowser and call the loaduri method with the appropriate uri and flags.
... this interface also has methods for reloading, stopping a load and going back and forward in the history.
...And 6 more matches

AddonInstall
an addoninstall instance tracks download and installation process of an add-on.
...once you have an instance the install() method is used to start automatic download and installation.
... error integer if an error has been encountered during the download or install this will hold the error code.
...And 6 more matches

WebRequest.jsm
browser object the xul browser into which the resource will be loaded, or null if the resource will not be loaded into a xul browser.
... browser object the xul browser into which the resource will be loaded, or null if the resource will not be loaded into a xul browser.
... browser object the xul browser into which the resource will be loaded, or null if the resource will not be loaded into a xul browser.
...And 6 more matches

Investigating leaks using DMD heap scan mode
you need the cycle collector analysis script find_roots.py, which can be downloaded as part of this repo on github.
... the output will look something like this, after a message about loading progress: 0x7f0882fe3230 [fragmentorelement (xhtml) script https://www.example.com] --[[via hash] mlistenermanager]--> 0x7f0899b4e550 [eventlistenermanager] --[mlisteners event=onload listenertype=3 [i]]--> 0x7f0882ff8f80 [callbackobject] --[mincumbentglobal]--> 0x7f0897082c00 [nsglobalwindowinner # 2147483662 inner https://www.example.com] root 0x7f0882fe3230 is a ref cou...
... example analysis of block_analyzer.py results in one debugging session where i was investigating the leak from bug 1451985, i eventually reduced the list of entries until this was the most suspicious looking entry: 0x7f0892f29630 size = 392 bytes at byte offset 56 mozilla::dom::scriptloader::processexternalscript[...] [...] i went to that line of scriptloader::processexternalscript(), and it contained a call to scriptloader::createloadrequest().
...And 6 more matches

A brief guide to Mozilla preferences
it provides a general overview of mozilla preferences, including where preferences are stored, a file-by-file analysis of preference loading sequence, and information on editing preferences.
... preferences files to protect privacy by preventing inadvertent loading of a preferences file in the browser, the first line of the file is made un-parseable and skipped on loading.
... on application launch, several preferences files are loaded.
...And 6 more matches

Building the WebLock UI
first of all, it's important to be able to represent the basic state of the lock as soon as it's loaded.
...this is a bit more complicated, because it requires that you work with the currently loaded page or provide other ui (e.g., a textfield where you can enter an arbitrary url) for specifying urls.
...that function uses the opendialog method from the window object and takes the url to the xul file in which the dialog is defined: function loadweblock() { window.opendialog("chrome://weblock/weblock.xul"); } xul the entire user interface of the mozilla browser and all of the applications that go with it, including the mail client, the irc client, and others, have been defined in an xml language called xul.
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nsIDOMWindowUtils
tsummary(in long ascript); astring getpccountscriptcontents(in long ascript); void getscrollxy(in boolean aflushlayout, out long ascrollx, out long ascrolly); astring getvisiteddependentcomputedstyle(in nsidomelement aelement, in astring apseudoelement, in astring apropertyname); boolean isinmodalstate(); void leavemodalstate(); void loadsheet(in nsiuri sheeturi, in unsigned long type); nsidomnodelist nodesfromrect(in float ax, in float ay, in float atopsize, in float arightsize, in float abottomsize, in float aleftsize, in boolean aignorerootscrollframe, in boolean aflushlayout); void processupdates(); obsolete since gecko 13.0 void purgepccounts(); unsigned long redraw([optional] in unsi...
... this is used on mobile, for example, to prevent attempts to render content until enough of the page has been loaded to avoid content bouncing around excessively as more content is loaded.
... select_character 0 select_cluster 1 select_word 2 select_line 3 select_beginline 4 select_endline 5 select_paragraph 6 select_wordnospace 7 agent_sheet 0 a possible type of a style sheet loaded/removed with loadsheet()/removesheet().
...And 6 more matches

Introduction to DOM Inspector - Firefox Developer Tools
note: starting with firefox 3, the dom inspector is not included in firefox by default; instead, you must download and install it from the mozilla add-ons web site.
... inspecting a document when the dom inspector opens, it may or may not load an associated document, depending on the host application.
... if the dom inspector doesn't automatically load a document or loads a document other than the one you'd like to inspect, you can select the desired document a few different ways.
...And 6 more matches

Network request list - Firefox Developer Tools
the request list of the network monitor shows a list of all the network requests made in the course of loading the page.
... network request list by default, the network monitor shows a list of all the network requests made in the course of loading the page.
... each request is displayed in its own row: by default, the network monitor is cleared each time you navigate to a new page or reload the current page.
...And 6 more matches

Responsive Design Mode - Firefox Developer Tools
orientation (portrait or landscape) - this setting persists between sessions screenshots are saved to firefox's default download location.
...n - take a screenshot settings button - opens the rdm settings menu close button - closes rdm mode and returns to regular browsing the settings menu includes the following commands: left-align viewport - when checked moves the rdm viewport to the left side of the browser window show user agent - when checked displays the user agent string the final two options define when the page is reloaded: reload when touch simulation is toggled: when this option is enabled, the page is reloaded whenever you toggle touch support.
... reload when user agent is changed: when this option is enabled, the page isreloaded whenever the user agent is changed.
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Drawing shapes with canvas - Web APIs
rectangular shape example <html> <body onload="draw();"> <canvas id="canvas" width="150" height="150"></canvas> </body> </html> function draw() { var canvas = document.getelementbyid('canvas'); if (canvas.getcontext) { var ctx = canvas.getcontext('2d'); ctx.fillrect(25, 25, 100, 100); ctx.clearrect(45, 45, 60, 60); ctx.strokerect(50, 50, 50, 50); } } this example's output is shown below.
... drawing a triangle for example, the code for drawing a triangle would look something like this: <html> <body onload="draw();"> <canvas id="canvas" width="100" height="100"></canvas> </body> </html> function draw() { var canvas = document.getelementbyid('canvas'); if (canvas.getcontext) { var ctx = canvas.getcontext('2d'); ctx.beginpath(); ctx.moveto(75, 50); ctx.lineto(100, 75); ctx.lineto(100, 25); ctx.fill(); } } the result looks like this: screenshotlive sample movi...
... <html> <body onload="draw();"> <canvas id="canvas" width="150" height="150"></canvas> </body> </html> function draw() { var canvas = document.getelementbyid('canvas'); if (canvas.getcontext) { var ctx = canvas.getcontext('2d'); ctx.beginpath(); ctx.arc(75, 75, 50, 0, math.pi * 2, true); // outer circle ctx.moveto(110, 75); ctx.arc(75, 75, 35, 0, math.pi, false); // mouth (clockwise)...
