BaseAudioContext.createConvolver() - Web APIs
the createconvolver() method of the baseaudiocontext interface creates a convolvernode, which is commonly used to apply reverb effects to your audio.
... syntax baseaudiocontext.createconvolver(); returns a convolvernode.
... example the following example shows basic usage of an audiocontext to create a convolver node.
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DOMImplementation.createHTMLDocument() - Web APIs
the domimplementation.createhtmldocument() method creates a new html document.
... syntax const newdoc = document.implementation.createhtmldocument(title) parameters title optional (except in ie) a domstring containing the title to give the new html document.
... example this example creates a new html document and inserts it into an <iframe> in the current document.
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Document.createAttribute() - Web APIs
the document.createattribute() method creates a new attribute node, and returns it.
... the object created a node implementing the attr interface.
... syntax attribute = document.createattribute(name) parameters name is a string containing the name of the attribute.
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Document.createProcessingInstruction() - Web APIs
createprocessinginstruction() generates a new processing instruction node and returns it.
... syntax pinode = document.createprocessinginstruction(target, data) parameters pinode is the resulting processinginstruction node.
... example var doc = new domparser().parsefromstring('<foo />', 'application/xml'); var pi = doc.createprocessinginstruction('xml-stylesheet', 'href="mycss.css" type="text/css"'); doc.insertbefore(pi, doc.firstchild); console.log(new xmlserializer().serializetostring(doc)); // displays: <?xml-stylesheet href="mycss.css" type="text/css"?><foo/> specifications specification status comment domthe definition of 'createprocessinginstruction()' in that specification.
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FileSystemFlags.create - Web APIs
the create property on the filesystemflags dictionary is used to indicate whether or not the file should be created if it's missing.
... syntax filesystemflags.create = booleanvalue values the table below describes the result of each possible combination of these flags depending on whether or not the target file or directory path already exists.
... option values file/directory condition result create exclusive false n/a[1] path exists and matches the desired type (depending on whether the function called is getfile() or getdirectory() the successcallback is called with a filesystemfileentry if getfile() was called or a filesystemdirectoryentry if getdirectory() was called.
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RTCPeerConnection.createDataChannel() - Web APIs
the createdatachannel() method on the rtcpeerconnection interface creates a new channel linked with the remote peer, over which any kind of data may be transmitted.
... syntax datachannel = rtcpeerconnection.createdatachannel(label[, options]); parameters label a human-readable name for the channel.
... negotiated optional by default (false), data channels are negotiated in-band, where one side calls createdatachannel, and the other side listens to the rtcdatachannelevent event using the ondatachannel eventhandler .
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PR_CreatePipe
creates an anonymous pipe and retrieves file descriptors for the read and write ends of the pipe.
... syntax #include <prio.h> prstatus pr_createpipe( prfiledesc **readpipe, prfiledesc **writepipe); parameters the function has the following parameters: readpipe a pointer to a prfiledesc pointer.
... returns the function returns one of these values: if the pipe is successfully created, pr_success.
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PR_CreateThread
creates a new thread.
... syntax #include <prthread.h> prthread* pr_createthread( prthreadtype type, void (*start)(void *arg), void *arg, prthreadpriority priority, prthreadscope scope, prthreadstate state, pruint32 stacksize); parameters pr_createthread has the following parameters: type specifies that the thread is either a user thread (pr_user_thread) or a system thread (pr_system_thread).
... priority the initial priority of the newly created thread.
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JS::CreateError
this article covers features introduced in spidermonkey 38 create an error object.
... syntax // added in spidermonkey 45 bool js::createerror(jscontext *cx, jsexntype type, handleobject stack, handlestring filename, uint32_t linenumber, uint32_t columnnumber, jserrorreport *report, handlestring message, mutablehandlevalue rval); // obsolete since jsapi 39 bool js::createerror(jscontext *cx, jsexntype type, handlestring stack, handlestring filename, uint32_t linenumber, uint32_t columnnumber, jserrorreport *report, handlestring message, mutablehandlevalue rval); name type description cx jscontext * pointer to a js context from which to derive runtime information.
...receives the created error object.
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Components.utils.createObjectIn
components.utils.createobjectin creates a new javascript object in the scope of the specified object's compartment.
... note that this function is now mostly obsolete when you are using sandbox, because you can create an object in a different compartment using new.
... for example, to create a new object in the compartment identified by contentwindow: var newobject = new contentwindow.object(); but it is really needeed from firefox 30 onwards when trying to manipulate the dom window.
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AudioContext.createMediaElementSource() - Web APIs
the createmediaelementsource() method of the audiocontext interface is used to create a new mediaelementaudiosourcenode object, given an existing html <audio> or <video> element, the audio from which can then be played and manipulated.
... syntax var audioctx = new audiocontext(); var source = audioctx.createmediaelementsource(mymediaelement); parameters mymediaelement an htmlmediaelement object that you want to feed into an audio processing graph to manipulate.
... example this simple example creates a source from an <audio> element using createmediaelementsource(), then passes the audio through a gainnode before feeding it into the audiodestinationnode for playback.
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BaseAudioContext.createBufferSource() - Web APIs
the createbuffersource() method of the baseaudiocontext interface is used to create a new audiobuffersourcenode, which can be used to play audio data contained within an audiobuffer object.
... audiobuffers are created using baseaudiocontext.createbuffer or returned by baseaudiocontext.decodeaudiodata when it successfully decodes an audio track.
... syntax var source = baseaudiocontext.createbuffersource(); returns an audiobuffersourcenode.
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BaseAudioContext.createDelay() - Web APIs
the createdelay() method of the baseaudiocontext interface is used to create a delaynode, which is used to delay the incoming audio signal by a certain amount of time.
... syntax var delaynode = audioctx.createdelay(maxdelaytime); parameters maxdelaytime optional the maximum amount of time, in seconds, that the audio signal can be delayed by.
... example we have created a simple example that allows you to play three different samples on a constant loop — see create-delay (you can also view the source code).
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BaseAudioContext.createPeriodicWave() - Web APIs
the createperiodicwave() method of the baseaudiocontext interface is used to create a periodicwave, which is used to define a periodic waveform that can be used to shape the output of an oscillatornode.
... syntax var wave = audiocontext.createperiodicwave(real, imag[, constraints]); returns a periodicwave.
... example the following example illustrates simple usage of createperiodicwave(), to create a periodicwave object containing a simple sine wave.
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BaseAudioContext.createWaveShaper() - Web APIs
the createwaveshaper() method of the baseaudiocontext interface creates a waveshapernode, which represents a non-linear distortion.
... syntax baseaudioctx.createwaveshaper(); returns a waveshapernode.
... example the following example shows basic usage of an audiocontext to create a wave shaper node.
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CanvasRenderingContext2D.createImageData() - Web APIs
the canvasrenderingcontext2d.createimagedata() method of the canvas 2d api creates a new, blank imagedata object with the specified dimensions.
... syntax imagedata ctx.createimagedata(width, height); imagedata ctx.createimagedata(imagedata); parameters width the width to give the new imagedata object.
... examples creating a blank imagedata object this snippet creates a blank imagedata object using the createimagedata() method.
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CanvasRenderingContext2D.createRadialGradient() - Web APIs
the canvasrenderingcontext2d.createradialgradient() method of the canvas 2d api creates a radial gradient using the size and coordinates of two circles.
... syntax canvasgradient ctx.createradialgradient(x0, y0, r0, x1, y1, r1); the createradialgradient() method is specified by six parameters, three defining the gradient's start circle, and three defining the end circle.
... examples filling a rectangle with a radial gradient this example initializes a radial gradient using the createradialgradient() method.
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Document.createNSResolver() - Web APIs
creates an xpathnsresolver which resolves namespaces with respect to the definitions in scope for a specified node.
... syntax nsresolver = document.creatensresolver(node); parameters node is the node to be used as a context for namespace resolution.
...to match default elements in a non-null namespace, you either have to refer to a particular element using a form such as *namespace-uri()=http://www.w3.org/1999/xhtml and name()=p[@id='_myid'] (this approach works well for dynamic xpath expressions where the namespaces might not be known) or use prefixed name tests, and create a namespace resolver mapping the prefix to the namespace.
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Document.createTreeWalker() - Web APIs
the document.createtreewalker() creator method returns a newly created treewalker object.
... syntax document.createtreewalker(root, whattoshow[, filter[, entityreferenceexpansion]]); parameters root a root node of this treewalker traversal.
... whattoshow optional a unsigned long representing a bitmask created by combining the constant properties of nodefilter.
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FileSystemDirectoryEntry.createReader() - Web APIs
the filesystemdirectoryentry interface's method createreader() returns a filesystemdirectoryreader object which can be used to read the entries in the directory.
... syntax directoryreader = filesystemdirectoryentry.createreader(); parameters none.
... example this example creates a method called readdirectory(), which fetches all of the entries in the specified filesystemdirectoryentry and returns them in an array.
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FileSystemFileEntry.createWriter() - Web APIs
the filesystemfileentry interface's method createwriter() returns a filewriter object which can be used to write data into the file represented by the directory entry.
... syntax filesystemfileentry.createwriter(successcallback[, errorcallback]); parameters successcallback a callback function which is called when the filewriter has been created successfully; the filewriter is passed into the callback as the only parameter.
... errorcallback optional if provided, this must be a method which is caled when an error occurs while trying to create the filewriter.
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HTMLTableElement.createCaption() - Web APIs
the htmltableelement.createcaption() method returns the <caption> element associated with a given <table>.
... if no <caption> element exists on the table, this method creates it, and then returns it.
... note: if no caption exists, createcaption() inserts a new caption directly into the table.
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dirCreate - Archive of obsolete content
dircreate creates a new directory.
... method of file object syntax int dircreate( filespecobject dirtocreate ); parameters the dircreate method has the following parameters: dirtocreate a filespecobject representing the pathname of the directory to create.
...description the input parameter is a filespecobject that you have already created with the install object's getfolder method.
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FC_CreateObject
name fc_createobject - create a new object.
... syntax ck_rv fc_createobject( ck_session_handle hsession, ck_attribute_ptr ptemplate, ck_ulong ulcount, ck_object_handle_ptr phobject ); parameters hsession [in] session handle.
... description fc_createobject creates an object using the attributes specified in the template.
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AudioContext.createMediaStreamSource() - Web APIs
the createmediastreamsource() method of the audiocontext interface is used to create a new mediastreamaudiosourcenode object, given a media stream (say, from a mediadevices.getusermedia instance), the audio from which can then be played and manipulated.
... syntax audiosourcenode = audiocontext.createmediastreamsource(stream); parameters stream a mediastream to serve as an audio source to be fed into an audio processing graph for use and manipulation.
...maudiosourcenode // also output the visuals into a video element if (navigator.mediadevices) { console.log('getusermedia supported.'); navigator.mediadevices.getusermedia ({audio: true, video: true}) .then(function(stream) { video.srcobject = stream; video.onloadedmetadata = function(e) { video.play(); video.muted = true; }; // create a mediastreamaudiosourcenode // feed the htmlmediaelement into it var audioctx = new audiocontext(); var source = audioctx.createmediastreamsource(stream); // create a biquadfilter var biquadfilter = audioctx.createbiquadfilter(); biquadfilter.type = "lowshelf"; biquadfilter.frequency.value = 1000; biquadfilter.gain.value = range.va...
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BaseAudioContext.createAnalyser() - Web APIs
the createanalyser() method of the baseaudiocontext interface creates an analysernode, which can be used to expose audio time and frequency data and create data visualisations.
... syntax var analysernode = baseaudiocontext.createanalyser(); returns an analysernode.
... example the following example shows basic usage of an audiocontext to create an analyser node, then use requestanimationframe() to collect time domain data repeatedly and draw an "oscilloscope style" output of the current audio input.
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BaseAudioContext.createBiquadFilter() - Web APIs
the createbiquadfilter() method of the baseaudiocontext interface creates a biquadfilternode, which represents a second order filter configurable as several different common filter types.
... syntax baseaudiocontext.createbiquadfilter(); returns a biquadfilternode.
... example the following example shows basic usage of an audiocontext to create a biquad filter node.
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BaseAudioContext.createChannelMerger() - Web APIs
the createchannelmerger() method of the baseaudiocontext interface creates a channelmergernode, which combines channels from multiple audio streams into a single audio stream.
... syntax baseaudiocontext.createchannelmerger(numberofinputs); parameters numberofinputs the number of channels in the input audio streams, which the output stream will contain; the default is 6 if this parameter is not specified.
... var ac = new audiocontext(); ac.decodeaudiodata(somestereobuffer, function(data) { var source = ac.createbuffersource(); source.buffer = data; var splitter = ac.createchannelsplitter(2); source.connect(splitter); var merger = ac.createchannelmerger(2); // reduce the volume of the left channel only var gainnode = ac.creategain(); gainnode.gain.setvalueattime(0.5, ac.currenttime); splitter.connect(gainnode, 0); // connect the splitter back to the second input of the merger: we // effectivel...
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BaseAudioContext.createChannelSplitter() - Web APIs
the createchannelsplitter() method of the baseaudiocontext interface is used to create a channelsplitternode, which is used to access the individual channels of an audio stream and process them separately.
... syntax baseaudiocontext.createchannelsplitter(numberofoutputs); parameters numberofoutputs the number of channels in the input audio stream that you want to output separately; the default is 6 if this parameter is not specified.
... var ac = new audiocontext(); ac.decodeaudiodata(somestereobuffer, function(data) { var source = ac.createbuffersource(); source.buffer = data; var splitter = ac.createchannelsplitter(2); source.connect(splitter); var merger = ac.createchannelmerger(2); // reduce the volume of the left channel only var gainnode = ac.creategain(); gainnode.gain.setvalueattime(0.5, ac.currenttime); splitter.connect(gainnode, 0); // connect the splitter back to the second input of the merger: we // effectivel...
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BaseAudioContext.createDynamicsCompressor() - Web APIs
the createdynamicscompressor() method of the baseaudiocontext interface is used to create a dynamicscompressornode, which can be used to apply compression to an audio signal.
... syntax baseaudioctx.createdynamicscompressor(); returns a dynamicscompressornode.
... example the below code demonstrates a simple usage of createdynamicscompressor() to add compression to an audio track.
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BaseAudioContext.createGain() - Web APIs
the creategain() method of the baseaudiocontext interface creates a gainnode, which can be used to control the overall gain (or volume) of the audio graph.
... syntax var gainnode = audiocontext.creategain(); return value a gainnode which takes as input one or more audio sources and outputs audio whose volume has been adjusted in gain (volume) to a level specified by the node's gainnode.gain a-rate parameter.
... example the following example shows basic usage of an audiocontext to create a gainnode, which is then used to mute and unmute the audio when a mute button is clicked by changing the gain property value.
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BaseAudioContext.createPanner() - Web APIs
the createpanner() method of the baseaudiocontext interface is used to create a new pannernode, which is used to spatialize an incoming audio stream in 3d space.
... syntax baseaudioctx.createpanner(); returns a pannernode.
... example in the following example, you can see an example of how the createpanner() method, audiolistener and pannernode would be used to control audio spatialisation.
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BaseAudioContext.createStereoPanner() - Web APIs
the createstereopanner() method of the baseaudiocontext interface creates a stereopannernode, which can be used to apply stereo panning to an audio source.
... syntax baseaudiocontext.createstereopanner(); returns a stereopannernode.
...in the javascript we create a mediaelementaudiosourcenode and a stereopannernode, and connect the two together using the connect() method.
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CanvasRenderingContext2D.createLinearGradient() - Web APIs
the canvasrenderingcontext2d.createlineargradient() method of the canvas 2d api creates a gradient along the line connecting two given coordinates.
... syntax canvasgradient ctx.createlineargradient(x0, y0, x1, y1); the createlineargradient() method is specified by four parameters defining the start and end points of the gradient line.
... examples filling a rectangle with a linear gradient this example initializes a linear gradient using the createlineargradient() method.
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DOMImplementation.createDocumentType() - Web APIs
the domimplementation.createdocumenttype() method returns a documenttype object which can either be used with domimplementation.createdocument upon document creation or can be put into the document via methods like node.insertbefore() or node.replacechild().
... syntax var doctype = document.implementation.createdocumenttype(qualifiednamestr, publicid, systemid); parameters qualifiednamestr is a domstring containing the qualified name, like svg:svg.
... example var dt = document.implementation.createdocumenttype('svg:svg', '-//w3c//dtd svg 1.1//en', 'http://www.w3.org/graphics/svg/1.1/dtd/svg11.dtd'); var d = document.implementation.createdocument('http://www.w3.org/2000/svg', 'svg:svg', dt); alert(d.doctype.publicid); // -//w3c//dtd svg 1.1//en specifications specification status comment domthe definition of 'domimplementation.createdocumenttype' in that specification.
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Document.createCDATASection() - Web APIs
createcdatasection() creates a new cdata section node, and returns it.
... syntax var cdatasectionnode = document.createcdatasection(data); cdatasectionnode is a cdata section node.
... example var docu = new domparser().parsefromstring('<xml></xml>', 'application/xml') var cdata = docu.createcdatasection('some <cdata> data & then some'); docu.getelementsbytagname('xml')[0].appendchild(cdata); alert(new xmlserializer().serializetostring(docu)); // displays: <xml><![cdata[some <cdata> data & then some]]></xml> notes this will only work with xml, not html documents (as html documents do not support cdata sections); attempting it on an html document will throw not_supported_err.
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Document.createDocumentFragment() - Web APIs
creates a new empty documentfragment into which dom nodes can be added to build an offscreen dom tree.
... syntax var fragment = document.createdocumentfragment(); value a newly created, empty, documentfragment object, which is ready to have nodes inserted into it.
...the usual use case is to create the document fragment, append elements to the document fragment and then append the document fragment to the dom tree.
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Document.createNodeIterator() - Web APIs
syntax const nodeiterator = document.createnodeiterator(root[, whattoshow[, filter]]); values root the root node at which to begin the nodeiterator's traversal.
... whattoshow optional is an optional unsigned long representing a bitmask created by combining the constant properties of nodefilter.
...since such nodes were never created in browsers, this paramater had no effect.
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Document.createTouch() - Web APIs
the document.createtouch() method creates and returns a new touch object.
... syntax var touch = documenttouch.createtouch(view, target, identifier, pagex, pagey, screenx, screeny); parameters note: all parameters are optional.
... example this example illustrates using the document.createtouch() method to create touch objects.
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Document.createTouchList() - Web APIs
the document.createtouchlist() method creates and returns a new touchlist object.
... syntax var list = documenttouch.createtouchlist([touch1 [, touch2 [, ...]]]); parameters touches zero or more touch objects.
... example this example illustrates using the document.createtouchlist() method to create touchlist objects.
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HTMLTableElement.createTFoot() - Web APIs
the htmltableelement.createtfoot() method returns the <tfoot> element associated with a given <table>.
... if no footer exists in the table, this methods creates it, and then returns it.
... note: if no footer exists, createtfoot() inserts a new footer directly into the table.
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HTMLTableElement.createTHead() - Web APIs
the htmltableelement.createthead() method returns the <thead> element associated with a given <table>.
... if no header exists in the table, this method creates it, and then returns it.
... note: if no header exists, createthead() inserts a new header directly into the table.
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WebGLRenderingContext.createProgram() - Web APIs
the webglrenderingcontext.createprogram() method of the webgl api creates and initializes a webglprogram object.
... syntax webglprogram gl.createprogram(); parameters none.
... examples creating a webgl program var program = gl.createprogram(); // attach pre-existing shaders gl.attachshader(program, vertexshader); gl.attachshader(program, fragmentshader); gl.linkprogram(program); if ( !gl.getprogramparameter( program, gl.link_status) ) { var info = gl.getprograminfolog(program); throw 'could not compile webgl program.
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createKey - Archive of obsolete content
createkey adds a key to the registry.
... method of winreg object syntax int createkey ( string subkey, string classname); parameters the method has the following parameters: subkey the key path to the appropriate location in the key hierarchy, such as "software\\netscape\\navigator\\mail".
...for information on this parameter, see the description of regcreatekeyex in your windows api documentation.
...description the createkey method adds a key to the registry.

AudioContext.createJavaScriptNode() - Web APIs
the audiocontext.createjavascriptnode() method creates a javascriptnode which is used for directly manipulating audio data with javascript.
... important: this method is obsolete, and has been renamed to audiocontext.createscriptprocessor().
... syntax var jsnode = audioctx.createjavascriptnode(buffersize, numinputchannels, numoutputchannels); parameters buffersize the buffer size must be in units of sample frames, i.e., one of: 256, 512, 1024, 2048, 4096, 8192, or 16384.
... example the following script illustrates the use of createjavascriptnode(): var sinewave = function(context) { var that = this; this.x = 0; // initial sample number this.context = context; this.node = context.createjavascriptnode(1024, 1, 1); this.node.onaudioprocess = function(e) { that.process(e) }; } sinewave.prototype.process = function(e) { var data = e.outputbuffer.getchanneldata(0); for (var i = 0; i < data.length; ++i) { data[i] = math.sin(this.x++); } } sinewave.prototype.play = fu...

BaseAudioContext.createConstantSource() - Web APIs
the createconstantsource() property of the baseaudiocontext interface creates a constantsourcenode object, which is an audio source that continuously outputs a monaural (one-channel) sound signal whose samples all have the same value.
... syntax var constantsourcenode = audiocontext.createconstantsource() parameters none.
... specifications specification status comment web audio apithe definition of 'createconstantsource()' in that specification.
... desktopmobilechromeedgefirefoxinternet exploreroperasafariandroid webviewchrome for androidfirefox for androidopera for androidsafari on iossamsung internetcreateconstantsourcechrome full support 56edge full support ≤79firefox full support 53ie no support noopera full support 43safari no support ...

BaseAudioContext.createOscillator() - Web APIs
the createoscillator() method of the baseaudiocontext interface creates an oscillatornode, a source representing a periodic waveform.
... syntax var oscillatornode = audioctx.createoscillator(); returns an oscillatornode.
... example the following example shows basic usage of an audiocontext to create an oscillator node.
... // create web audio api context var audioctx = new (window.audiocontext || window.webkitaudiocontext)(); // create oscillator node var oscillator = audioctx.createoscillator(); oscillator.type = 'square'; oscillator.frequency.setvalueattime(3000, audioctx.currenttime); // value in hertz oscillator.connect(audioctx.destination); oscillator.start(); specifications specification status comment web audio apithe definition of 'createoscillator' in that specification.

BaseAudioContext.createScriptProcessor() - Web APIs
the createscriptprocessor() method of the baseaudiocontext interface creates a scriptprocessornode used for direct audio processing.
... syntax var scriptprocessor = audioctx.createscriptprocessor(buffersize, numberofinputchannels, numberofoutputchannels); parameters buffersize the buffer size in units of sample-frames.
... note: for a full working example, see our script-processor-node github repo (also view the source code.) var myscript = document.queryselector('script'); var mypre = document.queryselector('pre'); var playbutton = document.queryselector('button'); // create audiocontext and buffer source var audioctx = new audiocontext(); source = audioctx.createbuffersource(); // create a scriptprocessornode with a buffersize of 4096 and a single input and output channel var scriptnode = audioctx.createscriptprocessor(4096, 1, 1); console.log(scriptnode.buffersize); // load in an audio track via xhr and decodeaudiodata function getdata() { request = new xmlhtt...
...click = function() { source.connect(scriptnode); scriptnode.connect(audioctx.destination); source.start(); } // when the buffer source stops playing, disconnect everything source.onended = function() { source.disconnect(scriptnode); scriptnode.disconnect(audioctx.destination); } specifications specification status comment web audio apithe definition of 'createscriptprocessor' in that specification.

Document.createRange() - Web APIs
the document.createrange() method returns a new range object.
... syntax range = document.createrange(); range is the created range object.
... example let range = document.createrange(); range.setstart(startnode, startoffset); range.setend(endnode, endoffset); notes once a range is created, you need to set its boundary points before you can make use of most of its methods.
... specifications specification status comment domthe definition of 'document.createrange' in that specification.

Document.createTextNode() - Web APIs
creates a new text node.
... syntax var text = document.createtextnode(data); text is a text node.
... example <!doctype html> <html lang="en"> <head> <title>createtextnode example</title> <script> function addtextnode(text) { var newtext = document.createtextnode(text), p1 = document.getelementbyid("p1"); p1.appendchild(newtext); } </script> </head> <body> <button onclick="addtextnode('yes!
...');">we can!</button> <hr /> <p id="p1">first line of paragraph.</p> </body> </html> specifications specification status comment domthe definition of 'document: createtextnode' in that specification.

How to create a DOM tree - Web APIs
this page describes how to use the dom core api in javascript to create and modify dom objects.
...n" state="ma" country="usa"/> </person> <person first-name="jed" last-name="brown"> <address street="321 north st" city="atlanta" state="ga" country="usa"/> <address street="123 west st" city="seattle" state="wa" country="usa"/> <address street="321 south avenue" city="denver" state="co" country="usa"/> </person> </people> the w3c dom api, supported by mozilla, can be used to create an in-memory representation of this document like so: var doc = document.implementation.createdocument("", "", null); var peopleelem = doc.createelement("people"); var personelem1 = doc.createelement("person"); personelem1.setattribute("first-name", "eric"); personelem1.setattribute("middle-initial", "h"); personelem1.setattribute("last-name", "jung"); var addresselem1 = doc.createelement("add...
...ress"); addresselem1.setattribute("street", "321 south st"); addresselem1.setattribute("city", "denver"); addresselem1.setattribute("state", "co"); addresselem1.setattribute("country", "usa"); personelem1.appendchild(addresselem1); var addresselem2 = doc.createelement("address"); addresselem2.setattribute("street", "123 main st"); addresselem2.setattribute("city", "arlington"); addresselem2.setattribute("state", "ma"); addresselem2.setattribute("country", "usa"); personelem1.appendchild(addresselem2); var personelem2 = doc.createelement("person"); personelem2.setattribute("first-name", "jed"); personelem2.setattribute("last-name", "brown"); var addresselem3 = doc.createelement("address"); addresselem3.setattribute("street", "321 north st"); addresselem3.setattribute("city", "atlanta"); addres...
...selem3.setattribute("state", "ga"); addresselem3.setattribute("country", "usa"); personelem2.appendchild(addresselem3); var addresselem4 = doc.createelement("address"); addresselem4.setattribute("street", "123 west st"); addresselem4.setattribute("city", "seattle"); addresselem4.setattribute("state", "wa"); addresselem4.setattribute("country", "usa"); personelem2.appendchild(addresselem4); var addresselem5 = doc.createelement("address"); addresselem5.setattribute("street", "321 south avenue"); addresselem5.setattribute("city", "denver"); addresselem5.setattribute("state", "co"); addresselem5.setattribute("country", "usa"); personelem2.appendchild(addresselem5); peopleelem.appendchild(personelem1); peopleelem.appendchild(personelem2); doc.appendchild(peopleelem); see also the dom chapter of...

Element.createShadowRoot() - Web APIs
use element.createshadowroot to create an instance of shadow dom.
... when shadow dom is created, it is always attached to an existing element.
... after the shadow dom is created, the element that it is attached to is called the shadow root.
... syntax var shadowroot = element.createshadowroot(); parameters no parameters.

WebGL2RenderingContext.createVertexArray() - Web APIs
the webgl2renderingcontext.createvertexarray() method of the webgl 2 api creates and initializes a webglvertexarrayobject object that represents a vertex array object (vao) pointing to vertex array data and which provides names for different sets of vertex data.
... syntax webglvertexarrayobject gl.createvertexarray(); parameters none.
... examples var vao = gl.createvertexarray(); gl.bindvertexarray(vao); // ...
... specifications specification status comment webgl 2.0the definition of 'createvertexarray' in that specification.

WebGLRenderingContext.createShader() - Web APIs
the webglrenderingcontext method createshader() of the webgl api creates a webglshader that can then be configured further using webglrenderingcontext.shadersource() and webglrenderingcontext.compileshader().
... syntax webglshader gl.createshader(type); parameters type either gl.vertex_shader or gl.fragment_shader examples see webglshader for usage and examples.
... specifications specification status comment webgl 1.0the definition of 'createshader' in that specification.
... opengl es 2.0the definition of 'glcreateshader' in that specification.

self.createImageBitmap() - Web APIs
the createimagebitmap() method creates a bitmap from a given source, optionally cropped to contain only a portion of that source.
... syntax const imagebitmappromise = createimagebitmap(image[, options]); const imagebitmappromise = createimagebitmap(image, sx, sy, sw, sh[, options]); parameters image an image source, which can be an <img>, svg <image>, <video>, <canvas>, htmlimageelement, svgimageelement, htmlvideoelement, htmlcanvaselement, blob, imagedata, imagebitmap, or offscreencanvas object.
... var canvas = document.getelementbyid('mycanvas'), ctx = canvas.getcontext('2d'), image = new image(); // wait for the sprite sheet to load image.onload = function() { promise.all([ // cut out two sprites from the sprite sheet createimagebitmap(image, 0, 0, 32, 32), createimagebitmap(image, 32, 0, 32, 32) ]).then(function(sprites) { // draw each sprite onto the canvas ctx.drawimage(sprites[0], 0, 0); ctx.drawimage(sprites[1], 32, 32); }); } // load the sprite sheet from an image file image.src = 'sprites.png'; specifications specification status comment html living standardthe d...
...efinition of 'createimagebitmap' in that specification.

NPN_CreateObject - Archive of obsolete content
syntax #include <npruntime.h> npobject *npn_createobject(npp npp, npclass *aclass); parameters the function has the following parameters: <tt>npp</tt> the npp indicating which plugin wants to instantiate the object.
... description if the given npclass provides an allocate function it is used to allocate the storage for the object and the npp argument passed to npn_createobject() is passed along to that function.
...the newly created npobject's reference count is initialized to 1 before it is returned.

PR_CreateFileMap
creates a file mapping object.
... syntax #include <prio.h> prfilemap* pr_createfilemap( prfiledesc *fd, print64 size, prfilemapprotect prot); parameters the function has the following parameters: fd a pointer to a prfiledesc object representing the file that is to be mapped to memory.
... description the prfilemapprotect enumeration used in the prot parameter is defined as follows: typedef enum prfilemapprotect { pr_prot_readonly, pr_prot_readwrite, pr_prot_writecopy } prfilemapprotect; pr_createfilemap only prepares for the mapping a file to memory.

PR_CreateIOLayerStub
creates a new layer.
... syntax #include <prio.h> prfiledesc* pr_createiolayerstub( prdescidentity ident priomethods const *methods); parameters the function has the following parameters: ident the identity to be associated with the new layer.
... description a new layer may be allocated by calling pr_createiolayerstub.

PR_CreateThreadPool
create a new hash table.
... syntax #include <prtpool.h> nspr_api(prthreadpool *) pr_createthreadpool( print32 initial_threads, print32 max_threads, pruint32 stacksize ); parameters the function has the following parameters: initial_threads the number of threads to be created within this thread pool.
... max_threads the limit on the number of threads that will be created to server the thread pool.

BaseAudioContext.createIIRFilter() - Web APIs
the createiirfilter() method of the baseaudiocontext interface creates an iirfilternode, which represents a general infinite impulse response (iir) filter which can be configured to serve as various types of filter.
... syntax var iirfilter = audiocontext.createiirfilter(feedforward, feedback); parameters feedforward an array of floating-point values specifying the feedforward (numerator) coefficients for the transfer function of the iir filter.
... specifications specification status comment web audio apithe definition of 'createiirfilter()' in that specification.

Document.createComment() - Web APIs
createcomment() creates a new comment node, and returns it.
... syntax commentnode = document.createcomment(data); parameters data a string containing the data to be added to the comment.
... example var docu = new domparser().parsefromstring('<xml></xml>', 'application/xml'); var comment = docu.createcomment('this is a not-so-secret comment in your document'); docu.getelementsbytagname('xml')[0].appendchild(comment); alert(new xmlserializer().serializetostring(docu)); // displays: <xml><!--this is a not-so-secret comment in your document--></xml> specifications specification status comment domthe definition of 'document.createcomment' in that specification.

EXT_disjoint_timer_query.createQueryEXT() - Web APIs
the ext_disjoint_timer_query.createqueryext() method of the webgl api creates and initializes webglquery objects, which track the time needed to fully complete a set of gl commands.
... syntax webgltimerqueryext ext.createqueryext(); parameters none.
... examples var ext = gl.getextension('ext_disjoint_timer_query'); var query = ext.createqueryext(); specifications specification status comment ext_disjoint_timer_querythe definition of 'ext_disjoint_timer_query' in that specification.

OES_vertex_array_object.createVertexArrayOES() - Web APIs
the oes_vertex_array_object.createvertexarrayoes() method of the webgl api creates and initializes a webglvertexarrayobject object that represents a vertex array object (vao) pointing to vertex array data and which provides names for different sets of vertex data.
... syntax webglvertexarrayobjectoes ext.createvertexarrayoes(); parameters none.
... examples var ext = gl.getextension('oes_vertex_array_object'); var vao = ext.createvertexarrayoes(); ext.bindvertexarrayoes(vao); // ...

Range.createContextualFragment() - Web APIs
the range.createcontextualfragment() method returns a documentfragment by invoking the html fragment parsing algorithm or the xml fragment parsing algorithm with the start of the range (the parent of the selected node) as the context node.
... syntax documentfragment = range.createcontextualfragment(tagstring) parameters tagstring text that contains text and tags to be converted to a document fragment.
... example var tagstring = "<div>i am a div node</div>"; var range = document.createrange(); // make the parent of the first div in the document becomes the context node range.selectnode(document.getelementsbytagname("div").item(0)); var documentfragment = range.createcontextualfragment(tagstring); document.body.appendchild(documentfragment); specification specification status comment dom parsing and serializationthe definition of 'range.createcontextualfragment()' in that specification.

WebGL2RenderingContext.createQuery() - Web APIs
the webgl2renderingcontext.createquery() method of the webgl 2 api creates and initializes webglquery objects, which provide ways to asynchronously query for information.
... syntax webglquery gl.createquery(); parameters none.
... var query = gl.createquery(); specifications specification status comment webgl 2.0the definition of 'createquery' in that specification.

WebGL2RenderingContext.createSampler() - Web APIs
the webgl2renderingcontext.createsampler() method of the webgl 2 api creates and initializes webglsampler objects.
... syntax webglsampler gl.createsampler(); parameters none.
... var sampler = gl.createsampler(); specifications specification status comment webgl 2.0the definition of 'createsampler' in that specification.

WebGL2RenderingContext.createTransformFeedback() - Web APIs
the webgl2renderingcontext.createtransformfeedback() method of the webgl 2 api creates and initializes webgltransformfeedback objects.
... syntax webgltransformfeedback gl.createtransformfeedback(); parameters none.
... var transformfeedback = gl.createtransformfeedback(); specifications specification status comment webgl 2.0the definition of 'createtransformfeedback' in that specification.

WebGLRenderingContext.createBuffer() - Web APIs
the webglrenderingcontext.createbuffer() method of the webgl api creates and initializes a webglbuffer storing data such as vertices or colors.
... syntax webglbuffer gl.createbuffer(); parameters none.
... examples creating a buffer var canvas = document.getelementbyid('canvas'); var gl = canvas.getcontext('webgl'); var buffer = gl.createbuffer(); specifications specification status comment webgl 1.0the definition of 'createbuffer' in that specification.

WebGLRenderingContext.createFramebuffer() - Web APIs
the webglrenderingcontext.createframebuffer() method of the webgl api creates and initializes a webglframebuffer object.
... syntax webglframebuffer gl.createframebuffer(); parameters none.
... examples creating a frame buffer var canvas = document.getelementbyid('canvas'); var gl = canvas.getcontext('webgl'); var framebuffer = gl.createframebuffer(); specifications specification status comment webgl 1.0the definition of 'createframebuffer' in that specification.

WebGLRenderingContext.createRenderbuffer() - Web APIs
the webglrenderingcontext.createrenderbuffer() method of the webgl api creates and initializes a webglrenderbuffer object.
... syntax webglrenderbuffer gl.createrenderbuffer(); parameters none.
... examples creating a render buffer var canvas = document.getelementbyid('canvas'); var gl = canvas.getcontext('webgl'); var renderbuffer = gl.createrenderbuffer(); specifications specification status comment webgl 1.0the definition of 'createrenderbuffer' in that specification.

WebGLRenderingContext.createTexture() - Web APIs
the webglrenderingcontext.createtexture() method of the webgl api creates and initializes a webgltexture object.
... syntax webgltexture gl.createtexture(); parameters none.
... creating a texture var canvas = document.getelementbyid('canvas'); var gl = canvas.getcontext('webgl'); var texture = gl.createtexture(); specifications specification status comment webgl 1.0the definition of 'createtexture' in that specification.

201 Created - HTTP
the http 201 created success status response code indicates that the request has succeeded and has led to the creation of a resource.
... the new resource is effectively created before this response is sent back and the new resource is returned in the body of the message, its location being either the url of the request, or the content of the location header.
... status 201 created specifications specification title rfc 7231, section 6.3.2: 201 created hypertext transfer protocol (http/1.1): semantics and content ...

Create the Canvas and draw on it - Game development
before we can start writing the game's functionality, we need to create a basic structure to render the game inside.
...using your favourite text editor, create a new html document, save it as index.html, in a sensible location, and add the following code to it: <!doctype html> <html> <head> <meta charset="utf-8" /> <title>gamedev canvas workshop</title> <style> * { padding: 0; margin: 0; } canvas { background: #eee; display: block; margin: 0 auto; } </style> </head> <body> <canvas id="mycanvas" width="480" height="320"></canvas> <script> // javascript code goes here </script> </body> </html> we have a charset defined, <title> and some basic css in the header.

CredentialsContainer.create() - Web APIs
the create() method of the credentialscontainer interface returns a promise that resolves with a new credential instance based on the provided options, or null if no credential object can be created.
... syntax var promise = credentialscontainer.create([options]) parameters options an object of type credentialcreationoptions that contains options for the requested new credentials object.

Document.createEntityReference() - Web APIs
the only workaround is to create a text node, cdata section, attribute node value, etc.
... specifications createentityreference ...

createMediaKeys() - Web APIs
the mediakeysystemaccess.createmediakeys() method returns a promise that resolves to a new mediakeys object.
... syntax var mediakeys = await mediakeysystemaccess.createmediakeys(); specifications specification status comment encrypted media extensionsthe definition of 'createmediakeys()' in that specification.

createSession() - Web APIs
the mediakeys.createsession() method returns a new mediakeysession object, which represents a context for message exchange with a content decryption module (cdm).
... syntax ​var mediakeysessionobject = mediakeys.createsession([mediakeysessiontype]); specifications specification status comment encrypted media extensionsthe definition of 'createsession()' in that specification.

XPathEvaluator.createExpression() - Web APIs
syntax xpathexpression xpathevaluator.createexpression(expression, resolver); parameters expression a domstring representing representing the xpath expression to be created.
... html <div>xpath example</div> <div>number of &lt;div&gt;s: <output></output></div> javascript var xpath = "//div"; var evaluator = new xpathevaluator(); var expression = evaluator.createexpression("//div"); var result = expression.evaluate(document, xpathresult.ordered_node_snapshot_type); document.queryselector("output").textcontent = result.snapshotlength; result specifications specification status comment document object model (dom) level 3 xpath specificationthe definition of 'xpathevaluator.createexpression()' in that specification.

XPathEvaluator.createNSResolver() - Web APIs
syntax xpathnsresolver xpathevaluator.creatensresolver(noderesolver); parameters noderesolver a node to be used as a context for namespace resolution.
... specifications specification status comment document object model (dom) level 3 xpath specificationthe definition of 'xpathevaluator.creatensresolver()' in that specification.

Create Your Own Firefox Background Theme - Archive of obsolete content
how to create your own background theme themes are made up of a "header" graphic image file, which skins the default firefox ui background.

createInstanceByContractID
this content is now available at nsicomponentmanager.createinstancebycontractid().

createInstance
this content is now available at nsifactory.createinstance().

create
this content is now available at nsifile.create().

createUnique
this content is now available at nsifile.createunique().

AudioContext.createWaveTable() - Web APIs
the audiocontext method createwavetable() is now obsolete; you should instead use the method createperiodicwave().

Document.createExpression() - Web APIs
syntax xpathexpr = document.createexpression(xpathtext, namespaceurlmapper); parameters xpathtext is a string which is the xpath expression to be compiled.

Index - Web APIs
7 abortcontroller.abortcontroller() api, abortcontroller, constructor, experimental, fetch, reference the abortcontroller() constructor creates a new abortcontroller object instance.
... 15 absoluteorientationsensor api, absoluteorientationsensor, constructor, generic sensor api, orientation sensor api, reference, sensor, sensor apis, sensors the absoluteorientationsensor constructor creates a new absoluteorientationsensor object which describes the device's physical orientation in relation to the earth's reference coordinate system.
... 25 accelerometer.accelerometer() api, accelerometer, accelerometer api, constructor, generic sensor api, reference, sensor, sensor apis, sensors the accelerometer constructor creates a new accelerometer object which returns the acceleration of the device along all three axes at the time it is read.
...And 434 more matches

Index
since binary components are linked against a single gecko sdk, a dependency to a particular version of gecko is created.
...this can create a difficult situation for extension developers trying to support multiple gecko versions (firefox 2 and 3, for example).
... 8 generating guids add-ons, developing mozilla, developing_mozilla:tools, extensions, tools, xpcom guids are used in mozilla programming for identifying several types of entities, including xpcom interfaces (this type of guids is callled iid), components (cid), and legacy add-ons—like extensions and themes—that were created prior to firefox 1.5.
...And 116 more matches

Index - Archive of obsolete content
41 addon-page add-on sdk, add-ons, extensions, obsolete, reference create a page that does not contain navigational elements.
... 50 page-worker add-on sdk create a permanent, invisible page and access its dom.
... 51 panel add-on sdk, add-ons, extensions creates transient dialogs to implement part of an add-on's user interface.
...And 99 more matches

Index
it will detect and open an existing database, or it can create a new one.
...nss will usually create an in-memory (ram) presentation of certificates, once a certificate has been received from the network, read from disk, or looked up from the database, and prepare in-memory data structures that contain the certificate's properties, as well as providing a handle for the programmer to use.
...the usual approach is to create a certificate signing request (csr) as soon as an application is done with the creation step, which will have created a handle to the key pair, and which can be used for the necessary related operations, like producing a proof-of-ownership of the private key, which is usually required when submitting the public key with a csr to a ca.
...And 67 more matches

Index
30 js::clonefunctionobject jsapi reference, reference, référence(2), spidermonkey js::clonefunctionobject creates a new function object from funobj.
...if scopechain is omitted, it creates a new function object in cx's global.
... this can be helpful if funobj is an extant function that you wish to use as if it were enclosed by a newly-created global object.
...And 58 more matches

Chapter 5: Let's build a Firefox extension - Archive of obsolete content
create a development profile if you want to partition your everyday browsing environment from your development environment in firefox, set up a second profile for development.
... to create this dev profile start firefox with firefox.exe -no-remote -p dev on the first start the profile manager will appear, where you can create the dev profile and configure its home-path.
...some of these preferences do not exist—to create them, right-click, select “new>boolean”, and type in the name and set the value accordingly.
...And 49 more matches

Details of the object model - JavaScript
because of this different basis, it can be less apparent how javascript allows you to create hierarchies of objects and to have inheritance of properties and their values.
... this chapter assumes that you are already somewhat familiar with javascript and that you have used javascript functions to create simple objects.
...any object can specify its own properties, either when you create it or at run time.
...And 42 more matches

Index - Archive of obsolete content
to create an output stream, use nsiscriptableio.newoutputstream().
... this method has a number of options to specify text or binary writing, the character set, and whether to append to an existing file or create a new one.
... 435 how to implement a custom xul query processor component xul supports templating to create a block of content from a datasource query.
...And 41 more matches