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Introduction to the File and Directory Entries API - Web APIs
sample use cases the following are just a few examples of how you can use the file and directory entries api: apps with persistent uploader when a file or directory is selected for upload, you can copy the file into a local sandbox and upload a chunk at a time.
... the app can restart uploads after an interruption, such as the browser being closed or crashing, connectivity getting interrupted, or the computer getting shut down.
... video game or other apps with lots of media assets the app downloads one or several large tarballs and expands them locally into a directory structure.
...And 6 more matches

HTMLImageElement.complete - Web APIs
the read-only htmlimageelement interface's complete attribute is a boolean value which indicates whether or not the image has completely loaded.
... syntax let doneloading = htmlimageelement.complete; value a boolean value which is true if the image has completely loaded; otherwise, the value is false.
... the image is considered completely loaded if any of the following are true: neither the src nor the srcset attribute is specified.
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Ajax navigation example - Web APIs
to see how it works, please create the following files (or git clone https://github.com/giabao/mdn-ajax-nav-example.git ): note: for fully integrating the <form> elements within this mechanism, please take a look at the paragraph submitting forms and uploading files.
...ontent.php"; ?> <p>this paragraph is shown only when the navigation starts from <strong>third_page.php</strong>.</p> <div id="ajax-content"> <?php echo $page_content; ?> </div> <p>this paragraph is shown only when the navigation starts from <strong>third_page.php</strong>.</p> <?php include "include/after_content.php"; echo "</body>\n</html>"; } ?> css/style.css: #ajax-loader { position: fixed; display: table; top: 0; left: 0; width: 100%; height: 100%; } #ajax-loader > div { display: table-cell; width: 100%; height: 100%; vertical-align: middle; text-align: center; background-color: #000000; opacity: 0.65; } include/after_content.php: <p>this is the footer.
...rd example</a> | <a class="ajax-nav" href="unexisting.php">unexisting page</a> ] </p> include/header.php: <meta http-equiv="content-type" content="text/html; charset=utf-8" /> <script type="text/javascript" src="js/ajax_nav.js"></script> <link rel="stylesheet" href="css/style.css" /> js/ajax_nav.js: "use strict"; const ajaxrequest = new (function () { function closereq () { oloadingbox.parentnode && document.body.removechild(oloadingbox); bisloading = false; } function abortreq () { if (!bisloading) { return; } oreq.abort(); closereq(); } function ajaxerror () { alert("unknown error."); } function ajaxload () { var vmsg, nstatus = this.status; switch (nstatus) { case 200: ...
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PerformanceNavigationTiming - Web APIs
for example, this interface can be used to determine how much time it takes to load or unload a document.
... performanceentry.duration read only returns a timestamp that is the difference between the performancenavigationtiming.loadeventend and performanceentry.starttime properties.
... performancenavigationtiming.domcontentloadedeventend read only a domhighrestimestamp representing the time value equal to the time immediately after the current document's domcontentloaded event completes.
...And 6 more matches

Animating textures in WebGL - Web APIs
our sample loads a copy from a cdn in our html's <head>.
...we need both of these checks because it will produce an error if you upload a video to webgl that has no data available yet.
... checking for both of these events guarantees there is data available and it's safe to start uploading video to a webgl texture.
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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 the string "blob" to the responsetype property.
... var oreq = new xmlhttprequest(); oreq.open("get", "/myfile.png", true); oreq.responsetype = "blob"; oreq.onload = function(oevent) { var blob = oreq.response; // ...
... }; oreq.send(); receiving binary data in older browsers the load_binary_resource() function shown below loads binary data from the specified url, returning it to the caller.
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<a>: The Anchor element - HTML: Hypertext Markup Language
downloadhtml5 prompts the user to save the linked url instead of navigating to it.
... notes: download only works for same-origin urls, or the blob: and data: schemes.
... if content-disposition has a different filename than download, the header takes priority.
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<iframe>: The Inline Frame element - HTML: Hypertext Markup Language
importance the download priority of the resource in the <iframe>'s src attribute.
... high the resource should be downloaded before other lower-priority page resources.
... low the resource should be downloaded after other higher-priority page resources.
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<input type="image"> - HTML: Hypertext Markup Language
formaction the url to which to submit the data formenctype the encoding method to use when submitting the form data formmethod the http method to use when submitting the form formnovalidate a boolean which, if present, indicates that the form shouldn't be validated before submission formtarget a string indicating a browsing context from where to load the results of submitting the form height the height, in css pixels, at which to draw the image src the url from which to load the image width the width, in css pixels, at which to draw the image alt the alt attribute provides an alternate string to use as the button's label if the image cannot be shown (due to error, a user agent that cannot or is conf...
... in addition to the actual names of tabs, windows, or inline frames, there are a few special keywords that can be used: _self loads the response into the same browsing context as the one that contains the form.
... _blank loads the response into a new, unnamed, browsing context.
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HTTP headers - HTTP
this is used to update caches (for safe requests), or to prevent to upload a new resource when one already exists.
... downloads content-disposition indicates if the resource transmitted should be displayed inline (default behavior without the header), or if it should be handled like a download and the browser should present a “save as” dialog.
... x-forwarded-for identifies the originating ip addresses of a client connecting to a web server through an http proxy or a load balancer.
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Recommended Web Performance Timings: How long is too long? - Web Performance
there are no clear set rules as to what constitutes a slow pace when loading pages, but there are specific guidelines for indicating content will load (1 second), idling (50ms), animating (16.7s) and responding to user input (50 to 200ms).
... load goal the 'under a second' is often touted as optimal for load, but what does that mean?
... a second should be considered a rule in the maximum amount of time to indicate to a user that the request for new content was made and will load, such as the browser displaying the page title and the background color of the page displaying.
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Optimizing startup performance - Web Performance
does it seem to lock up the device or the user's browser while the app loads?
...this allows html parsers to continue processing the document, instead of having to wait until the scripts have been downloaded and executed before continuing.
...load them only when needed.
...And 6 more matches

mimeTypes.rdf corruption - SVG: Scalable Vector Graphics
if the blue square with the white cross displays when you load this scripting across embed demo, then you are not experiencing this problem.
...for files loaded over the network via http, it requires and uses the value assigned to the content-type http header.
... for files loaded locally, it first looks in a cache of filename extension to media type mappings (stored in a mozilla profile file called mimetypes.rdf), and if it doesn't find a media type there, it asks the operating system.
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Understanding WebAssembly text format - WebAssembly
note: this is potentially overkill if you are a web developer who just wants to load a wasm module into a page and use it in your code (see using the webassembly javascript api), but it is more useful if for example, you want to write wasm modules to optimize the performance of your javascript library, or build your own webassembly compiler.