Using IndexedDB - Web APIs
because it lets you create web applications with rich query abilities regardless of network availability, your applications can work both online and offline.
... create an object store in the database.
...if the database doesn't already exist, it is created by the open operation, then an onupgradeneeded event is triggered and you create the database schema in the handler for this event.
...And 35 more matches

Advanced techniques: Creating and sequencing audio - Web APIs
each voice also has local controls, which allow you to manipulate the effects or parameters particular to each technique we are using to create those voices.
... "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.
...context as you should be used to by now, each web audio api app starts with an audio context: // for cross browser compatibility const audiocontext = window.audiocontext || window.webkitaudiocontext; const audioctx = new audiocontext(); the "sweep" — oscillators, periodic waves, and envelopes for what we will call the "sweep" sound, that first noise you hear when you dial up, we're going to create an oscillator to generate the sound.
...And 33 more matches

Bytecode Descriptions
objects creating objects newinit stack: ⇒ obj create and push a new object with no properties.
... format: jof_ic newobject, newobjectwithgroup operands: (uint32_t baseobjindex) stack: ⇒ obj create and push a new object of a predetermined shape.
...the spec requires that an objectliteral or arrayliteral creates a new object every time it's evaluated, so this instruction must not be used anywhere it might be executed more than once.
...And 32 more matches

JSAPI User Guide
it can compile and execute scripts, get and set object properties, call javascript functions, convert javascript data from one type to another, create objects, and so on.
...as the script runs, it can create global functions and variables of its own.
... a minimal example each of the three key elements described in the previous section requires a few jsapi calls: the runtime: use js_newruntime to create it and js_destroyruntime to clean it up when you're done.
...And 31 more matches

Index - Learn web development
36 getting started with the web beginner, css, design, guide, html, index, l10n:priority, publishing, theory it's a lot of work to create a professional website, so if you're new to web development, we encourage you to start small.
...most importantly, you should understand what the document object model is, and how to manipulate it to create useful functionality.
...you can even create your own objects to encapsulate related functions and variables into efficient packages and act as handy data containers.
...And 29 more matches

DirectoryEntrySync - Web APIs
basic concepts if you want to create subdirectories, you have to create each child directory in sequence.
... if you try to create a directory using a full path that includes parent directories that do not exist yet, you get an error.
... so create the hierarchy by recursively adding a new path after creating the parent directory.
...And 26 more matches

Client-side storage - Learn web development
we need to create this and write our javascript code into it.
... create an index.js file in the same directory as your html file.
... we'll start off by creating references to all the html features we need to manipulate in this example — we'll create them all as constants, as these references do not need to change in the lifecycle of the app.
...And 25 more matches

Advanced Svelte: Reactivity, lifecycle, accessibility - Learn web development
let's create a component that will be in charge of displaying the buttons and emitting the corresponding events.
... create a new file — components/moreactions.svelte.
...put the following content into your moreactions.svelte file: <script> import { createeventdispatcher } from 'svelte' const dispatch = createeventdispatcher() let completed = true const checkall = () => { dispatch('checkall', completed) completed = !completed } const removecompleted = () => dispatch('removecompleted') </script> <div class="btn-group"> <button type="button" class="btn btn__primary" on:click={checkall}>{completed ?
...And 25 more matches

CustomizableUI.jsm
there are three main types of widgets: 'legacy' xul widgets, which are the way customizableui represents widgets whose dom representation is present (or overlaid) into a window; api-style widgets, which are the new widgets customizableui can create and manage for you.
... custom which are widgets that are custom-created by some js supplied by the consumer for more details, see api-provided widgets.
... the lifetime of your widget should be identical to the lifetime of the add-on - it's process-global, so if you call createwidget on bootstrap's "startup" and destroywidget on bootstrap's "shutdown", that's enough.
...And 25 more matches

Color picker tool - CSS: Cascading Style Sheets
'hsl' : 'hsv'; this.color.setformat(this.picker_mode); this.createpickingarea(); this.createhuearea(); this.newinputcomponent('h', 'hue', this.inputchangehue.bind(this)); this.newinputcomponent('s', 'saturation', this.inputchangesaturation.bind(this)); this.newinputcomponent('v', 'value', this.inputchangevalue.bind(this)); this.newinputcomponent('l', 'lightness', this.inputchangelightness.bind(this)); this.createalphaarea(); this.newinputcompone...
...nt('r', 'red', this.inputchangered.bind(this)); this.newinputcomponent('g', 'green', this.inputchangegreen.bind(this)); this.newinputcomponent('b', 'blue', this.inputchangeblue.bind(this)); this.createpreviewbox(); this.createchangemodebutton(); this.newinputcomponent('alpha', 'alpha', this.inputchangealpha.bind(this)); this.newinputcomponent('hexa', 'hexa', this.inputchangehexa.bind(this)); this.setcolor(this.color); pickers[topic] = this; } /*************************************************************************/ // function for generating the color-picker /*************************************************************************/ colorpicker.prototype.createpickingarea = function createpickingarea() { var area = document.createelement('div'); var picker = do...
...cument.createelement('div'); area.classname = 'picking-area'; picker.classname = 'picker'; this.picking_area = area; this.color_picker = picker; setmousetracking(area, this.updatecolor.bind(this)); area.appendchild(picker); this.node.appendchild(area); }; colorpicker.prototype.createhuearea = function createhuearea() { var area = document.createelement('div'); var picker = document.createelement('div'); area.classname = 'hue'; picker.classname ='slider-picker'; this.hue_area = area; this.hue_picker = picker; setmousetracking(area, this.updatehueslider.bind(this)); area.appendchild(picker); this.node.appendchild(area); }; colorpicker.prototype.createalphaarea = function createalphaarea() { var area = document.createelement('div'); var mask = documen...
...And 25 more matches

StringView - Archive of obsolete content
the aims of this library are: to create a c-like interface for strings (i.e., an array of character codes — an arraybufferview in javascript) based upon the javascript arraybuffer interface to create a highly extensible library that anyone can extend by adding methods to the object stringview.prototype to create a collection of methods for such string-like objects (since now: stringviews) which work strictly on arrays of numbers rather than on creating new immutable javascript strings to work with unicode encodings other than javascript's default utf-16 domstrings introduction as web applications become more and more powerful, adding features such as audio and video manipulation, access to raw data using websockets, and so forth, it has become clear that there are times when i...
...int16array; break encswitch; case "utf-32": ftaview = uint32array; ntranscrtype &= 14; break encswitch; default: /* case "ascii", or case "binarystring" or unknown cases */ ftaview = uint8array; ntranscrtype &= 14; } typeswitch: switch (typeof vinput) { case "string": /* the input argument is a primitive string: a new buffer will be created.
... */ ntranscrtype &= 7; break typeswitch; case "object": classswitch: switch (vinput.constructor) { case stringview: /* the input argument is a stringview: a new buffer will be created.
...And 24 more matches

Object-oriented JavaScript for beginners - Learn web development
previous overview: objects next with the basics out of the way, we'll now focus on object-oriented javascript (oojs) — this article presents a basic view of object-oriented programming (oop) theory, then explores how javascript emulates object classes via constructor functions, and how to create object instances.
... objective: to understand the basic theory behind object-oriented programming, how this relates to javascript ("everything is an object"), and how to create constructors and object instances.
... creating actual objects from our class, we can create object instances — objects that contain the data and functionality defined in the class.
...And 24 more matches

NSS Tools certutil
using the certificate database tool the certificate database tool is a command-line utility that can create and modify the netscape communicator cert8.db and key3.db database files.
... it can also list, generate, modify, or delete certificates within the cert8.db file and create or change the password, generate new public and private key pairs, display the contents of the key database, or delete key pairs within the key3.db file.
...certificate database tool command options and their arguments are defined as follows: options -n create new certificate and key databases.
...And 24 more matches

Traversing an HTML table with JavaScript and DOM Interfaces - Web APIs
you will learn how to create, access and control, and remove html elements dynamically.
... example: creating an html table dynamically (sample1.html) html <input type="button" value="generate a table." onclick="generate_table()"> javascript function generate_table() { // get the reference for the body var body = document.getelementsbytagname("body")[0]; // creates a <table> element and a <tbody> element var tbl = document.createelement("table"); var tblbody = document.createelement("tbody"); // creating all cells for (var i = 0; i < 2; i++) { // creates a table row var row = document.createelement("tr"); for (var j = 0; j < 2; j++) { // create a <td> element and a text node, make the text // node the contents of the <td>,...
... and put the <td> at // the end of the table row var cell = document.createelement("td"); var celltext = document.createtextnode("cell in row "+i+", column "+j); cell.appendchild(celltext); row.appendchild(cell); } // add the row to the end of the table body tblbody.appendchild(row); } // put the <tbody> in the <table> tbl.appendchild(tblbody); // appends <table> into <body> body.appendchild(tbl); // sets the border attribute of tbl to 2; tbl.setattribute("border", "2"); } note the order in which we created the elements and the text node: first we created the <table> element.
...And 24 more matches

OS.File for the main thread
var img = new image(); img.onload = function() { var canvas = document.createelementns('http://www.w3.org/1999/xhtml', 'canvas'); canvas.width = img.naturalwidth; canvas.height = img.naturalheight; var ctx = canvas.getcontext('2d'); ctx.drawimage(img, 0, 0); (canvas.toblobhd || canvas.toblob).call(canvas, function(b) { var r = cc['@mozilla.org/files/filereader;1'].createinstance(ci.nsidomfilereader); //new filereader(); r.onloadend = fun...
...if the file does not exist, it is created.
...tions); promise<void> setcurrentdirectory(in string path); promise<void> setdates(in string path, in date|number accessdate, in date|number modificationdate); promise<void> setpermissions(in string path, in object options ); promise<file.info> stat(in string path, [optional] in object options); promise<void> unixsymlink(in string targetpath, in string createpath); promise<void> writeatomic(in string path, in arrayview data, in object options); methods os.file.open() use method os.file.open() to open a file.
...And 23 more matches

Migrating from webkitAudioContext - Web APIs
creategainnode() has been renamed to creategain.
... createdelaynode() has been renamed to createdelay.
... createjavascriptnode() has been renamed to createscriptprocessor.
...And 23 more matches

NSS tools : certutil
name certutil — manage keys and certificate in both nss databases and other nss tokens synopsis certutil [options] [[arguments]] description the certificate database tool, certutil, is a command-line utility that can create and modify certificate and key databases.
... it can specifically list, generate, modify, or delete certificates, create or change the password, generate new public and private key pairs, display the contents of the key database, or delete key pairs within the key database.
... certificate issuance, part of the key and certificate management process, requires that keys and certificates be created in the key database.
...And 22 more matches

Linear-gradient Generator - CSS: Cascading Style Sheets
'hsl' : 'hsv'; this.color.setformat(this.picker_mode); this.createpickingarea(); this.createhuearea(); this.newinputcomponent('h', 'hue', this.inputchangehue.bind(this)); this.newinputcomponent('s', 'saturation', this.inputchangesaturation.bind(this)); this.newinputcomponent('v', 'value', this.inputchangevalue.bind(this)); this.newinputcomponent('l', 'lightness', this.inputchangelightness.bind(this)); this.createalphaarea(); this.newinputcompone...
...nt('r', 'red', this.inputchangered.bind(this)); this.newinputcomponent('g', 'green', this.inputchangegreen.bind(this)); this.newinputcomponent('b', 'blue', this.inputchangeblue.bind(this)); this.createpreviewbox(); this.createchangemodebutton(); this.newinputcomponent('alpha', 'alpha', this.inputchangealpha.bind(this)); this.newinputcomponent('hexa', 'hexa', this.inputchangehexa.bind(this)); this.setcolor(this.color); pickers[topic] = this; } /*************************************************************************/ // function for generating the color-picker /*************************************************************************/ colorpicker.prototype.createpickingarea = function createpickingarea() { var area = document.createelement('div'); var picker = do...
...cument.createelement('div'); area.classname = 'picking-area'; picker.classname = 'picker'; this.picking_area = area; this.color_picker = picker; setmousetracking(area, this.updatecolor.bind(this)); area.appendchild(picker); this.node.appendchild(area); }; colorpicker.prototype.createhuearea = function createhuearea() { var area = document.createelement('div'); var picker = document.createelement('div'); area.classname = 'hue'; picker.classname ='slider-picker'; this.hue_area = area; this.hue_picker = picker; setmousetracking(area, this.updatehueslider.bind(this)); area.appendchild(picker); this.node.appendchild(area); }; colorpicker.prototype.createalphaarea = function createalphaarea() { var mask = document.createelement('div'); var picker = docum...
...And 22 more matches

JXON - Archive of obsolete content
</item_number> <discount_until>dec 25, 1995</discount_until> <price>42.50</price> <size description="medium"> <color_swatch image="black_cardigan.jpg">black</color_swatch> </size> </catalog_item> </product> <script type="text/javascript"><![cdata[function matchwo(a,b) { if (a < b && a < 0) { return 1; } else { return 0; } }]]></script> </catalog> first, create a dom tree like the previous example as described in the how to create a dom tree article.
...|*| 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 (oparento...
...bj.constructor === date) { oparentel.appendchild(onewdoc.createtextnode(oparentobj.togmtstring())); } for (var sname in oparentobj) { if (isfinite(sname)) { continue; } /* verbosity level is 0 */ vvalue = oparentobj[sname]; if (sname === "keyvalue") { if (vvalue !== null && vvalue !== true) { oparentel.appendchild(onewdoc.createtextnode(vvalue.constructor === date ?
...And 21 more matches

certutil
synopsis certutil [options] arguments description the certificate database tool, certutil, is a command-line utility that can create and modify certificate and key database files.
... it can also list, generate, modify, or delete certificates within the database, create or change the password, generate new public and private key pairs, display the contents of the key database, or delete key pairs within the key database.
... -c create a new binary certificate file from a binary certificate request file.
...And 21 more matches

Working with objects - JavaScript
this chapter describes how to use objects, properties, functions, and methods, and how to create your own objects.
...for example, let's create an object named mycar and give it properties named make, model, and year as follows: var mycar = new object(); mycar.make = 'ford'; mycar.model = 'mustang'; mycar.year = 1969; the above example could also be written using an object initializer, which is a comma-delimited list of zero or more pairs of property names and associated values of an object, enclosed in curly braces ({}): var mycar =...
...examples are as follows: // four variables are created and assigned in a single go, // separated by commas var myobj = new object(), str = 'mystring', rand = math.random(), obj = new object(); myobj.type = 'dot syntax'; myobj['date created'] = 'string with space'; myobj[str] = 'string value'; myobj[rand] = 'random number'; myobj[obj] = 'object'; myobj[''] = 'even an empt...
...And 21 more matches

SVG documentation index - SVG: Scalable Vector Graphics
10 replaced element svg this page was auto-generated because a user created a sub-page to this page.
... 273 clipping and masking advanced, svg, svg:tutorial erasing part of what one has created might at first sight look contradictory.
... but when you try to create a semicircle in svg, you will find out the use of the following properties quickly.
...And 21 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> <sc...
... var ball = { _width: 320, _height: 480 }; ball.boot = function(game) {}; ball.boot.prototype = { preload: function() { this.load.image('preloaderbg', 'img/loading-bg.png'); this.load.image('preloaderbar', 'img/loading-bar.png'); }, create: function() { this.game.scale.scalemode = phaser.scalemanager.show_all; this.game.scale.pagealignhorizontally = true; this.game.scale.pagealignvertically = true; this.game.state.start('preloader'); } }; the main ball object is defined and we're adding two variables called _width and _height that are the width and the height of the game canvas — they will hel...
...the create function holds some basic configuration: we're setting up the scaling and alignment of the canvas, and moving on to the preload state when everything's ready.
...And 20 more matches

Mozilla accessibility architecture
even if a child accessible of the document is asked for first, the doc accessible will be created first, because it is needed to cache any accessibles created within it.
... when the doc accessible is asked for, an event is fired which reaches the presshell, which then uses the accessibility service singleton (nsiaccessibilityservice) to create the doc accessible and return it back to the widget code.
... the reason that the doc accessible is not created directly in the widget code where it's needed is that the widget code has no knowledge what nsidomnode is associated with the current window's document object.
...And 20 more matches

Document - Web APIs
it provides functionality globally to the document, like how to obtain the page's url and create new elements in the document.
... constructor document() creates a new document object.
... document.timelineread only returns timeline as a special instance of documenttimeline that is automatically created on page load.
...And 20 more matches

Signaling and video calling - Web APIs
in this article, we will further enhance the websocket chat first created as part of our websocket documentation (this article link is forthcoming; it isn't actually online yet) to support opening a two-way video call between users.
...how do we create this server and how does the signaling process actually work?
... exchanging session descriptions when starting the signaling process, an offer is created by the user initiating the call.
...And 20 more matches

Window.open() - Web APIs
windowname optional a domstring specifying the name of the browsing context (window, <iframe> or tab) into which to load the specified resource; if the name doesn't indicate an existing context, a new window is created and is given the name specified by windowname.
... return value a windowproxy object, which is basically a thin wrapper for the window object representing the newly created window, and has all its features available.
... description the open() method creates a new secondary browser window, similar to choosing new window from the file menu.
...And 20 more matches

Drawing graphics - Learn web development
the web still had no way to effectively create animations, games, 3d scenes, and other requirements commonly handled by lower level languages such as c++ or java.
...webgl allows you to create real 3d graphics inside your web browser; the below example shows a simple rotating webgl cube: this article will focus mainly on 2d canvas, as raw webgl code is very complex.
... we will however show how to use a webgl library to create a 3d scene more easily, and you can find a tutorial covering raw webgl elsewhere — see getting started with webgl.
...And 19 more matches

Working with Svelte stores - Learn web development
objective: learn how to use svelte stores using stores we will create an alert component that shows notifications on screen, which can receive messages from any component.
...if you create your own stores honoring the store contract, you get this reactivity syntactic sugar for free.
... creating the alert component to show how to work with stores, we will create an alert component.
...And 19 more matches

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.
...using xpcom utilities to make things easier shows some simpler and more elegant ways to create an xpcom component using generic macros, and this chapter is more about learning the basics.
...as you can see in onion peel view of xpcom component creation, the main accessor for the xpcom object is createinstance, which is expected to return the object that matches a given cid and iid pair.
...And 19 more matches

Web Authentication API - Web APIs
similar to the other forms of the credential management api, the web authentication api has two basic methods that correspond to register and login: navigator.credentials.create() - when used with the publickey option, creates new credentials, either for registering a new account or for associating a new asymmetric key pair credentials with an existing account.
... please note: both create() and get() require a secure context (e.g.
... in their most basic forms, both create() and get() receive a very large random number called a challenge from the server and they return the challenge signed by the private key back to the server.
...And 19 more matches

Basic Concepts of grid layout - CSS: Cascading Style Sheets
css grid layout has the following features: fixed and flexible track sizes you can create a grid with fixed track sizes – using pixels for example.
...you can also create a grid using flexible sizes with percentages or with the new fr unit designed for this purpose.
... grid is a powerful specification that, when combined with other parts of css such as flexbox, can help you create layouts that were previously impossible to build in css.
...And 19 more matches

Creating custom Firefox extensions with the Mozilla build system - Archive of obsolete content
for complex extensions, it may be necessary to create components in c++ that provide additional functionality.
...i should also stress that you do not have to build mozilla or use the mozilla build system if you want to create c++ components for mozilla.
... if you are just looking to create an xpcom component or two, this is probably overkill, and you might want to take a look at this guide instead.
...And 18 more matches

Manifest Files - Archive of obsolete content
« previousnext » in this section, we'll see how to put chrome and xul files into a package and create the manifest files for them.
... if you just want to try testing privileged xul code in the firefox browser, you can do this easily by just using a manifest with only one line in it: create a new directory somewhere.
... for example, on a windows machine, you might use c:\testfiles create a new ascii1 file called test.manifest in the chrome directory.
...And 18 more matches

mozIStorageConnection
method overview void asyncclose([optional] in mozistoragecompletioncallback acallback); void begintransaction(); void begintransactionas(in print32 transactiontype); mozistoragestatement clone([optional] in boolean areadonly); void close(); void committransaction(); void createaggregatefunction(in autf8string afunctionname, in long anumarguments, in mozistorageaggregatefunction afunction); mozistorageasyncstatement createasyncstatement(in autf8string asqlstatement); void createfunction(in autf8string afunctionname, in long anumarguments, in mozistoragefunction afunction); mozistoragestatement createstatement(in autf8string asqlstatement); ...
... void createtable(in string atablename, in string atableschema); mozistoragependingstatement executeasync([array, size_is(anumstatements)] in mozistoragebasestatement astatements, in unsigned long anumstatements, [optional] in mozistoragestatementcallback acallback ); void executesimplesql(in autf8string asqlstatement); boolean indexexists(in autf8string aindexname); void preload(); obsolete since gecko 1.9 void removefunction(in autf8string afunctionname); mozistorageprogresshandler removeprogresshandler(); void rollbacktransaction(); void setgrowthincrement(in print32 aincrement, in autf8string adatabasename); mozistorageprogresshandler setprogresshandler(in print32 agranularity, in mozistorageprogressha...
...before closing the connection, you need to finalize all statements created for the connection.
...And 18 more matches

nsITextInputProcessor
/nsitextinputprocessor.idlscriptable this interface is a text input events synthesizer and manages its composition and modifier state 1.0 66 introduced gecko 38 inherits from: nsisupports last changed in gecko 38.0 (firefox 38.0 / thunderbird 38.0 / seamonkey 2.35) the motivation of this interface is to provide better api than nsidomwindowutils to dispatch key events and create, modify, and commit composition in higher level.
... you can create an instance of this interface with the following code: var tip = components.classes["@mozilla.org/text-input-processor;1"].
... createinstance(components.interfaces.nsitextinputprocessor); next, you need to get the rights to create composition or dispatch keyboard events with begininputtransaction() or begininputtransactionfortests(): if (!tip.begininputtransaction(window, callback)) { return; } if begininputtransaction() or begininputtransactionfortests() returns false, it means that another instance of nsitextinputprocessor has composition on the window or is dispatching an event.
...And 18 more matches