... next, we’ll load our binary into a typed array called addcode (as described in fetching webassembly bytecode), compile and instantiate it, and execute our add function in javascript (we can now find add() in the exports property of the instance): webassembly.instantiatestreaming(fetch('add.wasm')) .then(obj => { console.log(obj.instance.exports.add(1, 2)); // "3" }); note: you can find this example in...
...webassembly contains instructions like i32.load and i32.store for reading and writing from linear memory.
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Connecting to Remote Content - Archive of obsolete content
let url = "http://www.example.com/"; let request = components.classes["@mozilla.org/xmlextras/xmlhttprequest;1"] .createinstance(components.interfaces.nsixmlhttprequest); request.onload = function(aevent) { window.alert("response text: " + aevent.target.responsetext); }; request.onerror = function(aevent) { window.alert("error status: " + aevent.target.status); }; request.open("get", url, true); request.send(null); in this example we demonstrate how to make a xmlhttprequest call in asynchronous mode.
... following initialization, onload and onerror handlers are registered to a callback function to handle the response returned from the remote server.
...in the onload callback function, the responsetext parameter contains the server response as text.
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Java in Firefox Extensions - Archive of obsolete content
these 2 objects let you make use of the standard jdk classes, e.g., var ajavalist = new java.util.linkedlist(); if you want to load your own jars, then you can create your own java class loader.
...if you call java from xul, then each firefox window will have its own class loader and hence its own "singleton".
...[note: a simpler hello world version than that below is now available at http://brett-zamir.me/java_demo/ ] for privileges, the basic procedure is: download and include http://simile.mit.edu/repository/jav...nsionutils.jar within your extension (you can also build your own from the source files at http://simile.mit.edu/repository/jav...xtensionutils/ ) build and add references leading to this jar and all other jars in your extension within an array of java.net.url's, pass to java.net.urlclassloader to get a class loader, and finally pass the classlo...
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Microsummary topics - Archive of obsolete content
for example, the following code snippet installs the microsummary generator from the creating a microsummary tutorial: var generatortext = ' \ <?xml version="1.0" encoding="utf-8"?> \ <generator xmlns="http://www.mozilla.org/microsummaries/0.1" \ name="firefox download count" \ uri="urn:{835daeb3-6760-47fa-8f4f-8e4fdea1fb16}"> \ <template> \ <transform xmlns="http://www.w3.org/1999/xsl/transform" version="1.0"> \ <output method="text"/> \ <template match="/"> \ <value-of select="id(\'download-count\')"/> \ <text> fx downloads</text> \ </template> \ </transform> \ </template> \ <pag...
...note: when web sites install generators via window.sidebar.addmicrosummarygenerator(), firefox sets their uri attribute to urn:source:sourceurl, where sourceurl is the url from which the generator was downloaded.
... in the future, firefox may access source urls to download updated versions of generators, so unless you are installing generators which are available from urls, you should not use this form for your programmatically-installed generators.
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XUL Events - Archive of obsolete content
attribute: onkeyup load this event is sent to the window after it has been fully loaded.
...this event may also be used on the image element, or an element that accepts an image attribute, and will be fired when the image has finished loading.
... for images, this event does not bubble up the element tree, so it will not conflict with the window's load event.
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Complete - Archive of obsolete content
if you want to see these techniques in action, then you can download and install the complete allcustom extension: allcustom.xpi (the link is external only because this wiki does not support xpi files.) the extension does not contain any useful functions.
...to see the code, use a jar tool or zip tool to unpack the xpi file that you downloaded.
...the extension is supplied as a xpi, which is compressed to reduce download times.
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editor - Archive of obsolete content
to specify the document to load in the editor use the src attribute.
...to enable editing on an editor, do either of the following: set the src attribute on the editor after the outer window has loaded, for example, in the onload handler.
... call the makeeditable method to make the document loaded in the editor editable.
...And 5 more matches

iframe - Archive of obsolete content
the type of browser, which can be used to set access of the document loaded inside the browser.
... if this is not set, the loaded document has the same access as the window containing the browser.
... more precisely: the document loaded into a chrome window is always of chrome type.
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NPN_GetURL - Archive of obsolete content
values: _blank or _new: load the link in a new blank unnamed window.
... _self or _current: load the link into the same window the plug-in instance occupies.
... not recommended; if target refers to the window or frame containing the instance, the instance is destroyed and the plug-in may be unloaded.
...And 5 more matches

Theme changes in Firefox 2 - Archive of obsolete content
preferences/downloads.xul - removed from firefox 2.
... 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 browsermessage toolbar[iconsize="small"] #bookmarks-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 toolb...
...And 5 more matches

What software do I need to build a website? - Learn web development
in this article we lay out which software components you need when you're editing, uploading, or viewing a website.
... objective: learn which software components you need if you want to edit, upload, or view a website.
... summary you can download most of the programs you need for web development for free.
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What’s in the head? Metadata in HTML - Learn web development
previous overview: introduction to html next the head of an html document is the part that is not displayed in the web browser when the page is loaded.
... let's revisit the simple html document we covered in the previous article: <!doctype html> <html> <head> <meta charset="utf-8"> <title>my test page</title> </head> <body> <p>this is my page</p> </body> </html> the html head is the contents of the <head> element — unlike the contents of the <body> element (which are displayed on the page when loaded in a browser), the head's content is not displayed on the page.
... the <h1> element appears on the page when loaded in the browser — generally this should be used once per page, to mark up the title of your page content (the story title, or news headline, or whatever is appropriate to your usage.) the <title> element is metadata that represents the title of the overall html document (not the document's content.) active learning: inspecting a simple example to start off this active learning, we'd like...
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From object to iframe — other embedding technologies - Learn web development
these were considered the height of coolness in the mid to late 90s, and there was evidence that having a webpage split up into smaller chunks like this was better for download speeds — especially noticeable with network connections being so slow back then.
...!1m3!1d37995.65748333395!2d-2.273568166412784!3d53.473310471916975!2m3!1f0!2f0!3f0!3m2!1i1024!2i768!4f13.1!3m3!1m2!1s0x487bae6c05743d3d%3a0xf82fddd1e49fc0a1!2sthe+lowry!5e0!3m2!1sen!2suk!4v1518171785211" width="600" height="450" frameborder="0" style="border:0" allowfullscreen>\n</iframe>'; let solutionentry = htmlsolution; textarea.addeventlistener('input', updatecode); window.addeventlistener('load', updatecode); // stop tab key tabbing out of textarea and // make it write a tab at the caret position instead textarea.onkeydown = function(e){ if (e.keycode === 9) { e.preventdefault(); insertatcaret('\t'); } if (e.keycode === 27) { textarea.blur(); } }; function insertatcaret(text) { const scrollpos = textarea.scrolltop; const caretpos = textarea.selectionstart; ...
... note: in order to improve speed, it's a good idea to set the iframe's src attribute with javascript after the main content is done with loading.
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Video and audio content - Learn web development
on top of that, both desktop and mobile browsers may be designed to offload handling of media playback (either for all media or only for specific types it can't handle internally).
...iftype isn't included, browsers will load and try to play each file until they find one that works, which obviously takes time and is an unnecessary use of resources.
...take a look at our next example: <video controls width="400" height="400" autoplay loop muted preload="auto" poster="poster.png"> <source src="rabbit320.mp4" type="video/mp4"> <source src="rabbit320.webm" type="video/webm"> <p>your browser doesn't support html video.
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Graceful asynchronous programming with Promises - Learn web development
first of all, download our simple html template and the sample image file that we'll fetch.
... we immediately run the blob() method on this response to ensure that the response body is fully downloaded, and when it is available transform it into a blob object that we can do something with.
... if you save the html file you've just created and load it in your browser, you'll see that the image is displayed in the page as expected.
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Web performance resources - Learn web development
using resource hints such as rel=preconnect, rel=dns-prefetch, rel=prefetch, and rel=preload keep the size of javascript to a minimum.
... use a cdn for resources which can reduce load times significantly.
... lazy loading parts of your application outside the viewport.
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TypeScript support in Svelte - Learn web development
code along with us git clone the github repo (if you haven't already done it) with: git clone https://github.com/opensas/mdn-svelte-tutorial.git then to get to the current app state, run cd mdn-svelte-tutorial/07-typescript-support or directly download the folder's content: npx degit opensas/mdn-svelte-tutorial/07-typescript-support remember to run npm install && npm run dev to start your app in development mode.
... then you'll have to tell npm to download dependencies and start the project in development mode, like we usually do: npm install npm run dev adding typescript support to an existing svelte project to add typescript support to an existing svelte project you can follow these instructions.
... alternatively, you can download the setuptypescript.js file to a scripts folder inside your project's root folder, and then run node scripts/setuptypescript.js.
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Implementing feature detection - Learn web development
download the latest version (see manual installation), unzip the zip file, copy the html5shiv-printshiv.min.js and html5shiv.min.js files into your example directory, and link to one of the files by putting the following under your <title> element: <script src="html5shiv.min.js"></script> have a look at your example css files — you'll see that basic-styling.css handles all the styling that we want ...
...download this now by: clicking on the development build link.
... clicking the top download link in the dialog box that appears.
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Introducing a complete toolchain - Learn web development
you would handcode the html, use "vanilla javascript" (meaning no frameworks or intermediary languages), and manually upload it all to a server for hosting.
... git can be downloaded and installed via the git-scm website — download the relevant installer for your system, run it, and follow the on-screen prompts.
... to get hold of the code files, visit https://github.com/remy/mdn-will-it-miss and download and unzip the contents of this repo onto your local drive somewhere.
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Performance
performance best practices declaring stateless functions once per process bad: // addon.js services.mm.loadframescript("framescript.js", true) // framescript.js const precomputedconstants = // ...
...alternatively the frame's unload event or weak maps can be used to ensure that frames can be cleaned up when their respective tab is closed.
... better: content-document-global-created notifications can be substituted with domwindowcreated events other observers and services should be registered in a process script or jsm instead load frame scripts on demand bad: // addon.js services.mm.loadframescript("framescript.js", /*delayed:*/ true) // stuff communicating with the framescript // framescript.js function onlyonceinabluemoon() { // we only need this during a total solar eclipse while goat blood rains from the sky sendasyncmessage('my-addon:paragraph-count', {num: content.document.queryselectorall('p').length}) } ...
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Process scripts
however, a problem with frame scripts is that they can be loaded multiple times in the content process, in multiple scopes that are insulated from each other.
... for example, if you call the global frame message manager's loadframescript() function, then the script will be loaded separately into all open tabs.
...but if you register it in a frame script, and the frame script is loaded more than once, you'll register the content policy more than once, which probably isn't what you intend.
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mozbrowsersecuritychange
this may mean that the request is being loaded as part of a page in which some content was received over an insecure channel.
... trackingstate a domstring representing the current loading state of tracking content.
... possible values are: loaded_tracking_content: indicates that the tracking content has been loaded.
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Overview of Mozilla embedding APIs
each service is represented by a singleton object which is instantiated the first time it is requested and remains alive until the service manager is shut down, or the service is explicitly unloaded.
... through the service manager, individual services can be loaded, unloaded and accessed.
...contract-id: ns_componentmanager_contractid implemented interfaces: nsicomponentmanager nsiinterfacerequestor requestor interfaces: nsiservicemanager related interfaces: nsifactory nsuriloader the nsuriloader service is responsible for targeting a uri at an appropriate content handler.
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AddonManager
callback, in string mimetype, in string hash, in string name, in string iconurl, in string version, in nsiloadgroup loadgroup) promise?
... state_downloading an install that is in the process of being downloaded.
... state_downloaded an install that has finished downloading and is ready to install.
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Using JavaScript code modules
the module is loaded into a specific javascript scope, such as xul script or javascript xpcom script, using components.utils.import() or components.utils["import"]().
...(the url in the example is "resource://app/my_module.jsm".) code modules can only be loaded using a chrome: (), resource:, or file: url.
... sharing objects using code modules an extremely important behavior of components.utils.import() is that modules are cached when loaded and subsequent imports do not reload a new version of the module, but instead use the previously cached version.
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Localization and Plurals
the extension will load each property and display the plural forms in a table.
... chrome://mozapps/locale/downloads/do...tes,hours,days chrome://mozapps/locale/downloads/do...dstitlepercent chrome://browser/locale/browser.prop...auseddownloads version history 0.1: initial version with pluralrule check, properties input loading, table generation, sample output display 0.2: use pluralform.numforms() to get the number of forms instead of figuring out locally to better support future rules - requires build from 2007/01/27 or later 0.3: generate a list of what numbers...
... loading pluralform.jsm loading the pluralform module from javascript is simple with components.utils.import.
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Dynamic Library Linking
this section describes nspr's programming interface to load, unload and resolve symbols in dynamic libraries.
... it also provides a method by which to condition symbols of statically linked code so that to other clients it appears as though they are dynamically loaded.
... library linking types these data types are defined for dynamic library linking: prlibrary prstaticlinktable library linking functions the library linking functions are: pr_setlibrarypath pr_getlibrarypath pr_getlibraryname pr_freelibraryname pr_loadlibrary pr_unloadlibrary pr_findsymbol pr_findsymbolandlibrary finding symbols defined in the main executable program pr_loadlibrary cannot open a handle that references the main executable program.