WebIDL bindings
for each interface, a namespace whose name is the name of the interface with binding appended is created, and all the things pertaining to that interface's binding go in that namespace.
...note that you may not need to do this if your objects can only be created, never gotten from other objects.
...(this allows the return value to be implicitly converted to a parentobject instance by the compiler via one of that class's non-explicit constructors.) if many instances of myinterface are expected to be created quicky, the return value of getparentobject should itself inherit from nswrappercache for optimal performance.
...And 18 more matches

BaseAudioContext - Web APIs
e-width="2px" /><text x="231" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">baseaudiocontext</text></a></svg></div> a:hover text { fill: #0095dd; pointer-events: all;} properties baseaudiocontext.audioworklet read only secure context returns the audioworklet object, which can be used to create and manage audionodes in which javascript code implementing the audioworkletprocessor interface are run in the background to process audio data.
... baseaudiocontext.createanalyser() creates an analysernode, which can be used to expose audio time and frequency data and for example to create data visualisations.
... baseaudiocontext.createbiquadfilter() creates a biquadfilternode, which represents a second order filter configurable as several different common filter types: high-pass, low-pass, band-pass, etc baseaudiocontext.createbuffer() creates a new, empty audiobuffer object, which can then be populated by data and played via an audiobuffersourcenode.
...And 18 more matches

SVGPathElement - Web APIs
"><rect x="-99" y="65" width="140" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="-29" y="94" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgpathelement</text></a></svg></div> a:hover text { fill: #0095dd; pointer-events: all;} note: in svg 2 the getpathsegatlength() and createsvgpathseg* methods were removed and the pathlength property and the gettotallength() and getpointatlength() methods were moved to svggeometryelement.
... svgpathelement.createsvgpathsegclosepath() returns a stand-alone, parentless svgpathsegclosepath object.
... svgpathelement.createsvgpathsegmovetoabs() returns a stand-alone, parentless svgpathsegmovetoabs object.
...And 18 more matches

File I/O - Archive of obsolete content
createinstance(components.interfaces.nsilocalfile); file.initwithpath("/home"); note: the path should be in the "native" form (for example"c:\\windows").
... queryinterface(components.interfaces.nsilocalfile).path); } creating folders fileutils.getdir() can create a folder automatically if it doesn't exist yet: components.utils.import("resource://gre/modules/fileutils.jsm"); var dir = fileutils.getdir("profd", ["dir"], true); the above example creates a folder called "dir" in the user's profile folder.
... you can also create a directory explicitly; for more information refer to nsifile.create().
...And 17 more matches

Templates - Archive of obsolete content
populating elements xul provides a method in which we create elements from data supplied by rdf, either from an rdf file or from an internal datasource.
... to allow the creation of elements based on rdf data, you need to provide a simple template which will be duplicated for each element that is created.
... the template is created using the template element.
...And 17 more matches

Getting started with React - Learn web development
we'll discover a little bit of detail about its background and use cases, set up a basic react toolchain on our local computer, and create and play with a simple starter app — learning a bit about how react works in the process.
... objective: to set up a local react development environment, create a start app, and understand the basics of how it works hello react as its official tagline states, react is a library for building user interfaces.
...these components can be composed together to create a full ui, and react abstracts away much of the rendering work, leaving you to concentrate on the ui design.
...And 17 more matches

Legacy layout methods - Learn web development
layout and grid systems before css grid layout it may seem surprising to anyone coming from a design background that css didn’t have an inbuilt grid system until very recently, and instead we seemed to be using a variety of sub-optimal methods to create grid-like designs.
...this knowledge will be helpful to you if you need to create fallback code for browsers that do not support newer methods, in addition to allowing you to work on existing projects which use these types of systems.
... it is worth bearing in mind, as we explore these systems, that none of them actually create a grid in the way that css grid layout creates a grid.
...And 16 more matches

Enc Dec MAC Using Key Wrap CertReq PKCS10 CSR
ding */ infile = pr_open(infilename, pr_rdonly, 0); if (!infile) { pr_fprintf(pr_stderr, "unable to open \"%s\" for reading.\n", infilename); rv = secfailure; goto cleanup; } /* sign using private key */ sgn = sgn_newcontext(sec_oid_pkcs1_md5_with_rsa_encryption, pk); if (!sgn) { pr_fprintf(pr_stderr, "unable to create context for signing\n"); rv = secfailure; goto cleanup; } rv = sgn_begin(sgn); if (rv != secsuccess) { pr_fprintf(pr_stderr, "problem while sgn_begin\n"); goto cleanup; } while ((nb = pr_read(infile, ibuf, sizeof(ibuf))) > 0) { rv = sgn_update(sgn, ibuf, nb); if (rv != secsuccess) { pr_fprintf(pr_stderr, "...
...6]; secstatus rv = secfailure; vfycontext *vfy = null; prfiledesc *infile = null; /* open the input file for reading */ infile = pr_open(infilename, pr_rdonly, 0); if (!infile) { pr_fprintf(pr_stderr, "unable to open \"%s\" for reading.\n", infilename); rv = secfailure; goto cleanup; } vfy = vfy_createcontext(pk, sigitem, sec_oid_pkcs1_md5_with_rsa_encryption, pwdata); if (!vfy) { pr_fprintf(pr_stderr, "unable to create context for verifying signature\n"); rv = secfailure; goto cleanup; } rv = vfy_begin(vfy); if (rv != secsuccess) { pr_fprintf(pr_stderr, "p...
... pr_gmtparameters, &printabletime); if ( warpmonths ) { printabletime.tm_month += warpmonths; now = pr_implodetime (&printabletime); pr_explodetime (now, pr_gmtparameters, &printabletime); } printabletime.tm_month += validitymonths; after = pr_implodetime (&printabletime); /* note that the time is now in micro-second unit */ validity = cert_createvalidity (now, after); if (validity) { cert = cert_createcertificate(serialnumber, (selfsign ?
...And 16 more matches

sample2
96]; prfiledesc *infile = null; sgncontext *sgn = null; /* open the input file for reading */ infile = pr_open(infilename, pr_rdonly, 0); if (!infile) { pr_fprintf(pr_stderr, "unable to open \"%s\" for reading.\n", infilename); rv = secfailure; goto cleanup; } /* sign using private key */ sgn = sgn_newcontext(sec_oid_pkcs1_md5_with_rsa_encryption, pk); if (!sgn) { pr_fprintf(pr_stderr, "unable to create context for signing\n"); rv = secfailure; goto cleanup; } rv = sgn_begin(sgn); if (rv != secsuccess) { pr_fprintf(pr_stderr, "problem while sgn_begin\n"); goto cleanup; } while ((nb = pr_read(infile, ibuf, sizeof(ibuf))) > 0) { rv = sgn_update(sgn, ibuf, nb); if (rv != secsuccess) { pr_fprintf(pr_stderr, "problem while sgn_update\n"); goto cleanup; } } rv = sgn_end(sgn, res); if (rv != secsuccess...
...e, seckeypublickey *pk, secitem *sigitem, secupwdata *pwdata) { unsigned int nb; unsigned char ibuf[4096]; secstatus rv = secfailure; vfycontext *vfy = null; prfiledesc *infile = null; /* open the input file for reading */ infile = pr_open(infilename, pr_rdonly, 0); if (!infile) { pr_fprintf(pr_stderr, "unable to open \"%s\" for reading.\n", infilename); rv = secfailure; goto cleanup; } vfy = vfy_createcontext(pk, sigitem, sec_oid_pkcs1_md5_with_rsa_encryption, pwdata); if (!vfy) { pr_fprintf(pr_stderr, "unable to create context for verifying signature\n"); rv = secfailure; goto cleanup; } rv = vfy_begin(vfy); if (rv != secsuccess) { pr_fprintf(pr_stderr, "problem while vfy_begin\n"); goto cleanup; } while ((nb = pr_read(infile, ibuf, sizeof(ibuf))) > 0) { rv = vfy_update(vfy, ibuf, nb); if (rv ...
...); goto cleanup; } } now = pr_now(); pr_explodetime (now, pr_gmtparameters, &printabletime); if ( warpmonths ) { printabletime.tm_month += warpmonths; now = pr_implodetime (&printabletime); pr_explodetime (now, pr_gmtparameters, &printabletime); } printabletime.tm_month += validitymonths; after = pr_implodetime (&printabletime); /* note that the time is now in micro-second unit */ validity = cert_createvalidity (now, after); if (validity) { cert = cert_createcertificate(serialnumber, (selfsign ?
...And 16 more matches

Starting WebLock
we have already created a module that implements most of the generic component functionality (e.g.
...when a gecko application starts up, registered components are created and notified via the general-purpose observer interface nsiobserver.
...for example, an object may be created and have its observe method called at startup, or it may register to be notified prior to xpcom shutdown.
...And 16 more matches

Applying styles and colors - Web APIs
we create a canvasgradient object by using one of the following methods.
... createlineargradient(x1, y1, x2, y2) creates a linear gradient object with a starting point of (x1, y1) and an end point of (x2, y2).
... createradialgradient(x1, y1, r1, x2, y2, r2) creates a radial gradient.
...And 16 more matches

Timing element visibility with the Intersection Observer API - Web APIs
articles each article is contained in an <article> element, styled like this: article { background-color: white; padding: 6px; } article:not(:last-child) { margin-bottom: 8px; } article h2 { margin-top: 0; } this creates article boxes with a white background which float atop the blue background, with a small margin around the article.
... the observer, adobserver, is created by calling intersectionobserver's constructor, passing in the callback function, intersectioncallback, and our options.
... if the document has just become visible, we reverse this process: first we go through previouslyvisibleads and set each one's dataset.lastviewstarted to the current document's time (in milliseconds since the document was created) using the performance.now() method.
...And 16 more matches

A re-introduction to JavaScript (JS tutorial) - JavaScript
javascript was created in 1995 by brendan eich while he was an engineer at netscape.
...however, starting with ecmascript 2015, let and const declarations allow you to create block-scoped variables.
... there are two basic ways to create an empty object: var obj = new object(); and: var obj = {}; these are semantically equivalent; the second is called object literal syntax and is more convenient.
...And 16 more matches

context-menu - Archive of obsolete content
for example, if your add-on needs to add a context menu item whenever the user visits a certain page, don't create the item when that page loads, and don't remove it when the page unloads.
... rather, create your item only once and supply a context that matches the target url.
... context menu items are displayed in the order created or in the case of sub menus the order added to the sub menu.
...And 15 more matches

Inheritance in JavaScript - Learn web development
previous overview: objects next with most of the gory details of oojs now explained, this article shows how to create "child" object classes (constructors) that inherit features from their "parent" classes.
...how do we create an object in javascript that inherits from another object?
... say we wanted to create a teacher class, like the one we described in our initial object-oriented definition, which inherits all the members from person, but also includes: a new property, subject — this will contain the subject the teacher teaches.
...And 15 more matches

NSS functions
cert_checkcertusage mxr 3.3 and later cert_comparename mxr 3.2 and later cert_comparevaliditytimes mxr 3.11 and later cert_completecrldecodeentries mxr 3.6 and later cert_convertanddecodecertificate mxr 3.9.3 and later cert_copyname mxr 3.4 and later cert_copyrdn mxr 3.5 and later cert_createava mxr 3.2.1 and later cert_createcertificate mxr 3.5 and later cert_createcertificaterequest mxr 3.2 and later cert_createname mxr 3.2.1 and later cert_createocspcertid mxr 3.6 and later cert_createocsprequest mxr 3.6 and later cert_createrdn mxr 3.2.1 and later cert_createsubjectcertlist ...
...mxr 3.4 and later cert_createvalidity mxr 3.5 and later cert_crlcacherefreshissuer mxr 3.7 and later cert_decodealtnameextension mxr 3.10 and later cert_decodeauthinfoaccessextension mxr 3.10 and later cert_decodeauthkeyid mxr 3.10 and later cert_decodeavavalue mxr 3.4 and later cert_decodebasicconstraintvalue mxr 3.2 and later cert_decodecertfrompackage mxr 3.4 and later cert_decodecertificatepoliciesextension mxr 3.2 and later cert_decodecertpackage mxr 3.2 and later cert_decodecrldistributionpoints mxr 3.10 and later cert_decodedercrl mxr 3.2 and later cert_decodedercrlwithflags mxr 3.6 and later ...
... pk11_clonecontext mxr 3.2 and later pk11_configurepkcs11 mxr 3.2 and later pk11_convertsessionprivkeytotokenprivkey mxr 3.6 and later pk11_convertsessionsymkeytotokensymkey mxr 3.6 and later pk11_copytokenprivkeytosessionprivkey mxr 3.11 and later pk11_createcontextbysymkey mxr 3.2 and later pk11_createdigestcontext mxr 3.2 and later pk11_creategenericobject mxr 3.12 and later pk11_createmergelog mxr 3.12 and later pk11_createpbealgorithmid mxr 3.2 and later pk11_createpbev2algorithmid mxr 3.12 and l...
...And 15 more matches

Storage
create statements to execute on the connection - mozistoragestatement.
... opening a connection javascript example of opening my_db_file_name.sqlite in the profile directory: components.utils.import("resource://gre/modules/services.jsm"); components.utils.import("resource://gre/modules/fileutils.jsm"); let file = fileutils.getfile("profd", ["my_db_file_name.sqlite"]); let dbconn = services.storage.opendatabase(file); // will also create the file if it does not exist likewise, the c++ would look like this: nscomptr<nsifile> dbfile; rv = ns_getspecialdirectory(ns_app_user_profile_50_dir, getter_addrefs(dbfile)); ns_ensure_success(rv, rv); rv = dbfile->append(ns_literal_string("my_db_file_name.sqlite")); ns_ensure_success(rv, rv); nscomptr<mozistorageservice> dbservice = do_getservice(moz_storage_se...
... no results to be returned if you do not need to get any results back, you can use mozistorageconnection.executesimplesql() api like this in javascript: dbconn.executesimplesql("create temp table table_name (column_name integer)"); similarly, the c++ looks like this: rv = mdbconn->executesimplesql(ns_literal_cstring("create temp table table_name (column_name integer)")); ns_ensure_success(rv, rv); results to be returned however, if you need to get results back, you should create the statement with the mozistorageconnection.createstatement() api like this in javascript: va...
...And 15 more matches

HTML documentation index - HTML: Hypertext Markup Language
3 applying color to html elements using css beginner, css, css colors, guide, html, html colors, html styles, styling html, color with css, there are lots of ways to add color to your html elements to create just the look you want.
...specifying the itemscope attribute for an element creates a new item, which results in a number of name-value pairs that are associated with the element.
... 28 slot global attributes, html, reference the slot global attribute assigns a slot in a shadow dom shadow tree to an element: an element with a slot attribute is assigned to the slot created by the <slot> element whose name attribute's value matches that slot attribute's value.
...And 15 more matches

Index - MDN Web Docs Glossary: Definitions of Web-related terms
52 crud glossary, infrastructure crud (create, read, update, delete) is an acronym for ways one can operate on stored data.
...in javascript, functions create a closure context.
...cryptanalysis creates techniques to break ciphers, in particular by methods more efficient than a brute-force search.
...And 14 more matches

IME handling guide
it handles native key events before or after focused application (depending on the platform) and creates a composition string (a.k.a.
...and the drop down menu is created by ime.
...if there is no proper textcomposition instance, it creates the instance.
...And 14 more matches

Mozilla DOM Hacking Guide
mozilla gives you the opportunity not only to use very powerful and complete dom support, but also to work on a world-class implementation of one of the greatest internet technologies ever created.
... the nsdomclassinfodata objects are created in the sclassinfodata array by explicitly initializing it.
... union { nsdomclassinfoconstructorfnc mconstructorfptr; nsdomclassinfoexternalconstructorfnc mexternalconstructorfptr; } u; this union is a pointer to a function typedef'ed: typedef nsiclassinfo* (*nsdomclassinfoconstructorfnc)(nsdomclassinfoid aid); or typedef nsiclassinfo* (*nsdomclassinfoexternalconstructorfnc) (const char* aname); it is initialized with the docreate member function of the helper class passed as third argument to the macro.
...And 14 more matches

Adding 2D content to a WebGL context - Web APIs
« previousnext » once you've successfully created a webgl context, you can start rendering into it.
...we need to define the shaders that will create the color for our simple scene as well as draw our object.
...the code below creates the two shaders by calling loadshader(), passing the type and source for the shader.
...And 14 more matches

Border-image generator - CSS: Cascading Style Sheets
-weight: bold; text-align: right; float: left; } #output .css-property .value { width: 65%; padding: 0 2.5%; word-break: break-all; float: left; } javascript content 'use strict'; /** * ui-slidersmanager */ var inputslidermanager = (function inputslidermanager() { var subscribers = {}; var sliders = []; var inputcomponent = function inputcomponent(obj) { var input = document.createelement('input'); input.setattribute('type', 'text'); input.style.width = 50 + obj.precision * 10 + 'px'; input.addeventlistener('click', function(e) { this.select(); }); input.addeventlistener('change', function(e) { var value = parsefloat(e.target.value); if (isnan(value) === true) setvalue(obj.topic, obj.value); else setvalue(obj.topic, value); }); return i...
...nput; }; var slidercomponent = function slidercomponent(obj, sign) { var slider = document.createelement('div'); var startx = null; var start_value = 0; slider.addeventlistener("click", function(e) { document.removeeventlistener("mousemove", slidermotion); setvalue(obj.topic, obj.value + obj.step * sign); }); slider.addeventlistener("mousedown", function(e) { startx = e.clientx; start_value = obj.value; document.body.style.cursor = "e-resize"; document.addeventlistener("mouseup", slideend); document.addeventlistener("mousemove", slidermotion); }); var slideend = function slideend(e) { document.removeeventlistener("mousemove", slidermotion); document.body.style.cursor = "auto"; slider.style.cursor = "pointer"; }; var slidermotion = functio...
...this.min : value; var input = new inputcomponent(this); var slider_left = new slidercomponent(this, -1); var slider_right = new slidercomponent(this, 1); slider_left.classname = 'ui-input-slider-left'; slider_right.classname = 'ui-input-slider-right'; if (name) { var info = document.createelement('span'); info.classname = 'ui-input-slider-info'; info.textcontent = name; node.appendchild(info); } node.appendchild(slider_left); node.appendchild(input); node.appendchild(slider_right); this.input = input; sliders[topic] = this; setvalue(topic, value); }; inputslider.prototype.setinputvalue = function setinputvalue() { this.input.value = this.value.tofixed(...
...And 14 more matches

platform/xpcom - Archive of obsolete content
var { class } = require('sdk/core/heritage'); var { unknown, factory } = require('sdk/platform/xpcom'); var { cc, ci } = require('chrome'); var contractid = '@me.org/helloworld'; // define a component var helloworld = class({ extends: unknown, get wrappedjsobject() this, hello: function() {return 'hello world';} }); // create and register the factory var factory = factory({ contract: contractid, component: helloworld }); // xpcom clients can retrieve and use this new // component in the normal way var wrapper = cc[contractid].createinstance(ci.nsisupports); var helloworld = wrapper.wrappedjsobject; console.log(helloworld.hello()); using class id you can specify a class id for the factory by setting the id optio...
...here's the example above, rewritten to use class id instead of contract id for lookup: var { class } = require('sdk/core/heritage'); var { unknown, factory } = require('sdk/platform/xpcom'); var { cc, ci, components } = require('chrome'); // define a component var helloworld = class({ extends: unknown, get wrappedjsobject() this, hello: function() {return 'hello world';} }); // create and register the factory var factory = factory({ component: helloworld }); var id = factory.id; // retrieve the factory by class id var wrapper = components.classesbyid[id].createinstance(ci.nsisupports); var helloworld = wrapper.wrappedjsobject; console.log(helloworld.hello()); replacing factories if the factory you create has the same contract id as an existing registered factory, then yo...
... contractidtocid('@me.org/helloworld'); var wrapper = components.classesbyid[id].createinstance(ci.nsisupports); the xpcom module exports a function factorybycontract to simplify this technique: var wrapper = xpcom.factorybycontract('@me.org/helloworld').createinstance(ci.nsisupports); registration by default, factories are registered and unregistered automatically.
...And 13 more matches

JavaScript Daemons Management - Archive of obsolete content
in the javascript programming language, daemons are all processes created by javascript timers or by a worker instantiation.
...in different objects (daemons) and then to create a constructor for such a class of objects (daemon) in order to standardize and simplify the instantiation of them.
...("daemon - not enough arguments"); } if (oowner) { this.owner = oowner }; this.task = ftask; if (isfinite(nrate) && nrate > 0) { this.rate = math.floor(nrate); } if (nlen > 0) { this.length = math.floor(nlen); } if (fonstart) { this.onstart = fonstart; } if (finit) { this.onstop = finit; finit.call(oowner, this.index, this.length, this.backw); } } /* create the daemon.blank() constructor and the global daemon.context object */ daemon.blank = function () {}; daemon.context = daemon.blank.prototype; /* make love with the gc :-) */ daemon.blank.prototype = /* important!
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Chapter 4: Using XPCOM—Implementing advanced processes - Archive of obsolete content
« previousnext » fixme: we should include a link to the mdc list of snippets fixme: we need to add a part about 'why and how to create your own component' c++/js this document was authored by hiroshi shimoda of clear code inc.
...listing 1 shows how you can use xpconnect to acquire references to xpcom services and create new xpcom objects.
...for other components, you can create as many instances as you need.
...And 13 more matches

Getting started with Svelte - Learn web development
then we will learn how to setup our development environment, create a sample app, understand the structure of the project, and see how to run it locally and build it for production.
... objective: to setup a local svelte development environment, create and build a starter app, and understand the basics of how it works.
... 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.
...And 13 more matches