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NSS tools : modutil
-rawlist display the module specs for a specified module or for all loadable modules.
... modulespec give the security module spec to load into the security database.
... -secmod secmodname give the name of the security module database (like secmod.db) to load.
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NSS tools : modutil
-rawlist display the module specs for a specified module or for all loadable modules.
... modulespec give the security module spec to load into the security database.
... -secmod secmodname give the name of the security module database (like secmod.db) to load.
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XPCOM changes in Gecko 2.0
prior to gecko 2, during component registration, all binary and javascript component files were loaded and called, asking them to register themselves.
...the component is loaded only when the xpcom component manager needs to create a component.
...typically, extensions observed app-startup because in the past, you needed to load for app-startup in order to be able to register to observe profile-after-change in the first place.
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nsICookieService
netwerk/cookie/public/nsicookieservice.idlscriptable provides methods for setting and getting cookies in the context of a page load.
... reload the entire cookie list was changed, and the observer should reload the list of cookies.
... achannel the channel used to load the document.
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nsIMsgFolder
inherits from: nsisupports method overview void startfolderloading(); void endfolderloading(); void updatefolder(in nsimsgwindow awindow); nsimsgfilterlist getfilterlist(in nsimsgwindow msgwindow); void setfilterlist(in nsimsgfilterlist filterlist); void forcedbclosed(); void delete(); void deletesubfolders(in nsisupportsarray folders, in nsimsgwindow msgwindow); void propagatedelete(in nsimsgfolder folder, in boolean deletestorage,in nsimsgwindow msgwindow); ...
...imsgdatabase msgdatabase); nsimsgdatabase getdbfolderinfoanddb(out nsidbfolderinfo folderinfo); nsimsgdbhdr getmessageheader(in nsmsgkey msgkey); boolean shouldstoremsgoffline(in nsmsgkey msgkey); boolean hasmsgoffline(in nsmsgkey msgkey); nsiinputstream getofflinefilestream(in nsmsgkey msgkey, out pruint32 offset, out pruint32 size); void downloadmessagesforoffline(in nsisupportsarray messages, in nsimsgwindow window); nsimsgfolder getchildwithuri(in acstring uri, in boolean deep, in boolean caseinsensitive); void downloadallforoffline(in nsiurllistener listener, in nsimsgwindow window); void enablenotifications(in long notificationtype, in boolean enable, in boolean dbbatching); boolean iscommandenabled...
...utstream astream, in long abytestoread, in long amaxoutputlen, in boolean acompressquotes); attributes attribute type description supportsoffline boolean readonly offlinestoreoutputstream nsioutputstream readonly offlinestoreinputstream nsiinputstream readonly retentionsettings nsimsgretentionsettings downloadsettings nsimsgdownloadsettings sortorder long used for order in the folder pane, folder pickers, etc.
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nsISHistory
to create an instance, use: var shistory = components.classes["@mozilla.org/browser/shistory;1"] .createinstance(components.interfaces.nsishistory); method overview void addshistorylistener(in nsishistorylistener alistener); nsishentry getentryatindex(in long index, in boolean modifyindex); void purgehistory(in long numentries); void reloadcurrententry(); void removeshistorylistener(in nsishistorylistener alistener); attributes attribute type description count long the number of toplevel documents currently available in session history.
... requestedindex long the index of the last document that started to load that is not yet finished loading.
... when the document finishes loading the value -1 is returned.
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nsIStyleSheetService
to create an instance, use: var stylesheetservice = components.classes["@mozilla.org/content/style-sheet-service;1"] .getservice(components.interfaces.nsistylesheetservice); method overview void loadandregistersheet(in nsiuri sheeturi, in unsigned long type); boolean sheetregistered(in nsiuri sheeturi, in unsigned long type); void unregistersheet(in nsiuri sheeturi, in unsigned long type); constants constant value description agent_sheet 0 user_sheet 1 ...
... author_sheet 2 methods loadandregistersheet() synchronously loads a style sheet from sheeturi and adds it to the list of user or agent style sheets.
... a user sheet loaded via this api will come before usercontent.css and userchrome.css in the cascade (so the rules in it will have lower precedence than rules in those sheets).
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nsIXMLHttpRequest
the most obvious benefit is that we can set nsirequest - constants in the xhr.channel.loadflags.
... for instance, as done in example 2, the flag of load_anonymous is added, this strips all user data (cookies, tokens, etc).
... using event handlers from native code (not sure if it's up-to-date) from native code, the way to set up onload and onerror handlers is a bit different.
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Mozilla
the articles below include content about downloading and building mozilla code.
...all top level document loading (navigation) channels are set chooseapplicationcache flag, which happens in nsdocshell::douriload().
...nsiapplicationcacheservice::chooseapplicationcache is given the url the channel is about to load.
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HTMLImageElement - Web APIs
htmlimageelement.alt a domstring that reflects the alt html attribute, thus indicating the alternate fallback content to be displayed if the image has not been loaded.
...that means this value is also true if the image has no src value indicating an image to load.
... htmlimageelement.currentsrc read only returns a usvstring representing the url from which the currently displayed image was loaded.
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Adding 2D content to a WebGL context - Web APIs
we're loading a copy from a cdn in our html's <head>.
...the code below creates the two shaders by calling loadshader(), passing the type and source for the shader.
... // // initialize a shader program, so webgl knows how to draw our data // function initshaderprogram(gl, vssource, fssource) { const vertexshader = loadshader(gl, gl.vertex_shader, vssource); const fragmentshader = loadshader(gl, gl.fragment_shader, fssource); // create the shader program const shaderprogram = gl.createprogram(); gl.attachshader(shaderprogram, vertexshader); gl.attachshader(shaderprogram, fragmentshader); gl.linkprogram(shaderprogram); // if creating the shader program failed, alert if (!gl.getprogramparameter(shaderprogram, gl.link_status)) { alert('unable to initialize the shader program: ' + gl.getprograminfolog(shade...
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Using DTMF with WebRTC - Web APIs
instead, they're sent out-of-band, as rtp payloads.
...webrtc currently ignores these payloads; this is because webrtc's dtmf support is primarily intended for use with legacy telephone services that rely on dtmf tones to perform tasks such as: teleconferencing systems menu systems voicemail systems entry of credit card or other payment information passcode entry note: while the dtmf is not sent to the remote peer as audio, browsers may choose to play the corresponding tone to the local user as part of their user experience, since users are typically used to hearing their phone play the tones audibly.
...when you wish to transmit dtmf signals, you first need to decide which track to send them on, since dtmf is sent as a series of out-of-band payloads on the rtcrtpsender responsible for transmitting that track's data to the other peer.
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Advanced techniques: Creating and sequencing audio - Web APIs
we're going to introduce sample loading, envelopes, filters, wavetables, and frequency modulation.
...the techniques we are using are: name of voice technique associated web audio api feature "sweep" oscillator, periodic wave oscillatornode, periodicwave "pulse" multiple oscillators oscillatornode "noise" random noise buffer, biquad filter audiobuffer, audiobuffersourcenode, biquadfilternode "dial up" loading a sound sample to play audiocontext.decodeaudiodata(), audiobuffersourcenode note: this instrument was not created to sound good, it was created to provide demonstration code and represents a very simplified version of such an instrument.
...= math.random() * 2 - 1; } // create a buffer source for our created data let noise = audioctx.createbuffersource(); noise.buffer = buffer; let bandpass = audioctx.createbiquadfilter(); bandpass.type = 'bandpass'; bandpass.frequency.value = bandhz; // connect our graph noise.connect(bandpass).connect(audioctx.destination); noise.start(); } "dial up" — loading a sound sample it's straightforward enough to emulate phone dial (dtmf) sounds, by playing a couple of oscillators together using the methods we've already looked at, however, in this section, we'll load in a sample file instead so we can take a look at what's involved.
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XMLHttpRequest - Web APIs
xmlhttprequest.upload read only is an xmlhttprequestupload, representing the upload process.
... since then, a number of additional event handlers have been implemented in various browsers (onload, onerror, onprogress, etc.).
... load fired when an xmlhttprequest transaction completes successfully.
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Media buffering, seeking, and time ranges - Developer guides
sometimes it's useful to know how much <audio> or <video> has downloaded or is playable without delay — a good example of this is the buffered progress bar of an audio or video player.
... buffered the buffered attribute will tell us which parts of the media has been downloaded.
... it returns a timeranges object, which will tell us which chunks of media have been downloaded.
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HTML attribute: rel - HTML: Hypertext Markup Language
link link link manifest web app manifest link not allowed not allowed modulepreload tells to browser to preemptively fetch the script and store it in the document's module map for later evaluation.
... external resource not allowed not allowed preload specifies that the user agent must preemptively fetch and cache the target resource for current navigation according to the potential destination given by the as attribute (and the priority associated with the corresponding destination).
... modulepreload useful for improved performance, and relevant to the <link> anywhere in the document, setting rel="modulepreload" tells the browser to preemptively fetch the script (and dependencies) and store it in the document's module map for later evaluation.
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<button>: The Button element - HTML: Hypertext Markup Language
autofocus html5 this boolean attribute specifies that the button should have input focus when the page loads.
...unlike other browsers, firefox persists the dynamic disabled state of a <button> across page loads.
... firefox, unlike other browsers, persists the dynamic disabled state of a <button> across page loads.
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HTML documentation index - HTML: Hypertext Markup Language
2 allowing cross-origin use of images and canvas advanced, cors, canvas, html, image, reference, security, storage, data html provides a crossorigin attribute for images that, in combination with an appropriate cors header, allows images defined by the <img> element that are loaded from foreign origins to be used in a <canvas> as if they had been loaded from the current origin.
... 113 manifest cache, application cache the manifest attribute of <html> element specifies a url of a application cache manifest that is downloaded in the early stages of page load.
...once chosen, the files can be uploaded to a server using form submission, or manipulated using javascript code and the file api.
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HTTP conditional requests - HTTP
such requests can be useful to validate the content of a cache, and sparing a useless control, to verify the integrity of a document, like when resuming a download, or when preventing to lose updates when uploading or modifying a document on the server.
... for unsafe methods, like put, which usually uploads a document, the conditional request can be used to upload the document, only if the original it is based on is the same as that stored on the server.
... comparing versions of the same resource is a bit tricky: depending on the context, there are two kinds of equality checks: strong validation is used when byte to byte identity is expected, for example when resuming a download.
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Configuring servers for Ogg media - HTTP
handle http 1.1 byte range requests correctly in order to support seeking and playing back regions of the media that aren't yet downloaded, gecko uses http 1.1 byte-range requests to retrieve the media from the seek target position.
... include regular key frames when the browser seeks through ogg media to a specified time, it has to seek to the nearest key frame before the seek target, then download and decode the video from there until the requested target time.
... consider using the preload attribute the html <audio> and <video> elements provide the preload attribute, which tells the browser to attempt to download the entire media when the page loads.
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import - JavaScript
(async () => { if (somethingistrue) { const { default: mydefault, foo, bar } = await import('/modules/my-module.js'); } })(); dynamic imports the standard import syntax is static and will always result in all code in the imported module being evaluated at load time.
... in situations where you wish to load a module conditionally or on demand, you can use a dynamic import instead.
... the following are some reasons why you might need to use dynamic import: when importing statically significantly slows the loading of your code and there is a low likelihood that you will need the code you are importing, or you will not need it until a later time.
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Authoring MathML - MathML
pros: this is very easy setup: only a few javascript and css files to upload and/or a link to add to your document header.
... the conversion must be done at each page load, may be slow and may conflict with the html parsing (e.g.
...alternatively, you can use the more traditional javascript parsing of expressions at load time as all the other tools in this section do.
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Mobile first - Progressive web apps (PWAs)
then at implementation stage, we present the mobile layout and functionality as the default configuration provided, before additional information is loaded on top of that, whenever appropriate.
...this way, mobile devices don't have to load assets and other information twice.
... if you are using mechanisms like feature detection and matchmedia to conditionally load scripting functionality depending on viewport size, feature support, etc., you should just load the very basics that pretty much all browsers will need first, then progressively enhance browsers higher up the food chain.
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Index - XSLT: Extensible Stylesheet Language Transformations
to find out the current type, load the file in mozilla and look at the page info.
... or use a download tool, those usually tell the mime type.
...the javascript loads the .xsl file only on the first sort and sets the xslloaded variable to true once it has finished loading the file.
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content/worker - Archive of obsolete content
optional options: name type contentscriptfile string,array the local file urls of content scripts to load.
... content scripts specified by this option are loaded before those specified by the contentscript option.
... contentscript string,array the texts of content scripts to load.
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cfx - Archive of obsolete content
called with no options it looks for a file called package.json in the current directory, loads the corresponding add-on, and runs it under the version of firefox it finds in the platform's default install path.
... -o, --overload-modules in early versions of the sdk, the sdk modules used by an add-on were themselves included in the add-on.
...if package.json exists, cfx will load the corresponding add-on, load from the tests directory any modules that start with the word test- and run the unit tests they contain.