Getting started with Vue - Learn web development
in this article we'll look at a little bit of vue background, learn how to install it and create a new project, study the high-level structure of the whole project and an individual component, see how to run the project locally, and get it prepared to start building our example.
... objective: to setup a local vue development environment, create a starter app, and understand the basics of how it works.
...this allows you to create markup managed entirely by vue, which can improve developer experience and performance when dealing with complex applications.
...And 13 more matches

Setting up your own test automation environment - Learn web development
create a new file inside your project directory called google_test.js: give it the following contents, then save it: const webdriver = require('selenium-webdriver'), by = webdriver.by, until = webdriver.until; const driver = new webdriver.builder() .forbrowser('firefox') .build(); driver.get('http://www.google.com'); driver.findelement(by.name('q')).sendkeys('webdriver'); driver.s...
... create another new file inside your project directory called google_test_multiple.js.
...iver - google search') { console.log('test passed'); } else { console.log('test failed'); } driver.quit(); }); }); } in terminal, make sure you are inside your project folder, then enter the following command: node google_test_multiple if you are using a mac and do decide to test safari, you might get an error message along the lines of "could not create a session: you must enable the 'allow remote automation' option in safari's develop menu to control safari via webdriver." if you get this, follow the given instruction and try again.
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nsIAppShellService
(firefox 8.0 / thunderbird 8.0 / seamonkey 2.5) implemented by: @mozilla.org/appshell/appshellservice;1 as a service: var appshellservice = components.classes["@mozilla.org/appshell/appshellservice;1"] .getservice(components.interfaces.nsiappshellservice); method overview void closetoplevelwindow(in nsixulwindow awindow); obsolete since gecko 1.8 void createhiddenwindow(in nsiappshell aappshell); native code only!
... boolean createstartupstate(in long awindowwidth, in long awindowheight); obsolete since gecko 1.8 nsixulwindow createtoplevelwindow(in nsixulwindow aparent, in nsiuri aurl, in pruint32 achromemask, in long ainitialwidth, in long ainitialheight, in nsiappshell aappshell); nsiwebnav createwindowlessbrowser (in bool aischrome) void destroyhiddenwindow(); void doprofilestartup(in nsicmdlineservice acmdlineservice, in boolean caninteract); obsolete since gecko 1.8 void ensure1window(in nsicmdlineservice acmdlineservice); obsolete since gecko 1.8 void enterlastwindowclosingsurvivalarea(); obsolete since gecko 1.8 void exitlastwindowclosingsurvivalarea(); obsolete since gecko 1.8 void gethiddenwindowandjscontext(out nsid...
... hiddendomwindow nsidomwindow return the (singleton) application hidden window, automatically created and maintained by this appshellservice.
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nsIDocShell
do not create an instance directly.
...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!
...obsolete 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...
...And 13 more matches

nsIXPConnect
void clearallwrappednativesecuritypolicies(); nsixpconnectjsobjectholder createsandbox(in jscontextptr cx, in nsiprincipal principal); native code only!
... nsistackframe createstackframelocation(in pruint32 alanguage, in string afilename, in string afunctionname, in print32 alinenumber, in nsistackframe acaller); void debugdump(in short depth); void debugdumpevalinjsstackframe(in pruint32 aframenumber, in string asourcetext); void debugdumpjsstack(in prbool showargs, in prbool showlocals, in prbool showthisprops); void debugdumpobject(in nsisupports acomobj, in short depth); [noscript,notxpcom] prbool definedomquickstubs(in jscontextptr cx, in jsobjectptr proto, in pruint32 flags, in pruint32 interfacecount, [array, size_is(interfacecount)] in nsiidptr interfacearray); jsval evalinsandboxobject(in astring source, in jscontextptr cx, in nsixpconnectjsobjectholder sandbox, in prbool re...
... exceptions thrown missing exception missing description native code only!createsandbox create a sandbox for evaluating code in isolation using evalinsandboxobject().
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Add to iPhoto
this.cfstringcreatewithcharacters = this.lib.declare("cfstringcreatewithcharacters", ctypes.default_abi, this.cfstringref, // returns a new cfstringref ctypes.voidptr_t, // allocator ctypes.jschar.ptr, // pointer to the unicode string c...
...types.int32_t); // length of the string cfstringcreatewithcharacters() is used to create a new cfstring object using a unicode string as the source string, which is copied into the new cfstring object.
... let's take a look at two of the routines declared here: this.cfurlcreatefromfilesystemrepresentation = this.lib.declare("cfurlcreatefromfilesystemrepresentation", ctypes.default_abi, this.cfurlref, // returns ctypes.voidptr_t, // input: allocator ctypes.unsigned_char.ptr, // input: pointer to string ...
...And 13 more matches

Mozilla
there are two ways to create a sidebar for firefox users: the social api and an extension.
... creating a language pack to create a language pack, or a localization repack, you first need to go through the initial setup process.
...some of them are simply the ones i use because i like them, while others are scripts that i've created to speed up the work.
...And 13 more matches

DOMMatrixReadOnly - Web APIs
dommatrixreadonly.flipx() returns a new dommatrix created by flipping the source matrix around its x-axis.
... dommatrixreadonly.flipy() returns a new dommatrix created by flipping the source matrix around its y-axis.
... dommatrixreadonly.inverse() returns a new dommatrix created by inverting the source matrix.
...And 13 more matches

Using files from web applications - Web APIs
function handlefiles(files) { for (let i = 0; i < files.length; i++) { const file = files[i]; if (!file.type.startswith('image/')){ continue } const img = document.createelement("img"); img.classlist.add("obj"); img.file = file; preview.appendchild(img); // assuming that "preview" is the div output where the content will be displayed.
...for each file that is an image, we create a new img element.
... using object urls the dom url.createobjecturl() and url.revokeobjecturl() methods let you create simple url strings that can be used to reference any data that can be referred to using a dom file object, including local files on the user's computer.
...And 13 more matches

Example and tutorial: Simple synth keyboard - Web APIs
the keyboard first, we create space to build the keyboard into.
... the volume control first we create the <div> to contain the settings bar, so it can be styled as needed.
... let notefreq = null; let customwaveform = null; let sineterms = null; let cosineterms = null; finally, global variables that will be used when constructing waveforms are created: notefreq will be an array of arrays; each array represents one octave, each of which contains one entry for each note in that octave.
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Using Web Workers - Web APIs
once created, a worker can send messages to the javascript code that created it by posting messages to an event handler specified by that code (and vice versa).
... web workers api a worker is an object created using a constructor (e.g.
... content security policy workers are considered to have their own execution context, distinct from the document that created them.
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Implementing a Microsoft Active Accessibility (MSAA) Server - Accessibility
msaa decision-making guide use msaa whenever you have created custom controls where you're handling the drawing, mouse and keyboard accessibility in your own code.
...there's a very good chance they won't ask for more than the events marked [important]: event_system_sound event_system_alert [can be important, to have auto-speaking for newly created role_alerts] event_system_foreground event_system_menustart [important] event_system_menuend [important] event_system_menupopupstart [important] event_system_menupopupend [important] event_system_capturestart event_system_captureend event_system_movesizestart event_system_movesizeend event_system_contexthelpstart event_system_contexthelpend event_s...
...ystem_dragdropstart event_system_dragdropend event_system_dialogstart event_system_dialogend event_system_scrollingstart event_system_scrollingend [possibly important, talk to at vendor] event_system_switchstart event_system_switchend event_system_minimizestart event_system_minimizeend event_object_create [don't implement, watching system generated versions of this event causes assistive technology crashes] event_object_destroy [don't implement, watching system generated versions of this event causes assistive technology crashes] event_object_show [can be important, depending on project] event_object_hide [can be important, depending on project] event_object_reorder [important for mutating docs] event_object_focus [important] event_o...
...And 13 more matches

Layout using named grid lines - CSS: Cascading Style Sheets
in previous guides we’ve looked at placing items by the lines created by defining grid tracks and also how to place items using named template areas.
...to demonstrate i’ll use the simple layout created in the guide on line-based placement.
... this time i’ll create the grid using named lines.
...And 13 more matches

SeaMonkey - making custom toolbar (SM ver. 1.x) - Archive of obsolete content
your operating system normally provides them: a way to create and work with files and directories a text editor for plain text files character encoding some text editors have a setting for character encoding.
...to check your text editor, create a plain text file named test.txt.
... create a new directory named: custombutton perform the following steps in this new directory, creating five files there.
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Custom toolbar button - Archive of obsolete content
your operating system normally provides them: a way to create and work with files and directories a text editor for plain text files character encoding some text editors have a setting for character encoding.
... to check your text editor, create a plain text file named test.txt.
...in the extensions directory, create a new directory with the following name.
...And 12 more matches

Simple Menu Bars - Archive of obsolete content
« previousnext » in this section, we'll see how to create a menu bar with menus on it.
...you can also create popup menus.
... the menu features of xul consist of a number of different elements which allow you to create menu bars or popup menus.
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LiveConnect Overview - Archive of obsolete content
when a javascript object is sent to java, the runtime engine creates a java wrapper of type jsobject; when a jsobject is sent from java to javascript, the runtime engine unwraps it to its original javascript object type.
...for example, you can create a java string object and assign it to the javascript variable mystring by using the new operator with the java constructor, as follows: var mystring = new java.lang.string("hello world"); in the previous example, the variable mystring is a javaobject because it holds an instance of the java object string.
...to create an instance of the helloworld class in redwood, you access the constructor of the class as follows: var red = new packages.redwood.helloworld(); you can also access classes in the default package (that is, classes that don't explicitly name a package).
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The HTML5 input types - Learn web development
objective: to understand the newer input type values available to create native form controls, and how to implement them using html.
... search field search fields are intended to be used to create search boxes on pages and apps.
... phone number field a special field for filling in phone numbers can be created using tel as the value of the type attribute: <input type="tel" id="tel" name="tel"> when accessed via a touch device with a dynamic keyboard, most devices will display a numeric keypad when type="tel" is encountered, meaning this type is useful whenever a numeric keypad is useful, and doesn't just have to be used for telephone numbers.
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What is JavaScript? - Learn web development
javascript is a scripting language that enables you to create dynamically updating content, control multimedia, animate images, and pretty much everything else.
...in the above example we take the string "player 1: " and join it to the name variable to create the complete text label, e.g.
... the canvas and webgl apis allow you to create animated 2d and 3d graphics.
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Mail composition back end
createandsendmessage the createandsendmessage method will create an rfc822 message and send it all in one operation as well as providing the ability to save disk files for later use.
... ns_imethod createandsendmessage( nsieditorshell *aeditor, - the editor object for the mail compose operation.
...this can be nsnull if you want to do the delivery operation "blind" sendmessagefile the sendmessagefile method will let the caller send a message that has been created by another process (note: createandsendmessage can accomplish this task).
...And 12 more matches

Streams - Plugins
the browser calls the plug-in methods npp_newstream, npp_writeready, npp_write, and npp_destroystream to, respectively, create a stream, find out how much data the plug-in can handle, push data into the stream, and delete it.
...in normal-mode streams, the browser calls the plug-in to tell it when a stream is created and to push more data.
... in contrast, for streams produced by the plug-in, the plug-in calls the plug-in api methods npp_newstream, npp_write, and npp_destroystream to create a stream, push data into it, and delete it.
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In depth: Microtasks and the JavaScript runtime environment - Web APIs
there are three types of code that create a new execution context: the global context is the execution context created to run the main body of your code; that is, any code that exists outside of a javascript function.
...this is frequently referred to as a "local context." using the ill-advised eval() function also creates a new execution context.
...tch(language) { case "es": greeting = `¡hola, ${user}!`; break; case "en": default: greeting = `hello, ${user}!`; break; } return greeting; } outputelem.innerhtml += localgreeting(user) + "<br>\r"; } greetuser("mike"); greetuser("teresa"); greetuser("veronica"); this short program contains three execution contexts, some of which are created and destroyed several times over the course of the program's execution.
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HTML elements reference - HTML: Hypertext Markup Language
this page lists all the html elements, which are created using tags.
...use the sectioning elements to create a broad outline for your page content, including header and footer navigation, and heading elements to identify sections of content.
... element description <a> the html <a> element (or anchor element), with its href attribute, creates a hyperlink to web pages, files, email addresses, locations in the same page, or anything else a url can address.
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Function.prototype.bind() - JavaScript
the bind() method creates a new function that, when called, has its this keyword set to the provided value, with a given sequence of arguments preceding any provided when the new function is called.
...when using bind to create a function (supplied as a callback) inside a settimeout, any primitive value passed as thisarg is converted to object.
... description the bind() function creates a new bound function, which is an exotic function object (a term from ecmascript 2015) that wraps the original function object.
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Understanding WebAssembly text format - WebAssembly
declaring globals in webassembly webassembly has the ability to create global variable instances, accessible from both javascript and importable/exportable across one or more webassembly.module instances.
... to create an equivalent value using javascript, you'd use the webassembly.global() constructor: const global = new webassembly.global({value: "i32", mutable: true}, 0); webassembly memory the above example is a pretty terrible logging function: it only prints a single integer!
... the key is that javascript can create webassembly linear memory instances via the webassembly.memory() interface, and access an existing memory instance (currently you can only have one per module instance) using the associated instance methods.
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jpm - Archive of obsolete content
on debian and ubuntu, this can be remedied by ensuring you installed the compatibility package, nodejs-legacy: sudo apt-get install nodejs-legacy on other distributions, you may have to create a local symlink to nodejs manually: sudo ln -s "$(which nodejs)" /usr/local/bin/node installing jpm after you have npm installed and node on your path, install jpm just as you would any other npm package.
... command reference jpm supports the following commands: jpm init create a skeleton add-on as a starting point for your add-on.
... create a new directory, change into it, and run jpm init.
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Migrate apps from Internet Explorer to Mozilla - Archive of obsolete content
the latest w3c html specification created the title attribute, which is meant to contain a detailed description of the link.
...methods mozilla uses to manipulate content method description appendchild( anode ) creates a new child node.
... createelement( atagname ) creates and returns a new and parentless dom node of the type specified by atagname.
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Modularization techniques - Archive of obsolete content
introduction the purpose of this document is provide all the information you need to create a new mozilla module or break existing code into a module.
... /* * the nsifactory interface */ class nsifactory: public nsisupports { public: ns_imethod createinstance(nsisupports *aouter, const nsiid &aiid, void **aresult) = 0; ns_imethod lockfactory(prbool alock) = 0; the reason for using factories is that it provides a mechanism for creating an object without having access to the class declaration for that object.
...we've created something called the nscomponentmanager.
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Trees - Archive of obsolete content
« previousnext » xul provides a way to create tabular or hierarchical lists using a tree.
...both can be used to create tables of data with multiple rows and columns, and both may contain column headers.
... the second part, the tree body, contains the data to appear in the tree and is created with a treechildren tag.
...And 11 more matches

XPCOM Interfaces - Archive of obsolete content
for example, if we wanted to create a mail application, we would need to write scripts which would connect to mail servers to retrieve and send mail.
...an interface would need to be created which describes properties and functions that can be performed on files.
...you can get a component using javascript code like that below: var afile = components.classes["@mozilla.org/file/local;1"].createinstance(); the file component is retrieved and stored in the afile variable.
...And 11 more matches

Building up a basic demo with A-Frame - Game development
environment setup let's start by setting up an environment to create something with a-frame.
... create a new directory to store your project in.
... html structure the first step is to create an html document — inside your project directory, create a new index.html file, and save the follow html inside it: <!doctype html> <html> <head> <meta charset="utf-8"> <title>mdn games: a-frame demo</title> <script src="aframe.min.js"></script> </head> <body> <!-- html goes here --> </body> </html> this contains some basic information like the document charset and <title>.
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Building up a basic demo with the PlayCanvas engine - Game development
playcanvas application to begin developing our game we have to create the playcanvas application first (using the given <canvas> element), and then start the update loop.
... var camera = new pc.entity(); camera.addcomponent("camera", { clearcolor: new pc.color(0.8, 0.8, 0.8) }); app.root.addchild(camera); camera.setposition(0, 0, 7); the code above will create a new entity.
...this allows us to make some space to visualize the objects that we will create later on.
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Grids - Learn web development
they help us to create designs where elements don’t jump around or change width as we move from page to page, providing greater consistency on our websites.
... creating your grid in css having decided on the grid that your design needs, you can use css grid layout to create that grid in css and place items onto it.
... we will look at the basic features of grid layout first and then explore how to create a simple grid system for your project.
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Graceful asynchronous programming with Promises - Learn web development
so instead of waiting for the user, getting the chosen devices enabled, and directly returning the mediastream for the stream created from the selected sources, getusermedia() returns a promise which is resolved with the mediastream once it's available.
...status: ${response.status}`); } else { return response.blob(); } }); each call to .then() creates a new promise.
...add the following lines inside the curly braces: let objecturl = url.createobjecturl(myblob); let image = document.createelement('img'); image.src = objecturl; document.body.appendchild(image); here we are running the url.createobjecturl() method, passing it as a parameter the blob returned when the second promise fulfills.
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Adding a new event
the latter is used only for abstruct super event class whose instance will never be created.
... virtual widgetevent* duplicate() const moz_override this method should create a new instance with copying its members except widget.
... create webidl of the event write a dom event definition with webidl.
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Localizing with Koala
introduction this tutorial will guide you through making a couple of changes to firefox's user interface using koala, an add-on for komodo edit created to help localizing mozilla.
... before you can use them, you need to create a new koala project.
... creating a new project create a new koala project by going to file > new > new project from template...
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sslfnc.html
you must use one of these functions to create a server cache.
... this function creates two caches: theserver session id cache (also called the server session cache, or server cache), and theclient-auth certificate cache (also called the client cert cache, or client auth cache).
... initializing multi-processing with a shared ssl server cache to start a multi-processing application, the initial parent process calls ssl_configmpserversidcache, and then creates child processes, by one of these methods: call fork and then exec (unix) call createprocess (win32) call pr_createprocess (both unix and win32) it is essential that the parent allow the child to inherit the file descriptors.
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Accessing the Windows Registry Using XPCOM
a simple example here's a simple example showing how to read your windows productid: var wrk = components.classes["@mozilla.org/windows-registry-key;1"] .createinstance(components.interfaces.nsiwindowsregkey); wrk.open(wrk.root_key_local_machine, "software\\microsoft\\windows\\currentversion", wrk.access_read); var id = wrk.readstringvalue("productid"); wrk.close(); this example, while simple, shows several important things about using the interface.
... first, you must use createinstance() to get an object implementing this interface, not getservice().
...if you want to create a new key, you can use the create() method, which takes the same parameters as open().
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Relationship of grid layout to other layout methods - CSS: Cascading Style Sheets
the same layout with css grids in this next example, i create the same layout using grid.
...we do not need to set anything on the items themselves; they will lay themselves out one into each cell of the created grid.
...when you use css grid layout you create a layout and then you place items into it, or you allow the auto-placement rules to place the items into the grid cells according to that strict grid.
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Indexed collections - JavaScript
creating an array the following statements create equivalent arrays: let arr = new array(element0, element1, ..., elementn) let arr = array(element0, element1, ..., elementn) let arr = [element0, element1, ..., elementn] element0, element1, ..., elementn is a list of values for the array's elements.
... to create an array with non-zero length, but without any items, either of the following can be used: // this...
...otherwise, an array with a single element (the provided value) will be created.
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Using the WebAssembly JavaScript API - WebAssembly
next, let’s create a simple html file called index.html in the same directory as your wasm file (can use our simple template if you haven’t got one easily available).
...create a <script></script> element in your html file, and add the following code to it: var importobject = { imports: { imported_func: arg => console.log(arg) } }; streaming the webassembly module new in firefox 58 is the ability to compile and instantiate webassembly modules directly from underlying sources.
...in addition, newer implementations can also create shared memories, which can be transferred between window and worker contexts using postmessage(), and used in multiple places.
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Classes and Inheritance - Archive of obsolete content
a class is a blueprint from which individual objects are created.
...the sdk uses a special constructor internally, known as class, to create constructors that behave properly with respect to inheritance.
...to illustrate this, let's define a simple constructor for a class shape: function shape(x, y) { this.x = x; this.y = y; } we can now use this constructor to create instances of shape: let shape = new shape(2, 3); shape instanceof shape; // => true shape.x; // => 2 shape.y; // => 3 the keyword new tells javascript that we are performing a constructor call.
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/loader - Archive of obsolete content
create commonjs module loaders.
... create somewhat standardized js environments that people doing non-browser js are familiar with.
... create task specific loaders with restricted module access.
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dev/panel - Archive of obsolete content
with the dev/panel module, you can create your own panels in the toolbox: the panel gets a tab in the toolbox toolbar which enables the user to open it: you specify the panel's content and behavior using html, css, and javascript.
... when the panel's created, the framework passes it a debuggee: this is a messageport object that you can use to exchange json messages with the browser that the developer tools are currently debugging.
... optional setup function a function that will be called when the panel is created.
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Layout System Overview - Archive of obsolete content
given a content model, how does the layout system actually create the presentation?
...layout creates frames for content based on either the specific html rules for an element or based on the css display type of the element.
...the layout module looks at the 'display' field of the style context to determine what kind of frame to create (block, inline, table, etc.).
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Monitoring downloads - Archive of obsolete content
in particular, it needs to get an instance of the download manager's nsidownloadmanager interface and create the database into which its data will be stored.
... .get("profd", components.interfaces.nsifile); this.dbfile.append("downloadlogger.sqlite"); // get access to the storage service and open the database this.storageservice = components.classes["@mozilla.org/storage/service;1"] .getservice(components.interfaces.mozistorageservice); var dbconn = this.storageservice.opendatabase(this.dbfile); // now create the table; if it already exists, this fails, but we don't care!
... dbconn.executesimplesql("create table items (source text, size integer," + " starttime integer, endtime integer," + " speed real, status integer)"); dbconn.close(); }, this is fairly simple stuff.
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Windows Media in Netscape - Archive of obsolete content
client-side detection using javascript objects internet explorer implements the activexobject object to create new instances of activex controls.
... netscape 7.1 introduces geckoactivexobject which can be used in a similar way to create instances of the windows media player.
...activexobject both geckoactivexobject and activexobject work very similarly, with one key difference: both take a programmatic id (progid) and use it to create a reference to the windows media player.
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Localizing without a specialized tool
from the create a new localization document, an interested localizer can follow a technical step-by-step process that starts the localization process by focusing on how to localize two of the primary types of localization files (dtd and properties) used in the mozilla source code.
... with that document, users can see immediately two localized files in their user interface by following closely and carefully the steps to create a language pack or a binary file that is ready for installation.
... repeating the process allows a localizer to create a testable package to see his or her work as they progress to a final version.
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Enc Dec MAC Output Public Key as CSR
(pk11symkey *key, unsigned char *iv, unsigned int ivlen, ck_mechanism_type type, ck_attribute_type operation) { secitem ivitem = { sibuffer, iv, ivlen }; pk11context *ctx = null; secitem *secparam = pk11_paramfromiv(type, &ivitem); if (secparam == null) { pr_fprintf(pr_stderr, "crypt failed : secparam null\n"); return null; } ctx = pk11_createcontextbysymkey(type, operation, key, secparam); if (ctx == null) { pr_fprintf(pr_stderr, "crypt failed : can't create a context\n"); goto cleanup; } cleanup: if (secparam) { secitem_freeitem(secparam, pr_true); } return ctx; } /* * common encryption and decryption code */ secstatus crypt(pk11context *ctx, unsigned char *out, unsigned int *outl...
... signalgtag; secitem result; secstatus rv = secsuccess; print32 numbytes; void *exthandle; prarenapool *arena = null; prfiledesc *outfile = null; /* open the certificate request file to write */ outfile = pr_open(certreqfilename, pr_create_file | pr_rdwr | pr_truncate, 00660); if (!outfile) { pr_fprintf(pr_stderr, "unable to open \"%s\" for writing (%ld, %ld).\n", certreqfilename, pr_geterror(), pr_getoserror()); goto cleanup; } /* create info about public key */ spki = seckey_createsubjectpublickeyinfo(pubk); if (!spki) { pr_fprintf(pr_stderr, "unabl...
...e to create subject public key\n"); rv = secfailure; goto cleanup; } /* generate certificate request */ cr = cert_createcertificaterequest(subject, spki, null); if (!cr) { pr_fprintf(pr_stderr, "unable to make certificate request\n"); rv = secfailure; goto cleanup; } arena = port_newarena(der_default_chunksize); if (!arena) { fprintf(stderr, "out of memory"); rv = secfailure; goto cleanup; } exthandle = cert_startcertificaterequestattributes(cr); if (exthandle == null) { port_freearena (arena, pr_false); rv = secfailure; goto cleanup; } cert_finishextensions(exthandle); cert_finishcertificaterequestattributes(cr); /* der encode the request */ en...
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NSS tools : signtool
e [[-c compression level] ] [[-d cert-dir] ] [[-i installer script] ] [[-m metafile] ] [[-x name] ] [[-f filename] ] [[-t|--token tokenname] ] [[-e extension] ] [[-o] ] [[-z] ] [[-x] ] [[--outfile] ] [[--verbose value] ] [[--norecurse] ] [[--leavearc] ] [[-j directory] ] [[-z jarfile] ] [[-o] ] [[-p password] ] [directory-tree] [archive] description the signing tool, signtool, creates digital signatures and uses a java archive (jar) file to associate the signatures with files in a directory.
... before you can use netscape signing tool to sign files, you must have an object-signing certificate, which is a special certificate whose associated private key is used to create digital signatures.
... for testing purposes only, you can create an object-signing certificate with netscape signing tool 1.3.
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Necko Architecture
uris (recall that a url is just one implementation of a uri) can be created as individual components independently of necko, or they can be retrieved via the nsiioservice interface.
...there is a 1-to-1 relationship between uris and channels (if you go so far as to create a channel from a uri, which is not required if all you need is a parsed representation of a uri string).
...a protocol handler's primary responsibility is to create channels for the scheme it has registered to handle.
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Building the WebLock UI
specifically, the user interface we create in this chapter will be overlaid into the statusbar of the browser component, where it will provide a small icon the user can click to access the web lock interface.
...in the following chapter we'll describe how you can take these files and create a package, an installable archive that includes the weblock component and the new ui.
...the second section, xul, describes the xml-based user interface language (xul) and how you can use it to create a dialog that provides access to the weblock component and its services.
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nsIFile
with an nsifile you can navigate to ancestors or descendants without having to deal with the different path separators used on different platforms, query the state of any file or directory at the position represented by the nsifile and create, move or copy items in the filesystem.
... to create an nsifile from a path you can use fileutils.jsm: var fileutils = cu.import("resource://gre/modules/fileutils.jsm").fileutils var nsifile = new fileutils.file( filename ) note: nsilocalfile was merged with this interface in gecko 14.
... void create(in unsigned long type, in unsigned long permissions); void createunique(in unsigned long type, in unsigned long permissions); boolean equals(in nsifile infile); boolean exists(); acstring getrelativedescriptor(in nsifile fromfile); void initwithfile(in nsifile afile); void initwithnativepath(in acstring filepath); void initwithpath(in...
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Using the clipboard
const gclipboardhelper = components.classes["@mozilla.org/widget/clipboardhelper;1"] .getservice(components.interfaces.nsiclipboardhelper); gclipboardhelper.copystring("put me on the clipboard, please."); this example will first create a clipboard helper and then copy a short string to the clipboard.
...the clipboard model in mozilla requires you to perform the following steps to copy data: create an xpcom wrapper for the data which you want to put on the clipboard.
... create a transferring object.
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Debugger.Object - Firefox Developer Tools
spidermonkey creates exactly one debugger.object instance for each debuggee object it presents to a given debugger instance: if the debugger encounters the same object through two different routes (perhaps two functions are called on the same object), spidermonkey presents the same debugger.object instance to the debugger each time.
... while most debugger.object instances are created by spidermonkey in the process of exposing debuggee’s behavior and state to the debugger, the debugger can use debugger.object.prototype.makedebuggeevalue to create debugger.object instances for given debuggee objects, or use debugger.object.prototype.copy and debugger.object.prototype.create to create new objects in debuggee compartments, allocated as if by particular debuggee globals.
... environment if the referent is a function that is debuggee code, a debugger.environment instance representing the lexical environment enclosing the function when it was created.
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RTCPeerConnection - Web APIs
"50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="236" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">rtcpeerconnection</text></a></svg></div> a:hover text { fill: #0095dd; pointer-events: all;} constructorrtcpeerconnection() the rtcpeerconnection() constructor returns a newly-created rtcpeerconnection, which represents a connection between the local device and a remote peer.propertiesalso inherits properties from: eventtargetcantrickleicecandidatesthe read-only rtcpeerconnection property cantrickleicecandidates returns a boolean which indicates whether or not the remote peer can accept trickled ice candidates.connectionstate the read-only connectionstate property of the rtc...
...this event, of type rtcdatachannelevent, is sent when an rtcdatachannel is added to the connection by the remote peer calling createdatachannel().onicecandidatethe rtcpeerconnection property onicecandidate property is an eventhandler which specifies a function to be called when the icecandidate event occurs on an rtcpeerconnection instance.
...instead of using this obsolete method, you should instead use addtrack() once for each track you wish to send to the remote peer.addtrack()the rtcpeerconnection method addtrack() adds a new media track to the set of tracks which will be transmitted to the other peer.close() the rtcpeerconnection.close() method closes the current peer connection.createanswer() the createanswer() method on the rtcpeerconnection interface creates an sdp answer to an offer received from a remote peer during the offer/answer negotiation of a webrtc connection.
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Using readable streams - Web APIs
browser support you can consume fetch body objects as streams and create your own custom readable streams in firefox 65+ and chrome 42+ (and equivalent chromium-based browsers).
...this is done using the readablestream.getreader() method: // fetch the original image fetch('./tortoise.png') // retrieve its body as readablestream .then(response => response.body) .then(body => { const reader = body.getreader(); invoking this method creates a reader and locks it to the stream — no other reader may read this stream until this reader is released, e.g.
...for example, our simple stream pump example goes on to enqueue each chunk in a new, custom readablestream (we will find more about this in the next section), then create a new response out of it, consume it as a blob, create an object url out of that blob using url.createobjecturl(), and then display it on screen in an <img> element, effectively creating a copy of the image we originally fetched.
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Auto-placement in CSS Grid Layout - CSS: Cascading Style Sheets
in addition to the ability to place items accurately onto a created grid, the css grid layout specification contains rules that control what happens when you create a grid and do not place some or all of the child items.
...ffa94d; border-radius: 5px; background-color: #ffd8a8; padding: 1em; color: #d9480f; } .wrapper { display: grid; grid-template-columns: repeat(3, 1fr); grid-gap: 10px; } <div class="wrapper"> <div>one</div> <div>two</div> <div>three</div> <div>four</div> <div>five</div> </div> default rules for auto-placement as you can see with the above example, if you create a grid all child items will lay themselves out one into each grid cell.
...if you have created additional rows using the grid-template-rows property then grid will continue placing items in these rows.
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Using CSS gradients - CSS: Cascading Style Sheets
you can choose between three types of gradients: linear (created with the linear-gradient() function), radial (created with radial-gradient()), and conic (created with the conic-gradient() function).
... you can also create repeating gradients with the repeating-linear-gradient(), repeating-radial-gradient(), and repeating-conic-gradient() functions.
... we'll start by introducing linear gradients, then introduce features that are supported in all gradient types using linear gradients as the example, then move on to radial, conic and repeating gradients using linear gradients a linear gradient creates a band of colors that progress in a straight line.
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Closures - JavaScript
in javascript, closures are created every time a function is created, at function creation time.
... lexical scoping consider the following example code: function init() { var name = 'mozilla'; // name is a local variable created by init function displayname() { // displayname() is the inner function, a closure alert(name); // use variable declared in the parent function } displayname(); } init(); init() creates a local variable called name and a function called displayname().
...this environment consists of any local variables that were in-scope at the time the closure was created.
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Functions - JavaScript
(theobject) { theobject.make = 'toyota'; } var mycar = {make: 'honda', model: 'accord', year: 1998}; var x, y; x = mycar.make; // x gets the value "honda" myfunc(mycar); y = mycar.make; // y gets the value "toyota" // (the make property was changed by the function) function expressions while the function declaration above is syntactically a statement, functions can also be created by a function expression.
... function map(f, a) { let result = []; // create a new array let i; // declare variable for (i = 0; i != a.length; i++) result[i] = f(a[i]); return result; } in the following code, the function receives a function defined by a function expression and executes it for every element of the array received as a second argument.
... function map(f, a) { let result = []; // create a new array let i; // declare variable for (i = 0; i != a.length; i++) result[i] = f(a[i]); return result; } const f = function(x) { return x * x * x; } let numbers = [0, 1, 2, 5, 10]; let cube = map(f,numbers); console.log(cube); function returns: [0, 1, 8, 125, 1000].
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Inheritance and the prototype chain - JavaScript
it should not be confused with the func.prototype property of functions, which instead specifies the [[prototype]] to be assigned to all instances of objects created by the given function when used as a constructor.
... here is what happens when trying to access a property: // let's create an object o from function f with its own properties a and b: let f = function () { this.a = 1; this.b = 2; } let o = new f(); // {a: 1, b: 2} // add properties in f function's prototype f.prototype.b = 3; f.prototype.c = 4; // do not set the prototype f.prototype = {b:3,c:4}; this will break the prototype chain // o.[[prototype]] has properties b and c.
... code link setting a property to an object creates an own property.
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Introduction to using XPath in JavaScript - XPath
the function can be either: created by using the creatensresolver method of a xpathevaluator object.
...specifying null will create a new xpathresult object.
... implementing a default namespace resolver we create a namespace resolver using the creatensresolver method of the document object.
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Creating a Firefox sidebar extension - Archive of obsolete content
a newer document is available: creating a firefox sidebar this article describes how to create a registered sidebar for firefox 2 or greater.
...what we will do is create a sidebar and register it so it will be available in the menu.
...first a simple xul page is created.
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Drag and Drop Example - Archive of obsolete content
dragging elements around here, we'll create a simple board where items from a palette can be dragged onto the board.
... the user can click on one of several xul elements on the palette and drag it onto a stack element to create an element of a particular type.
...the board will be created using a stack element.
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Space Manager Detailed Design - Archive of obsolete content
this frame * created the space manager, and the world coordinate space is * relative to this frame.
...this * creates a new local coordinate space relative to the current * coordinate space.
...((prcliststr*)this);} bandrect* head() const {return (bandrect*)pr_list_head(this);} bandrect* tail() const {return (bandrect*)pr_list_tail(this);} // operations void append(bandrect* abandrect) {pr_append_link(abandrect, this);} // remove and delete all the band rects in the list void clear(); }; frameinfo* getframeinfofor(nsiframe* aframe); frameinfo* createframeinfo(nsiframe* aframe, const nsrect& arect); void destroyframeinfo(frameinfo*); void clearframeinfo(); void clearbandrects(); bandrect* getnextband(const bandrect* abandrect) const; void divideband(bandrect* aband, nscoord abottom); prbool canjoinbands(bandrect* aband, bandrect* aprevband); prbool joinbands(bandrect* aband, bandrect* aprevband)...
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Writing to Files - Archive of obsolete content
to create an output stream, use nsiscriptableio.newoutputstream().
... this method has a number of options to specify text or binary writing, the character set, and whether to append to an existing file or create a new one.
... to create an input stream, first get a reference to a nsifile, and then use nsiscriptableio.newoutputstream() to open a stream for writing to it.
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Beginner's guide to media queries - Learn web development
media queries are a key part of responsive web design, as they allow you to create different layouts depending on the size of the viewport, but they can also be used to detect other things about the environment your site is running on, for example whether the user is using a touchscreen rather than a mouse.
... prerequisites: html basics (study introduction to html), and an idea of how css works (study css first steps and css building blocks.) objective: to understand how to use media queries, and the most common approach for using them to create responsive designs.
... width and height the feature we tend to detect most often in order to create responsive designs (and that has widespread browser support) is viewport width, and we can apply css if the viewport is above or below a certain width — or an exact width — using the min-width, max-width, and width media features.
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Responsive design - Learn web development
historic website layouts at one point in history you had two options when designing a website: you could create a liquid site, which would stretch to fill the browser window or a fixed width site, which would be a fixed size in pixels.
... as the mobile web started to become a reality with the first feature phones, companies who wished to embrace mobile would generally create a special mobile version of their site, with a different url (often something like m.example.com, or example.mobi).
... zoe mickley gillenwater was instrumental in her work to describe and formalize the different ways in which flexible sites could be created, attempting to find a happy medium between filling the screen or being completely fixed in size.
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Manipulating documents - Learn web development
you can use this object to return and manipulate information on the html and css that comprises the document, for example get a reference to an element in the dom, change its text content, apply new styles to it, create new elements and add them to the current element as children, or even delete it altogether.
...this is a "tree structure" representation created by the browser that enables the html structure to be easily accessed by programming languages — for example the browser itself uses it to apply styling and other information to the correct elements as it renders a page, and developers like you can manipulate the dom with javascript after the page has been rendered.
... we have created a simple example page at dom-example.html (see it live also).
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Introduction to automated testing - Learn web development
for example, let's first create a test directory to allow us to play without fear of breaking anything.
... create a new directory somewhere sensible using your file manager ui, or, on a command line, by navigating to the location you want and running the following command: mkdir node-test to make this directory an npm project, you just need to go inside your test directory and initialize it, with the following: cd node-test npm init this second command will ask you many questions to find out the information required to set up the project; you can just select the defaults for now.
... to begin with, create a test npm project using the procedure detailed at the bottom of the previous section.
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Creating Sandboxed HTTP Connections
introduction starting with gecko 1.8.1 (firefox 2), it is possible to create sandboxed http connections which don't affect the user's cookies.
... setting up an http connection the first step in setting up an http connection from an url (stored in a string) is to create an nsiuri out of it.
...to create an nsiuri from an string, we use the newuri method of nsiioservice: // the io service var ioservice = components.classes["@mozilla.org/network/io-service;1"] .getservice(components.interfaces.nsiioservice); // create an nsiuri var uri = ioservice.newuri(myurlstring, null, null); once the nsiuri has been created, a nsichannel can be generated from it using nsiioservice's newchannelfromuri method: // get a channel for that nsiuri var channel = ioservice.newchannelfromuri(uri); to initiate the connection, the asyncopen method is called.
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Necko walkthrough
nsdocshell as an example client of the nsihttpchannel api nsdocshell::loaduri(string) create nsiuri from string nsdocshell::loaduri(nsiuri) creates 2 nsiinputstream for read response from; passes them with uri to ...
... nsdocshell::internalload nsdocshell::douriload opens the nsichannel for the uri (ns_newchannel) if "http:", it will be an nsihttpchannel nsdocshell::dochannelload nsuriloader::openuri passes an nsistreamlistener pointer, 'loader' to nsuriloader::openchannel - it creates an nsdocumentopeninfo object, which implements nsistreamlistener, i.e.
...but the interface for clients of necko is important to consider: send request uri helps creates channel setup channel (headers, request data, response callback...) channel->asyncopen.
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An Overview of XPCOM
but xpcom also provides several tools and libraries that enable the loading and manipulation of these components, services that help the developer write modular cross-platform code, and versioning support, so that components can be replaced or upgraded without breaking or having to recreate the application.