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Common Pitfalls - Archive of obsolete content
the first couple of items deal with loading content from a uri.
... it's important to create the uri correctly, and then check that it's secure to load.
... this will shield you from loading <tt>javascript:</tt> or <tt>chrome:</tt> uris when you shouldn't.
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Extension Etiquette - Archive of obsolete content
if the user loads a website and they ask for focus, they should get it.
...you can decrease download size by omitting a customized about box.
... theming if you have xul buttons in your extension that do functions similar to ones that already exist in a browser — for example, a feed reader that reloads and stops — use icons from the browser's theme.
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JavaScript Object Management - Archive of obsolete content
to initialize your chrome objects, it's usually better to run the initialization code from the "load" event handler for the window.
... the load event is fired after the dom on the window has loaded completely, but before it's displayed to the user.
... } // more stuff }; window.addeventlistener( "load", function() { 〈namespace〉.browseroverlay.init(); }, false); there are some things you can't (or shouldn't) do inside load handlers, such as closing the window being loaded, or opening new windows, alerts or dialogs.
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The Essentials of an Extension - Archive of obsolete content
there are also downloadable tools for all platforms that generate them.
...windows like the downloads window are pure chrome.
...open a new firefox tab, type chrome://mozapps/content/downloads/downloads.xul on your location bar and press enter.
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Security best practices in extensions - Archive of obsolete content
web content handling in general the best way to ensure that the browser is not compromised when you load content is to make sure it does not have those privileges.
...for example, if you load a chrome url, this means the content has been registered with firefox and has full access.
...files loaded using the file protocol can access files on the user's disk and other local devices.
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Adding preferences to an extension - Archive of obsolete content
download the sample you can download a copy of this sample to look over, or to use as the basis for your own extension.
... get the code here: download the sample update the manifests the install manifest and chrome manifest need to be updated.
... startup() the stockwatcher.startup() function is called when our extension is first loaded.
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List of Mozilla-Based Applications - Archive of obsolete content
the firefox 55 source code batik java-based toolkit uses mozilla rhino bitbox security focused browser seemingly based on firefox blackbird browser for african american community bluegriffon wysiwyg editor next generation version of composer buzzbird twitter client built on xulrunner camino browser 2.5m downloads and ~400,000 active users ...
... entelechy chat bot uses xulrunner epic browser web browser based on chromium uses mozilla nss and npapi libraries emusic download manager music downloader for emusic emusic remote music manager enlis genome personal genome browser esxx javascript application server uses mozilla rhino etna xml wysiwyg editor eudora mail and news application the upcoming version 8 will be based on thunderbird evergreen library automation ...
... font management tool firecast digital signage and interactive kiosk tools also used in firecast easystart mozilla firefox web browser web browser usage stats from global stats fossamail email client for windows platform, based on mozilla thunderbird developed by moonchild productions, creator of the pale moon web browser flickr uploadr image upload tool see flickr uploadr: open source and powered by xulrunner foxkeh clock clock frizione javascript development, testing and deployment environment uses mozilla rhino geckofx embeddable gecko gjs javascript bindings for gnome globalmojo browser that raises money for your favorite causes gl...
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JavaScript crypto - Archive of obsolete content
<script> function onsmartcardchange() { window.location.reload(); } function register() { window.crypto.enablesmartcardevents = true; document.addeventlistener("smartcard-insert", onsmartcardchange, false); document.addeventlistener("smartcard-remove", onsmartcardchange, false); } function deregister() { document.removeeventlistener("smartcard-insert", onsmartcardchange, false); document.removeeventlistener("smartcard-remove", onsmartcardchange, fa...
...lse); } document.body.onload = register; document.body.onunload = deregister; </script> with the above example, your web site will automatically reload anytime a smartcard is inserted or removed.
... the importusercertificates() function loads certificates into the nss database or smartcard if the corresponding key is found there.
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Running Tamarin performance tests - Archive of obsolete content
you may download the latest asc.jar from ftp://ftp.mozilla.org/pub/js/tamarin...latest/asc.jar.
... also the source to asc.jar may be downloaded and rebuilt from http://opensource.adobe.com/wiki/dis...exsdk/flex+sdk.
...for example you may download or build the latest checked in avmshell to compare against a local change.
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XML in Mozilla - Archive of obsolete content
dtds and other external entities mozilla does not load external entities from the web.
... mozilla can load external entities whose system identifier uses the chrome protocol.
...pointer element() scheme obsolete since gecko 1.9.1 w3c recommendation xpointer xmlns() scheme obsolete since gecko 1.9.1 w3c recommendation xpointer fixptr() scheme obsolete since gecko 1.9.1 this scheme is simply a wrapper for fixptr xpointer xpath1() scheme obsolete since gecko 1.9.1 internet-draft document.load(), document.async part of dom level 3 load & save module, a w3c working draft xhtml we have reasonable xhtml support, most things should work.
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browser.type - Archive of obsolete content
the type of browser, which can be used to set access of the document loaded inside the browser.
... if this is not set, the loaded document has the same access as the window containing the browser.
... more precisely: the document loaded into a chrome window is always of chrome type.
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Building accessible custom components in XUL - Archive of obsolete content
a super-simple spreadsheet download stage-1.zip install stage-1.xpi to build our xul spreadsheet, we'll use three built-in xul controls: a single grid element to contain the other elements and position them in rows and columns.
...further reading grid element reference description element reference label element reference grid tutorial label tutorial adding roles with dhtml accessibility download stage-2.zip install stage-2.xpi using the new dhtml accessibility techniques in firefox 1.5, we can declare the role of each element in our spreadsheet.
...further reading table of supported roles and states in firefox focus issues download stage-3.zip install stage-3.xpi the next step on the road to an accessible spreadsheet is the focus problem.
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Content Panels - Archive of obsolete content
adding child panels there may be times when you want to have part of a document loaded from a different page.
...it has the advantage that it can be placed anywhere and the contents can be loaded from a different file.
...the browser can also load pages with referers and other flags.
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Getting started with XULRunner - Archive of obsolete content
step 1: download xulrunner you can find a download link on the main xulrunner page here on mdn.
... since we are not creating any binary xpcom components, we only need to download and install the xulrunner runtime package, not the sdk.
... the xulrunner download for windows is a zip file, not a true install.
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The Business Benefits of Web Standards - Archive of obsolete content
improved user experience: less bandwidth and fast loads html code is often much more compact (therefore easier to read and maintain) when used in conjunction with css.
...this translates into better user experience, according to usability guru jakob nielsen, who notes that users tend to close a web page when it takes more than 10 seconds to load.
... the style sheet only needs to load once and then it is cached.
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Plug-in Development Overview - Gecko Plugin API Reference
the browser looks up the media type, and if it finds a plug-in registered to that type, loads the plug-in software.