... using xpcom, developers create components that can be reused in different applications or that can be replaced to change the functionality of existing applications.
...in the haste of early mozilla development, components were created where they were inappropriate, but there's been an ongoing effort to remove xpcom from places like this.
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Finishing the Component
« previousnext » at this point you have created most of the infrastructure of the component.
... copying interfaces into your build environment to get and implement interfaces that are not part of gecko in your component, simply create a new directory in the gecko sdk named unfrozen.
...(for weblock, all you need are the headers for nsicontentpolicy and the nsicontentpolicy.idl.) then, using the same steps you used to create the weblock.h, create a header from this idl file using the xpidl compiler.
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nsIHTMLEditor
adddefaultproperty(in nsiatom aproperty, in astring aattribute, in astring avalue); void addinsertionlistener(in nsicontentfilter infilter); void align(in astring aalign); boolean breakisvisible(in nsidomnode anode); boolean candrag(in nsidomevent aevent); void checkselectionstateforanonymousbuttons(in nsiselection aselection); nsidomelement createanonymouselement(in astring atag, in nsidomnode aparentnode, in astring aanonclass, in boolean aiscreatedhidden); nsidomelement createelementwithdefaults(in astring atagname); void decreasefontsize(); void dodrag(in nsidomevent aevent); void getalignment(out boolean amixed, out short aalign); astring getbackgroundcolorstate(out boolean amixed); ...
... returninparagraphcreatesnewparagraph boolean a boolean indicating if a return key pressed in a paragraph creates another paragraph or just inserts a <br> at the caret.
... boolean candrag( in nsidomevent aevent ); parameters aevent return value checkselectionstateforanonymousbuttons() checks if the anonymous nodes created by the html editor have to be refreshed or hidden depending on a possible new state of the selection.
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nsIWindowsRegKey
method overview void close(); void create(in unsigned long rootkey, in astring relpath, in unsigned long mode); nsiwindowsregkey createchild(in astring relpath, in unsigned long mode); astring getchildname(in unsigned long index); astring getvaluename(in unsigned long index); unsigned long getvaluetype(in astring name); boolean haschanged(); boolean haschild(in astring name); ...
... constant value description root_key_classes_root 0x80000000 root_key_current_user 0x80000001 root_key_local_machine 0x80000002 access constants values for the mode parameter passed to the open() and create() methods.
... constant value description access_basic 0x00020000 access_query_value 0x00000001 access_set_value 0x00000002 access_create_sub_key 0x00000004 access_enumerate_sub_keys 0x00000008 access_notify 0x00000010 access_read access_basic | access_query_value | access_enumerate_sub_keys | access_notify access_write access_basic | access_set_value | access_create_sub_key access_all access_read | access_write wow64_32 0x00000200 ...
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Working with data
these are javascript constructors; as such, they're callable functions that you can use to create new cdata objects of that type.
... if type is an array type of unspecified length, the following steps are taken: if the value is a size value, a new array of that length is created, with its cells ready to accept values of the same type as those in the specified array.
... if the type represents a javascript string (that is, an array of jschar characters followed by a null terminator), a copy of that string is created and returned.
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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...
... 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.
... if you are browsing a page that has several embedded realaudio clips, for example, the browser will create as many instances of the realplayer plug-in as are needed (though of course playing several realaudio files at the same time would seldom be a good idea).
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FileSystemDirectoryEntry.getDirectory() - Web APIs
options optional an object based on the filesystemflags dictionary, which allows you to specify whether or not to create the entry if it's missing and if it's an error if the file already exists.
... successcallback optional a method to be called once the filesystemdirectoryentry has been created.
...the fileerror.code specifies what type of error occurred, as follows: fileerror.not_found_err the create option was not specified (or was specified as false), and the directory doesn't exist.
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FileSystemDirectoryEntry.getFile() - Web APIs
options optional an object based on the filesystemflags dictionary, which allows you to specify whether or not to create the entry if it's missing and if it's an error if the file already exists.
... successcallback optional a method to be called once the filesystemfileentry has been created.
...the {domxref("fileerror.code")}} specifies what type of error occurred, as follows: fileerror.not_found_err the create option was not specified (or was specified as false), and the file doesn't exist.
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Using bounded reference spaces - Web APIs
it's difficult (and would probably be fairly confusing) to create a virtual world that's larger than the physical space available to the user if you're mapping their real-world movement into the virtual environment.
...in this section, we'll look at how to safely create a session that will work whether bounded spaces are supported or not.
... safely creating a bounded-preferred space before actually attempting to create a bounded reference space, you need to create a session that supports them.
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Starting up and shutting down a WebXR session - Web APIs
before you can begin to render your augmented or virtual reality scenario, you need to create and set up the webxr session, and you should know how to shut it down properly as well.
... webxr api emulator extension the mozilla webxr team has created a webxr api emulator browser extension, compatible with both firefox and chrome, which emulates the webxr api, simulating a variety of compatible devices such as the htc vive, the oculus go and oculus quest, samsung gear, and google cardboard.
... confirming the session type you need is available before trying to create a new webxr session, it's often wise to first check to see if the user's hardware and software support the presentation mode you wish to use.
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Using the Web Audio API - Web APIs
because of this modular design, you can create complex audio functions with dynamic effects.
... audio context to be able to do anything with the web audio api, we need to create an instance of the audio context.
...a baseaudiocontext is created for us automatically and extended to an online audio context.
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Web Audio API - Web APIs
the web audio api provides a powerful and versatile system for controlling audio on the web, allowing developers to choose audio sources, add effects to audio, create audio visualizations, apply spatial effects (such as panning) and much more.
...this modular design provides the flexibility to create complex audio functions with dynamic effects.
... a simple, typical workflow for web audio would look something like this: create audio context inside the context, create sources — such as <audio>, oscillator, stream create effects nodes, such as reverb, biquad filter, panner, compressor choose final destination of audio, for example your system speakers connect the sources up to the effects, and the effects to the destination.
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Error - JavaScript
description runtime errors result in new error objects being created and thrown.
... evalerror creates an instance representing an error that occurs regarding the global function eval().
... internalerror creates an instance representing an error that occurs when an internal error in the javascript engine is thrown.
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Object.prototype.constructor - JavaScript
the constructor property returns a reference to the object constructor function that created the instance object.
... description all objects (with the exception of objects created with object.create(null)) will have a constructor property.
... objects created without the explicit use of a constructor function (such as object- and array-literals) will have a constructor property that points to the fundamental object constructor type for that object.
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Object - JavaScript
objects can be created using the object() constructor or the object initializer / literal syntax.
...however, an object may be deliberately created for which this is not true (e.g.
... by object.create(null)), or it may be altered so that this is no longer true (e.g.
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widget - Archive of obsolete content
create a simple user interface for an add-on in firefox's add-on bar.
...in the add-on's "main.js" file, we create the widget, assign it the html file and the content script, and listen for events from the content script: const widgets = require("sdk/widget"); const data = require("sdk/self").data; var player = widgets.widget({ id: "player", width: 72, label: "player", contenturl: data.url("buttons.html"), contentscriptfile: data.url("button-script.js") }); player.port.on("play", function() { c...
... examples for conciseness, these examples create their content scripts as strings and use the contentscript property.
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Custom XUL Elements with XBL - Archive of obsolete content
this somewhat cryptic explanation describes a very simple concept: with xbl you can create your own custom elements.
... xbl basics in order to create an xbl binding you'll need 2 files: the xbl file and a css file that binds an element name to your xbl declaration.
...it holds all the code necessary to control the new element we created.
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Appendix E: DOM Building and Insertion (HTML & XUL) - Archive of obsolete content
the following methods will all safely create a dom tree without risk of remote execution.
... if (array.isarray(elemnameorarray)) { var frag = doc.createdocumentfragment(); array.foreach(arguments, function(thiselem) { frag.appendchild(tag.apply(null, thiselem)); }); return frag; } // single element?
... parse element namespace prefix (if none exists, default to defaultnamespace), and create element var elemns = namespace(elemnameorarray); var elem = doc.createelementns(elemns.namespace || jsontodom.defaultnamespace, elemns.shortname); // set element's attributes and/or callback functions (eg.
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A XUL Bestiary - Archive of obsolete content
this special option allows you to create and access chromes independent of the mozilla browser and begins to suggest some possibilities for xul-as-platform beyond the simple restyling of the browser.
...when you create different chrome for a package, you can create a subdirectory underneath content whose contents are loaded instead of default.
... for example, if you want to create a different skin for the navigator package, you can create a subdirectory underneath navigator/skin/ whose contents will be loaded instead of default's.
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Menus - Archive of obsolete content
menu types a menu is created using the menupopup tag.
...these tags can be used to create menus which sit on a menubar or are attached to buttons.
... submenus may be created by nesting one menu inside of another.
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Skinning XUL Files by Hand - Archive of obsolete content
in xul, skins are created with cascading style sheets and images.
...following the instructions here, you are going to create a skin for a xul file and apply it by specifying classes for all of the interested elements.
...the ability to apply styles to elements of a type, to specifically identified elements, and to classes of elements creates the potential for redundancies or conflicts in the style information.
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Building a Theme - Archive of obsolete content
an example of the content within a typical xpi file for a theme: example.xpi: /install.rdf /chrome.manifest /preview.png /icon.png /chrome/ browser/ communicator/ global/ mozapps/ we'll want to create a file structure similar to the one above for our tutorial, so let's begin by creating a folder for your theme somewhere on your hard disk (e.g.
...inside your new theme folder, create two new empty text files, one called chrome.manifest and the other called install.rdf.
...first, you'll want to create a directory somewhere.
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Building up a basic demo with Babylon.js - Game development
we will try to create a simple demo first — a cube rendered on the screen.
... initialising the babylon.js engine we have to create a babylon.js engine instance first (passing it the <canvas> element to render on) before we start developing our game.
...let's create a scene by adding the following lines just below our previous code: var scene = new babylon.scene(engine); scene.clearcolor = new babylon.color3(0.8, 0.8, 0.8); thus, the scene is created and the second line sets the background color to light gray.
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Building up a basic demo with PlayCanvas editor - Game development
here's what the page looks like — you can create projects and manage them, change their settings etc.
... click create to have it created.
...by clicking the editor button we'll launch the online playcanvas editor where we'll create our scene with the shapes.
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Cooperative asynchronous JavaScript: Timeouts and intervals - Learn web development
universe'); clearing timeouts finally, if a timeout has been created, you can cancel it before the specified time has elapsed by calling cleartimeout(), passing it the identifier of the settimeout() call as a parameter.
...the following function creates a new date() object, extracts a time string out of it using tolocaletimestring(), and then displays it in the ui.
... it then runs the function once per second using setinterval(), creating the effect of a digital clock that updates once per second (see this live, and also see the source): function displaytime() { let date = new date(); let time = date.tolocaletimestring(); document.getelementbyid('demo').textcontent = time; } const createclock = setinterval(displaytime, 1000); just like settimeout(), setinterval() returns an identifying value you can use later when you need to clear the interval.
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Working with JSON - Learn web development
objective: to understand how to work with data stored in json, and create your own json objects.
...add the following at the bottom of your javascript code: let requesturl = 'https://mdn.github.io/learning-area/javascript/oojs/json/superheroes.json'; to create a request, we need to create a new request object instance from the xmlhttprequest constructor, using the new keyword.
...we are then passing that object to two function calls — the first one fills the <header> with the correct data, while the second one creates an information card for each hero on the team, and inserts it into the <section>.
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Object prototypes - Learn web development
in this example, we have defined a constructor function, like so: function person(first, last, age, gender, interests) { // property and method definitions this.name = { 'first': first, 'last' : last }; this.age = age; this.gender = gender; //...see link in summary above for full definition } we have then created an object instance like this: let person1 = new person('bob', 'smith', 32, 'male', ['music', 'skiing']); if you type "person1." into your javascript console, you should see the browser try to auto-complete this with the member names available on this object: in this list, you will see the members defined on person1's constructor — person() — name, age, gender, interests, bio, and greeti...
... so object.prototype.tostring(), object.prototype.valueof(), etc., are available to any object types that inherit from object.prototype, including new object instances created from the person() constructor.
...these all have a number of members defined on their prototype, which is why for example when you create a string, like this: let mystring = 'this is my string.'; mystring immediately has a number of useful methods available on it, like split(), indexof(), replace(), etc.
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Introduction to client-side frameworks - Learn web development
that could look something like this: function buildtodoitemel(id, name) { const item = document.createelement('li'); const span = document.createelement('span'); const textcontent = document.createtextnode(name); span.appendchild(textcontent) item.id = id; item.appendchild(span); item.appendchild(builddeletebuttonel(id)); return item; } here, we use the document.createelement() method to make our <li>, and several more lines of code to create the properties and children it needs.
...it follows a similar pattern to the one we used to build a list item element: function builddeletebuttonel(id) { const button = document.createelement('button'); const textcontent = document.createtextnode('delete'); button.setattribute('type', 'button'); button.appendchild(textcontent); return button; } this button doesn't do anything yet, but it will later once we decide to implement our delete feature.
... the code that will render our items on the page might read something like this: function rendertodolist() { const frag = document.createdocumentfragment(); state.tasks.foreach(task => { const item = buildtodoitemel(task.id, task.name); frag.appendchild(item); }); while (todolistel.firstchild) { todolistel.removechild(todolistel.firstchild); } todolistel.appendchild(frag); } we've now got well over thirty lines of code dedicated just to the ui – just to the step of rendering something in the dom – and at no point do we add classes that we could use later to style our list-items!
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Eclipse CDT
then, to create the eclipse project and open it, run: ./mach ide eclipse or to create the eclipse project without opening it yet, run: ./mach build-backend -b cppeclipse building the eclipse project should only take a few seconds.
...be aware that when eclipse gives results for any of the actions that follow, it will not include results for sections of the code that are ifdef'ed out by the configuration used to create your object directory.
...it also used to be necessary to add the following two lines to your mozconfig to make the compiler output errors all on a single line, but that may not be needed anymore: export cflags="-fmessage-length=0" export cppflags="-fmessage-length=0" debugging to create a debug configuration, open the project properties window, and select "run/debug settings" on the left.
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Creating localizable web applications
so in order to display a localized label of a category or a tab, you should create a mapping between the non-localizable english names used in the urls and the localizable english strings used in the interface.
...good: <h3> <?printf( /* l10n: %s is the author's username */ _("created by <a href=\"%s\">%s</a>"), $locale_conf->url('/gallery/designer/' .
..."</a> : how to create personas"), $locale_conf->url('/'));?> snippet 2.
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AsyncTestUtils extended framework
if you need to wrap an existing url listener or need a callback or fancy promise, create an instance of asyncurllistener.
... synthetic message sets the code that creates synthetic message sets returns instances of the syntheticmessageset class.
... create a single folder with messages in it let [folder, set1, set2, ...] = make_folder_with_sets([asynsetdef1, asynsetdef2, ...]); yield wait_for_message_injection(); this creates a folder with an automatically generated name and adds one or more sets of messages to it.
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Places Developer Guide
fuel - a collection of wrapper apis for easing access to a number of firefox utilities and services nsiplacestransactionsservice - a firefox service for modifying bookmarks in a transactional manner, providing facilities for undo/redo places utilities for javascript - accessors and helper functions for firefox and extensions creating bookmarks, folders and other items creating a bookmark // create an nsiuri for the url to be bookmarked.
... creating a folder var folderid = bookmarks.createfolder( bookmarks.toolbarfolder, // the id of the folder the new folder will be placed in.
... creating a livemark var ioservice = cc["@mozilla.org/network/io-service;1"] .getservice(ci.nsiioservice); var siteuri = ioservice.newuri("http://www.mozilla.com", null, null); var feeduri = ioservice.newuri("http://www.mozilla.org/news.rdf", null, null); var livemarks = cc["@mozilla.org/browser/livemark-service;2"] .getservice(ci.nsilivemarkservice); livemarks.createlivemark(bookmarks.toolbarfolder, // the id of the folder the livemark will be placed in "my livemark title", // the title of the livemark siteuri, // the uri of the site.
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Using the Places livemark service
the livemark service, offered by the nsilivemarkservice interface, is used to create, edit, and reload livemarks.
... initiating the livemark service before using the livemark service, you need to obtain an instance: var livemarkservice = components.classes["@mozilla.org/browser/livemark-service;2"] .getservice(components.interfaces.nsilivemarkservice); creating a new livemark the nsilivemarkservice.createlivemark() method creates a new livemark.
... var newlvmkid = livemarkservice.createlivemark(parentfolderid, "livemark name", uri("http://example.com/"), uri("http://example.com/rss.xml"), -1); the first parameter is the id of the folder in which to create the livemark.
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Avoiding leaks in JavaScript XPCOM components
this tends to be solved in one of two ways: either break the cycle at some point or ensure that the cycle is never created in the first place by making one of the pointers not own a reference (which carries the potential for crashes just like malloc and free).
...however, in a fully garbage-collected system the programmer can still create leaks by leaving objects reachable that are no longer needed.
...if you implement nsiobserver in javascript and register that observer (without using weak references) with a service (for example, with the observer service bug 239833 or with the pref service bug 256822), the service will do exactly what you tell it to do: notify the observer you just created until you unregister the observer.
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Mozilla internal string guide
there are also a number of concrete classes that are created as a side-effect of helper routines, etc.
...let the string library create the class for you.
... nssubstringtuple - created via string concatenation nsdependentsubstring - created through substring nspromiseflatstring - created through promiseflatstring() nsliteral[c]string - created through the ""_ns and u""_ns user-defined literals of course, there are times when it is necessary to reference these string classes in your code, but as a general rule they should be avoided.
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mozIStorageFunction
objects implementing this interface can be registered with mozistorageconnection.createfunction().
...this is called by the database engine when the function registered with mozistorageconnection.createfunction() is used in an executing sql statement or trigger.
... javascript starting in gecko 1.9.1.4 (firefox 3.0.15), you can directly pass your function into the mozistorageconnection method mozistorageconnection, like this: dbconn.createfunction("square", 1, function(aarguments) { let value = aarguments.getint32(0); return value * value; }); // run some query that uses the function.
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nsIMsgDatabase
last changed in gecko 1.9 (firefox 3) inherits from: nsidbchangeannouncer method overview void open(in nsilocalfile afoldername, in boolean acreate, in boolean aleaveinvaliddb); void forcefolderdbclosed(in nsimsgfolder afolder); void close(in boolean aforcecommit); void commit(in nsmsgdbcommit committype); void forceclosed(); void clearcachedhdrs; void resethdrcachesize(in unsigned long size); nsimsgdbhdr getmsghdrforkey(in nsmsgkey key); nsimsgdbhdr getmsghdrformessageid(in string messageid); boolean containskey(in nsmsgkey key); nsimsgdbhdr createnewhdr(in nsmsgkey key)...
...smsgkey key, in boolean deleted, in nsidbchangelistener instigator); void applyretentionsettings(in nsimsgretentionsettings amsgretentionsettings, in boolean adeleteviafolder); boolean hasnew(); void clearnewlist(in boolean notify); void addtonewlist(in nsmsgkey key); void startbatch(); void endbatch(); nsimsgofflineimapoperation getofflineopforkey(in nsmsgkey messagekey, in boolean create); void removeofflineop(in nsimsgofflineimapoperation op); nsisimpleenumerator enumerateofflineops(); void listallofflineopids(in nsmsgkeyarrayptr offlineopids); native code only!
... void setattributesonpendinghdr(in nsimsgdbhdr pendinghdr, in string property, in string propertyval, in long flags); void createcollationkey(in astring sourcestring, out octetptr key, out unsigned long len); native code only!
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Initialization and Destruction - Plugins
instance creation: the browser calls the plug-in api function npp_new when the instance is created.
... initialization the browser calls np_initialize when a plug-in is loaded and before the first instance is created.
... during initialization, when the browser encounters data of a mime type registered for a plug-in (either embedded in an html page or in a separate file), it loads the plug-in code into memory (if it hasn't been loaded already) and creates a new instance of the plug-in.
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Background Tasks API - Web APIs
window.requestidlecallback = window.requestidlecallback || function(handler) { let starttime = date.now(); return settimeout(function() { handler({ didtimeout: false, timeremaining: function() { return math.max(0, 50.0 - (date.now() - starttime)); } }); }, 1); } if window.requestidlecallback is undefined, we create it here.
... the implementation of our shim for cancelidlecallback() is much simpler: window.cancelidlecallback = window.cancelidlecallback || function(id) { cleartimeout(id); } if cancelidlecallback() isn't defined, this creates one which simply passes the specified callback id through to cleartimeout().
...these elements are: totaltaskcountelem is the <span> we use to insert the total number of tasks created into the status display in the progress box.
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Using the CSS Painting API - Web APIs
to programmatically create an image used by a css stylesheet we need to work through a few steps: define a paint worklet using the registerpaint() function register the worklet include the paint() css function to elaborate over these steps, we're going to start by creating a half-highlight background, like on this header: css paint worklet in an external script file, we employ the registerpaint() function to name our css paint worklet.
... we define the fillstyle as being hsla(55, 90%, 60%, 1.0), which is a shade of yellow, and then call fillrect() to create a rectangle of that color.
... we can use the css background-size and background-position properties to re-size or relocate this background image, but this is the default size and placement of the yellow box we created in our paint worklet.
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Drawing shapes with canvas - Web APIs
all other shapes must be created by combining one or more paths.
...the clearrect() function then erases a 60x60 pixel square from the center, and then strokerect() is called to create a rectangular outline 50x50 pixels within the cleared square.
...to make shapes using paths, we take some extra steps: first, you create the path.
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Introduction to the DOM - Web APIs
we'll look at how the dom represents an html or xml document in memory and how you use apis to create web content and applications.
... when you create a script–whether it's inline in a <script> element or included in the web page by means of a script loading instruction–you can immediately begin using the api for the document or window elements to manipulate the document itself or to get at the children of that document, which are the various elements in the web page.
... your dom programming may be something as simple as the following, which displays an alert message by using the alert() function from the window object, or it may use more sophisticated dom methods to actually create new content, as in the longer example below.
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WebGL model view projection - Web APIs
the code below will create 2 triangles that will draw a square on the screen.
... webglbox example this example will create a custom webglbox object that will draw a 2d box on the screen.
... webglbox constructor the constructor looks like this: function webglbox() { // setup the canvas and webgl context this.canvas = document.getelementbyid('canvas'); this.canvas.width = window.innerwidth; this.canvas.height = window.innerheight; this.gl = mdn.createcontext(canvas); var gl = this.gl; // setup a webgl program, anything part of the mdn object is defined outside of this article this.webglprogram = mdn.createwebglprogramfromids(gl, 'vertex-shader', 'fragment-shader'); gl.useprogram(this.webglprogram); // save the attribute and uniform locations this.positionlocation = gl.getattriblocation(this.webglprogram, 'position'); this.colo...
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WebRTC connectivity - Web APIs
this article describes how the various webrtc-related protocols interact with one another in order to create a connection and transfer data and/or media among peers.
... signaling unfortunately, webrtc can’t create connections without some sort of server in the middle.
... peer a who will be the initiator of the connection, will create an offer.
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Grid template areas - CSS: Cascading Style Sheets
for example, if i wish to create the layout shown below i can identify four main areas.
...this will not yet create any layout, but we now have named areas to use in a layout.
... .header { grid-area: hd; } .footer { grid-area: ft; } .content { grid-area: main; } .sidebar { grid-area: sd; } having defined these names i then create my layout.
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Realizing common layouts using CSS Grid Layout - CSS: Cascading Style Sheets
i am going to create this layout using the named template areas that we learned about in the guide grid template areas.
...we go to a two column layout, and then to a three column layout by redefining the grid, and the placement of items on the grid.</p> </article> <aside class="side">sidebar</aside> <div class="ad">advertising</div> <footer class="main-footer">the footer</footer> </div> as we are using grid-template-areas to create the layout.
... .main-head { grid-area: header; } .content { grid-area: content; } .main-nav { grid-area: nav; } .side { grid-area: sidebar; } .ad { grid-area: ad; } .main-footer { grid-area: footer; } this will not create any layout, however our items now have names we can use to do so.