... but when the plug-in is loaded from a well-known directory, a different method must be used.
... in this case to ensure the plug-in file will be loaded, it should have a name in the form of "np*.dll".
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UI pseudo-classes - Learn web development
:checked, :indeterminate, and :default: respectively target checkboxes and radio buttons that are checked, in an indeterminate state (neither checked or not checked), and the default selected option when the page loads (e.g.
... this works quite nicely — when the page first loads, "required" is shown, along with a red cross and border.
... now finally, we've used some javascript to toggle the disabling of the billing address fields: // wait for the page to finish loading document.addeventlistener('domcontentloaded', function () { // attach `change` event listener to checkbox document.getelementbyid('billing-checkbox').addeventlistener('change', togglebilling); }, false); function togglebilling() { // select the billing text fields let billingitems = document.queryselectorall('#billing input[type="text"]'); // select the billing text labels let bi...
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JavaScript basics - Learn web development
is the standard for introductory programming examples.) important: if you haven't been following along with the rest of our course, download this example code and use it as a starting point.
...then load index.html in your browser.
... if the javascript loads first and it is supposed to affect the html that hasn't loaded yet, there could be problems.
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Creating hyperlinks - Learn web development
if the web browser doesn't know how to display or handle the file, it will ask you if you want to open the file (in which case the duty of opening or handling the file is passed to a suitable native app on the device) or download the file (in which case you can try to deal with it later on).
...for example, if an index.html page is uploaded to a directory called projects that sits inside the root of a web server, and the web site's domain is http://www.example.com, the page would be available at http://www.example.com/projects/index.html (or even just http://www.example.com/projects/, as most web servers just look for a landing page such as index.html to load if it isn't specified in the url.) an absolute url will always point to...
... let's look at a specific example: good link text: download firefox <p><a href="https://firefox.com/"> download firefox </a></p> bad link text: click here to download firefox <p><a href="https://firefox.com/"> click here </a> to download firefox</p> other tips: don't repeat the url as part of the link text — urls look ugly, and sound even uglier when a screen reader reads them out letter by letter.
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Adding vector graphics to the Web - Learn web development
the svg file can be cached by the browser, resulting in faster loading times for any page that uses the image loaded in the future.
...this being the case, only supporting browsers will load the svg — older browsers will load the png instead: <img src="equilateral.png" alt="triangle with equal sides" srcset="equilateral.svg"> you can also use svgs as css background images, as shown below.
... in the below code, older browsers will stick with the png that they understand, while newer browsers will load the svg: background: url("fallback.png") no-repeat center; background-image: url("image.svg"); background-size: contain; like the <img> method described above, inserting svgs using css background images means that the svg can't be manipulated with javascript, and is also subject to the same css limitations.
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Introducing asynchronous JavaScript - Learn web development
that means that the following (pseudocode) wouldn't work: let response = fetch('myimage.png'); let blob = response.blob(); // display your image blob in the ui somehow that's because you don't know how long the image will take to download, so when you come to run the second line it will throw an error (possibly intermittently, possibly every time) because the response is not yet available.
...let's look at another example that loads a resource via the xmlhttprequest api (run it live, and see the source): function loadasset(url, type, callback) { let xhr = new xmlhttprequest(); xhr.open('get', url); xhr.responsetype = type; xhr.onload = function() { callback(xhr.response); }; xhr.send(); } function displayimage(blob) { let objecturl = url.createobjecturl(blob); let image = document.createelement('img...
...'); image.src = objecturl; document.body.appendchild(image); } loadasset('coffee.jpg', 'blob', displayimage); here we create a displayimage() function that simply represents a blob passed to it as an object url, then creates an image to display the url in, appending it to the document's <body>.
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Working with JSON - Learn web development
ne wilson", "powers": [ "million tonne punch", "damage resistance", "superhuman reflexes" ] }, { "name": "eternal flame", "age": 1000000, "secretidentity": "unknown", "powers": [ "immortality", "heat immunity", "inferno", "teleportation", "interdimensional travel" ] } ] } if we loaded this object into a javascript program, parsed in a variable called superheroes for example, we could then access the data inside it using the same dot/bracket notation we looked at in the javascript object basics article.
...try loading this up and then accessing data inside the variable via your browser's javascript console.
... we are going to load it into our page, and use some nifty dom manipulation to display it, like this: obtaining the json to obtain the json, we use an api called xmlhttprequest (often called xhr).
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JavaScript performance - Learn web development
previous overview: performance next while images and video account for over 70% of the bytes downloaded for the average website, byte per byte, javascript has a greater negative impact on performance.
...but not all bytes downloaded have the same impact.
... javascript bytes have to be downloaded, parsed, and exectuted.
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Properly configuring server MIME types - Learn web development
examples of mime types are: text/html for normal web pages text/plain for plain text text/css for cascading style sheets text/javascript for scripts application/octet-stream meaning "download this file" application/x-java-applet for java applets application/pdf for pdf documents technical background registered values for mime types are available in iana | mime media types.
... note: historically, firefox has loaded css files even if they had the wrong mime type, as long as the html document that requested them was being processed in quirks mode.
... for security reasons, gecko 2.0 will no longer do this for stylesheets loaded from a different origin than the requesting document.
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Working with Svelte stores - Learn web development
we will also see how to develop our own custom store to persist the todo information to web storage, allowing our todos to persist over page reloads.
... code along with us git clone the github repo (if you haven't already done it) with: git clone https://github.com/opensas/mdn-svelte-tutorial.git then to get to the current app state, run cd mdn-svelte-tutorial/06-stores or directly download the folder's content: npx degit opensas/mdn-svelte-tutorial/06-stores remember to run npm install && npm run dev to start your app in development mode.
... in app.svelte we'll import the component; add the following import statement below the existing one: import alert from './components/alert.svelte' then call the alert component just above the todos call, like this: <alert /> <todos {todos} /> load your test app now, and you should now see the alert message on screen.
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Chrome Worker Modules
the preferred way to define and load modules for chrome workers is to use the chrome worker module loader.
... this module loader should not surprise developers familiar with commonjs, as it implements a minimal commonjs require().
... loading modules loading a module is simple.
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Chrome registration
starting with gecko 2.0, the root chrome.manifest is the only manifest used; you can add manifest commands to that file to load secondary manifests.
... note: scripts (including those found in xbl) loaded from skin packages will not execute.
... manifest manifest subdirectory/foo.manifest [flags] this will load a secondary manifest file.
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Displaying Places information using views
second, know this: when it comes to trees, "view" is an overloaded word.
... applyfilter() loads a new empty query with particular search terms and folders.
... load() sets the queries that the view displays.
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