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Adapting to the new two-value syntax of display - CSS: Cascading Style Sheets
as an example, when we use display: flex we create a block-level container, with flex children.
... we can create inline flex containers.
... if you create a flex container using the single value of inline-flex you will have an inline-level box with flex children.
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position - CSS: Cascading Style Sheets
this value creates a new stacking context when the value of z-index is not auto.
... absolute the element is removed from the normal document flow, and no space is created for the element in the page layout.
... this value creates a new stacking context when the value of z-index is not auto.
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Audio and Video Delivery - Developer guides
a <video> element, or document.createelement('video') perhaps?) deliver the media file to the player.
... 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.
...'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.
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new operator - JavaScript
the new operator lets developers create an instance of a user-defined object type or of one of the built-in object types that has a constructor function.
... description the new keyword does the following things: creates a blank, plain javascript object; links (sets the constructor of) this object to another object; passes the newly created object from step 1 as the this context; returns this if the function doesn't return an object.
... create an instance of the object with new.
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Paths - SVG: Scalable Vector Graphics
it can be used to create lines, curves, arcs, and more.
... paths create complex shapes by combining multiple straight lines or curved lines.
... complex shapes composed only of straight lines can be created as <polyline>s.
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Using custom elements - Web Components
one of the key features of the web components standard is the ability to create custom elements that encapsulate your functionality on an html page, rather than having to make do with a long, nested batch of elements that together provide a custom page feature.
...for example <popup-info>, or document.createelement("popup-info").
...to create one of these, you have to specify which element they extend (as implied in the examples above), and they are used by writing out the basic element but specifying the name of the custom element in the is attribute (or property).
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panel - Archive of obsolete content
creates transient dialogs to implement part of an add-on's user interface.
... 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.
... opening a panel will close any panel created by the panel() constructor that is already open, even if that panel was opened by a different add-on sdk based extension.
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How to convert an overlay extension to restartless - Archive of obsolete content
mport("resource://gre/modules/addonmanager.jsm"); addonmanager.getaddonbyid(myaddonid,function(addon) { var file = services.io.newuri("resource://myaddon/filename.ext",null,null) .queryinterface(components.interfaces.nsifileurl) .file; var stream = components.classes["@mozilla.org/network/file-input-stream;1"] .createinstance(components.interfaces.nsifileinputstream) .queryinterface(components.interfaces.nsiseekablestream); stream.init(file, 0x01, 0444, 0); // read-only, read by owner/group/others, normal behavior /* do stuff */ }); this bit of code is paraphrased and probably not to be recommended as-is, but it should work.
... step 3a: option 1: use nsizipreader let zipreader = components.classes["@mozilla.org/libjar/zip-reader;1"] .createinstance(components.interfaces.nsizipreader); zipreader.open(addondata.installpath); ...
...xmlhttprequest is an api created by microsoft, adopted by mozilla and other vendors, and hacked into a swiss army knife of file loading.
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Creating a Help Content Pack - Archive of obsolete content
original doc: http://www.mozilla.org/projects/help.../content_packs i hesitate to call it "original", tho, because i've basically rewritten the entire thing so that it's easier and faster to use to create help content.
...you can create a content packs which inherit from existing mozilla help content packs.
... open up your favorite text editor and create the file content-pack.rdf.
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Menu - Archive of obsolete content
features can also create new menus and attach them almost anywhere, chrome or content, as popup menus or context menus.
...because it is still under development, the api currently lives in the future and must be imported before it is used: jetpack.future.import("menu"); menus all menus in jetpack are jetpack.menu objects, including both built-in firefox menus and menus that features create.
... to create a new menu, use one of the jetpack.menu constructors below.
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jspage - Archive of obsolete content
flash=(function(){var a=($try(function(){return navigator.plugins["shockwave flash"].description; },function(){return new activexobject("shockwaveflash.shockwaveflash").getvariable("$version");})||"0 r0").match(/\d+/g);return{version:parseint(a[0]||0+"."+a[1],10)||0,build:parseint(a[2],10)||0}; })();function $exec(b){if(!b){return b;}if(window.execscript){window.execscript(b);}else{var a=document.createelement("script");a.setattribute("type","text/javascript"); a[(browser.engine.webkit&&browser.engine.version<420)?"innertext":"text"]=b;document.head.appendchild(a);document.head.removechild(a);}return b;}native.uid=1; var $uid=(browser.engine.trident)?function(a){return(a.uid||(a.uid=[native.uid++]))[0];}:function(a){return a.uid||(a.uid=native.uid++);};var window=new native({name:"window",legacy...
...:(browser.engine.trident)?null:window.window,initialize:function(a){$uid(a); if(!a.element){a.element=$empty;if(browser.engine.webkit){a.document.createelement("iframe");}a.element.prototype=(browser.engine.webkit)?window["[[domelement.prototype]]"]:{}; }a.document.window=a;return $extend(a,window.prototype);},afterimplement:function(b,a){window[b]=window.prototype[b]=a;}});window.prototype={$family:{name:"window"}}; new 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.windo...
...(function(c){if(c.length==1){c+=c;}return c.toint(16);});return(b)?a:"rgb("+a+")"; },rgbtohex:function(d){if(this.length<3){return null;}if(this.length==4&&this[3]==0&&!d){return"transparent";}var b=[];for(var a=0;a<3;a++){var c=(this[a]-0).tostring(16); b.push((c.length==1)?"0"+c:c);}return(d)?b:"#"+b.join("");}});function.implement({extend:function(a){for(var b in a){this[b]=a[b];}return this;},create:function(b){var a=this; b=b||{};return function(d){var c=b.arguments;c=(c!=undefined)?$splat(c):array.slice(arguments,(b.event)?1:0);if(b.event){c=[d||window.event].extend(c); }var e=function(){return a.apply(b.bind||null,c);};if(b.delay){return settimeout(e,b.delay);}if(b.periodical){return setinterval(e,b.periodical);}if(b.attempt){return $try(e); }return e();};},run:function(a,b){return this.a...
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The life of an HTML HTTP request - Archive of obsolete content
this factory is then told to create a nsicontentviewer.
... the factory creates a contentviewer.
... in most cases (including this) it also creates a nsidocument (nshtmldocument) and binds it to the contentviewer.
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Creating XPI Installer Modules - Archive of obsolete content
in the package you create in this tutorial, for example, all of the resources are located under the content/ subdirectory, but they could just as easily have been archived directly at the top--along with skin and locale resources, if you wanted.
...once you have created a package like the one described here, mozilla users can download and install it in a single step.
...developing the resources needless to say, one of the first things you will have to create is the actual software you wish to make redistributable.
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Install script template - Archive of obsolete content
nsfolder, null); if (errblock1!=0) { logcomment("could not add " + component_file + " to " + pluginsfolder + ":" + errblock1); cancelinstall(errblock1); } } else { logcomment("cancelling current browser install due to lack of space..."); cancellinstall(); } // secondary install block, which sets up plugins and xpt in another location in addition to the current browser errblock2 = createsecondaryinstall(); // performinstall block, in which error conditions from previous blocks are checked.
... * * @param empty param list **/ function createsecondaryinstall() { // use getfolder in such a way that it creates c:\winnt\system32\myplugin secondaryfolder = getfolder("win system", company_name); // if secondaryfolder is null, then there has been an error if(!secondaryfolder) return nosecondaryinstall; else { // we have admin privileges to write to the win system directory // so we will set up dll and xpt in their new home ...
...) { logcomment("moz registerplid: rootkey=="+hkey_current_user); winreg.setrootkey(winreg.hkey_current_user); } else { logcomment("moz registerplid: invalid rootkey, "+rootkey); return invalidrootkeyerror; } if (!winreg.iskeywritable(plidpath)) { logcomment("moz registerplid: registry key not writable"); return registrykeynotwritableerror; } // if we can't find the plidpath create the key if (!winreg.keyexists(plidpath)) { logcomment("moz registerplid: creating missing key "+plidpath+"."); myregstatus = winreg.createkey(plidpath, ""); if (myregstatus != 0) { logcomment("moz registerplid: could not create the key, "+plidpath+"as expected.
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Content Panels - Archive of obsolete content
you could create a wizard interface by opening a different window for each screen.
...note that xul does have a wizard element which may be used to create wizard interfaces.
...it creates a separate document within the window.
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Back to the Server: Server-Side JavaScript On The Rise - Archive of obsolete content
listing 1 - querying a mysql database from rhino // import the java sql packages importpackage( java.sql ); // load the mysql driver java.lang.class.forname( "com.mysql.jdbc.driver" ); // create connection to the database var conn = drivermanager.getconnection( "jdbc:mysql://localhost/rhino", "urhino", "prhino" ); // create a statement handle var stmt = conn.createstatement(); // get a resultset var rs = stmt.executequery( "select * from employee" ); // get the metadata from the resultset var meta = rs.getmetadata(); // loop over the records, dump out column names and values while( r...
...this creates a strict separation of the two environments.
...heet"/> <script src="/jaxer_examples/js/ext-2.1/adapter/ext/ext-base.js"/> <script src="/jaxer_examples/js/ext-2.1/ext-all.js"/> <link href="/jaxer_examples/css/main.css" type="text/css" rel="stylesheet"/> <script runat="both" src="/jaxer_examples/js/validatecomments.js"/> <script> var txt_name; var txt_email; var txt_message; var btn_comments; var form_comments; ext.onready( function() { // create the name text field txt_name = new ext.form.textfield({ name: "name", fieldlabel: "name", width: 200 }); // create the e-mail text field txt_email = new ext.form.textfield({ name: "email", fieldlabel: "e-mail", width: 200 }); // create the message text field txt_message = new ext.form.textarea({ name: "message", fieldlabel: "message", width: 200 }); // create a butto...
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Index - Game development
streamlining cross device differences creates multiple challenges, not least when providing appropriate controls for different contexts.
... 42 2d breakout game using phaser 2d, beginner, canvas, games, javascript, phaser, tutorial in this step-by-step tutorial, we create a simple mobile mdn breakout game written in javascript, using the phaser framework.
...let's explore how to create a group of bricks and print them on screen using a loop.
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Basic native form controls - Learn web development
all rich text editors you'll encounter are custom widgets created with html, css, and javascript.
... single line text fields a single line text field is created using an <input> element whose type attribute value is set to text, or by omitting the type attribute altogether (text is the default value).
...this is used to create a form control that is invisible to the user, but is still sent to the server along with the rest of the form data once submitted — for example you might want to submit a timestamp to the server stating when an order was placed.
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Introduction to web APIs - Learn web development
application programming interfaces (apis) are constructs made available in programming languages to allow developers to create complex functionality more easily.
... apis for drawing and manipulating graphics are now widely supported in browsers — the most popular ones are canvas and webgl, which allow you to programmatically update the pixel data contained in an html <canvas> element to create 2d and 3d scenes.
... for example, you might draw shapes such as rectangles or circles, import an image onto the canvas, and apply a filter to it such as sepia or grayscale using the canvas api, or create a complex 3d scene with lighting and textures using webgl.
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Third-party APIs - Learn web development
const audiosource = audioctx.createmediaelementsource(audioelement); // etc.
...in this case we specify the coordinates of the center of the map, a map layer of type map to show (created using the mapquest.tilelayer() method), and the default zoom level.
... next, you need to go to the mapquest developer site, create an account, and then create a developer key to use with your example.
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Arrays - Learn web development
here we look at why this is useful, then explore how to create an array, retrieve, add, and remove items stored in an array, and more besides.
...for example: let sequence = [1, 1, 2, 3, 5, 8, 13]; let random = ['tree', 795, [0, 1, 2]]; before proceeding, create a few example arrays.
...first, create a string in your console: let mydata = 'manchester,london,liverpool,birmingham,leeds,carlisle'; now let's split it at each comma: let myarray = mydata.split(','); myarray; finally, try finding the length of your new array, and retrieving some items from it: myarray.length; myarray[0]; // the first item in the array myarray[1]; // the second item in the array myarray[myarray.length-1];...
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Starting our Svelte Todo list app - Learn web development
in this article we will first have a look at the desired functionality of our app, then we'll create a todos.svelte component and put static markup and styles in place, leaving everything ready to start developing our to-do list app features, which we'll go on to in subsequent articles.
... objective: to learn how to create a svelte component, render it inside another component, pass data into it using props, and save its state.
... building our first component let's create a todos.svelte component — this will contain our list of todos.
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TypeScript support in Svelte - Learn web development
all you have to do is run the following terminal commands (run them somewhere where you are storing your svelte test projects — it creates a new directory): npx degit sveltejs/template svelte-typescript-app cd svelte-typescript-app node scripts/setuptypescript.js this creates a starter project that includes typescript support, which you can then modify as you wish.
... inside the src folder create a types folder.
... create a filter.enum.ts file in the types folder.
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Introducing a complete toolchain - Learn web development
you will need to create accounts with each of github and netlify if you wish to complete the tutorial.
... once you've signed up for github (click the sign up link on the homepage if you don't already have an account, and follow the instructions), you can use your github account for authentication on netlify (click sign up, then choose github from the "sign up with one of the following" list), so technically you only need to create one new account.
... using the command line, we can create the project, install the initial tooling, and create rudimentary configuration files.
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Theme concepts
these theme options can be implemented as static themes (although the theme images themselves may be animated) or as dynamic themes created in a browser extension.
... you can also use the theme generator on amo to create a static theme.
... defining a theme to create a theme (in this example a simple, single image theme): create a folder in a suitable location on your computer.
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Creating reftest-based unit tests
so, if the effect of complex markup is being tested, put that complex markup into a page and create another page that uses simple markup to achieve the same visual effect.
...create a directory (inside firefox's source code tree) and make that your current directory (i.e.
... step 3 create a file named foo.html with the following: <html><head><title>reftest0001</title> <body><strong>hello!</strong></body> </html> step 4 create a file named bar.html with the following: <html><head><title>reftest0001</title> <body><b>hello!</b></body> </html> step 5 create a file named reftest.list with the following: == foo.html bar.html you are now ready to run the test (but first you must go back to the root of firefox's source code tree): $ ./mach reftest path/to/reftest.list 2>&1 | grep reftest reftest pass: file:///users/ray/mozilla-central/path/to/foo.html $ congratulations!
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Debugging on Mac OS X
creating an xcode project if you try to create a new xcode project in an existing directory then xcode will delete its existing contents (xcode will warn you beforehand).
... these steps were last updated for xcode 10.3: open xcode, and create a new project with file > new project.
...create/select a temporary directory to contain the project and then click create.
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Displaying Places information using views
tree view create a built-in tree view by setting the type attribute to "places" on a tree element.
... in firefox 3.6 and earlier requires gecko 1.9.2(firefox 3.6 / thunderbird 3.1 / fennec 1.0) create a built-in menu view by setting the type attribute to "places" on an empty menupopup element (which would be a child of some parent menu element): <menu> <menupopup type="places" /> </menu> the place attribute or property should be set on the menupopup as well.
... toolbar view create a built-in toolbar view by setting the type attribute to "places" on an empty hbox element (which would be a child of some parent toolbaritem element, itself the child of a toolbar element): <toolbar> <toolbaritem> <hbox type="places" /> </toolbaritem> </toolbar> the place attribute or property should be set on the hbox as well.
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Error codes returned by Mozilla APIs
ns_error_file_unknown_type (0x80520004) an call was made to nsifile.create() with an invalid type.
... ns_error_file_already_exists (0x80520008) an attempt was made to create a file that already exists.
... ns_error_file_too_big (0x8052000f) this error occurs when nsifile.createunique() cannot create a file with a unique filename.
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Bootstrapping a new locale
(see also https://developer.mozilla.org/en/create_a_new_localization) the documentation here is no longer being maintained and is inaccurate.
... create a bare-bones localization next, create a base localization.
...you will need to create an account so you can access the service.
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NSS API Guidelines
the certdb library manipulates the certificate database (add, create, delete certificates and crls).
... it also provides general certificate-handling routines (create a certificate, verify, add/check certificate extensions).
...option 1, currently the most common used for enums, actually creates namespace pollution.
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Rhino scopes and contexts
it's important to understand that a scope is independent of the context that created it.
... you can create a scope using one context and then evaluate a script using that scope and another context (either by exiting the current context and entering another, or by executing on a different thread).
... a top-level scope is created by calling context.initstandardobjects to create all the standard objects: scriptableobject scope = cx.initstandardobjects(); the easiest way to embed rhino is just to create a new scope this way whenever you need one.
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Getting Started Guide
a rule of xpcom is that any function that creates or returns an interface pointer will have already addrefed it.
... you use an owning reference when you created the object; you got the object from a function that might have created it, e.g., any `getter' function, such as queryinterface, or createinstance.
... nscomptr<nsifoo> foo(dont_addref(createfoo())); // |createfoo| |addref|s its result, as all good getters do something nscomptr doesn't do an nscomptr does all that is necessary to behave as an owning reference.
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Index
13 autoconfig: how to create a configuration file autoconfiguration, thunderbird authoritative definition 14 autoconfiguration in thunderbird moved to autoconfiguration 15 buddy icons in mail seth spitzer mozilla is now able to show icons in the message header area and the addressbook card pane.
... instead of destroying the mail compose window on send (or close) just to create a new one the next time, mozilla mail will "cache" the compose window on send (or close), and use that instead.
... any new window performance problems that mozilla has are especially painful in mail compose, as we need to create a new compose window on every new mail message or reply.
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Recording a media element - Web APIs
utility functions next, we create some utility functions that will get used later.
... line 2 creates the mediarecorder that will handle recording the input stream.
... line 3 creates an empty array, data, which will be used to hold the blobs of media data provided to our ondataavailable event handler.
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Using the User Timing API - Web APIs
the user timing interface allows the developer to create application specific timestamps that are part of the browser's performance timeline.
... this document shows how to create mark and measure performance entry types and how to use user timing methods (which are extensions of the performance interface) to retrieve and remove entries from the browser's performance timeline.
... performance marks a performance mark is a named performance entry that is created by the application at some location in an application.
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Establishing a connection: The WebRTC perfect negotiation pattern - Web APIs
create the signaling and peer connections first, the signaling channel needs to be opened and the rtcpeerconnection needs to be created.
... let makingoffer = false; pc.onnegotiationneeded = async () => { try { makingoffer = true; await pc.setlocaldescription(); signaler.send({ description: pc.localdescription }); } catch(err) { console.error(err); } finally { makingoffer = false; } }; note that setlocaldescription() without arguments automatically creates and sets the appropriate description based on the current signalingstate.
... the set description is either an answer to the most recent offer from the remote peer or a freshly-created offer if there's no negotiation underway.
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A simple RTCDataChannel sample - Web APIs
set up the local peer localconnection = new rtcpeerconnection(); sendchannel = localconnection.createdatachannel("sendchannel"); sendchannel.onopen = handlesendchannelstatuschange; sendchannel.onclose = handlesendchannelstatuschange; the first step is to create the "local" end of the connection.
... the next step is to create the rtcdatachannel by calling rtcpeerconnection.createdatachannel() and set up event listeners to monitor the channel so that we know when it's opened and closed (that is, when the channel is connected or disconnected within that peer connection).
... set up the remote peer remoteconnection = new rtcpeerconnection(); remoteconnection.ondatachannel = receivechannelcallback; the remote end is set up similarly, except that we don't need to explicitly create an rtcdatachannel ourselves, since we're going to be connected through the channel established above.
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Using DTMF with WebRTC - Web APIs
offeroptions an rtcofferoptions object providing options to specify when calling rtcpeerconnection.createoffer().
... then a second rtcpeerconnection, this one representing the receiving end of the call, is created and stored in receiverpc; its onicecandidate event handler is set up too.
...falling " + "back to the <strong>deprecated</strong> addstream() method..."); callerpc.addstream(stream); } if (callerpc.getsenders) { dtmfsender = callerpc.getsenders()[0].dtmf; } else { log("your browser doesn't support rtcpeerconnection.getsenders(), so " + "falling back to use <strong>deprecated</strong> createdtmfsender() " + "instead."); dtmfsender = callerpc.createdtmfsender(audiotracks[0]); } dtmfsender.ontonechange = handletonechangeevent; } after setting audiotracks to be a list of the audio tracks on the stream from the user's microphone, it's time to add the media to the caller's rtcpeerconnection.
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Viewpoints and viewers: Simulating cameras in WebXR - Web APIs
simulating classic cinematography cinematography is the art of designing, planning, and executing camera movements to create the desired look and emotion for a scene in animation or film.
...a slow move can bring a sense of movement, ease, or focus to a scene, while a rapid zoom can create a sense of anxiety, surprise, or tension.
... there are two techniques in 3d graphics that can create similar though not identical results, and whose methods apply more easily in different situations.
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Geometry and reference spaces in WebXR - Web APIs
like an architect or a set designer, you have the power to create moods and experiences through a physical environment.
...the right balance can create a unique presence and guide your user.
... once created, an xrreferencespace guarantees a certain level of support for motion and orientation tracking, and provides a mechanism for obtaining an xrviewerpose from which you can get a matrix which represents the position and facing direction of the space relative to the world space, if the space represents a viewer such as the user's headset, an observer's headset, or a virtual camera.
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Movement, orientation, and motion: A WebXR example - Web APIs
session_type the type of xr session to create: inline for an inline session presented in the context of the document and immersive-vr to present the scene to an immersive vr headset.
... const viewerstartposition = vec3.fromvalues(0, 0, -10); const viewerstartorientation = vec3.fromvalues(0, 0, 1.0); const cubeorientation = vec3.create(); const cubematrix = mat4.create(); const mousematrix = mat4.create(); const inverseorientation = quat.create(); const radians_per_degree = math.pi / 180.0; the first two—viewerstartposition and viewerstartorientation—indicate where the viewer will be placed relative to the center of the space, and the direction in which they'll initially be looking.
...startposition); vec3.copy(cubeorientation, viewerstartorientation); xrsession.requestreferencespace(refspacetype) .then((refspace) => { xrreferencespace = refspace.getoffsetreferencespace( new xrrigidtransform(viewerstartposition, cubeorientation)); animationframerequestid = xrsession.requestanimationframe(drawframe); }); return xrsession; } after storing the newly-created xrsession object into xrsession, the label of the button is set to "exit webxr" to indicate its new function after starting the scene, and a handler is installed for the end event, so we get notified when the xrsession ends.
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WebXR Device API - Web APIs
the webxr device api implements the core of the webxr feature set, managing the selection of output devices, render the 3d scene to the chosen device at the appropriate frame rate, and manage motion vectors created using input controllers.
... to accomplish these things, the webxr device api provides the following key capabilities: find compatible vr or ar output devices render a 3d scene to the device at an appropriate frame rate (optionally) mirror the output to a 2d display create vectors representing the movements of input controls at the most basic level, a scene is presented in 3d by computing the perspective to apply to the scene in order to render it from the viewpoint of each of the user's eyes by computing the position of each eye and rendering the scene from that position, looking in the direction the user is currently facing.
...using the xrsystem interface, you can create xrsessions to represent actual ar and/or vr sessions.
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Background audio processing using AudioWorklet - Web APIs
when the web audio api was first introduced to browsers, it included the ability to use javascript code to create custom audio processors that would be invoked to perform real-time audio manipulations.
...with the processor registered, you can create a new audioworkletnode which passes the audio through the processor's code when the node is linked into the chain of audio nodes along with any other audio nodes.
... create module that defines a audio worklet processor class, based on audioworkletprocessor which takes audio from one or more incoming sources, performs its operation on the data, and outputs the resulting audio data.
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Overview of CSS Shapes - CSS: Cascading Style Sheets
there are a number of ways to create these shapes and in these guides we will find out how css shapes work, and consider some ways you might like to use them.
...the result is that the content now curves around the circular shape rather than following the rectangle created by the box of the image.
... we have already seen how circle() creates a circular shape.
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Block formatting context - Developer guides
a block formatting context is created by at least one of the following: the root element of the document (<html>).
... anonymous table cells implicitly created by the elements with display: table, table-row, table-row-group, table-header-group, table-footer-group (which is the default for html tables, table rows, table bodies, table headers, and table footers, respectively), or inline-table.
... column-span: all should always create a new formatting context, even when the column-span: all element isn't contained by a multicol container (spec change, chrome bug).
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HTML attribute: rel - HTML: Hypertext Markup Language
not allowed annotation annotation noopener creates a top-level browsing context that is not an auxiliary browsing context if the hyperlink would create either of those to begin with (i.e., has an appropriate target attribute value).
... not allowed annotation annotation opener creates an auxiliary browsing context if the hyperlink would otherwise create a top-level browsing context that is not anauxiliary browsing context (i.e., has "_blank" as target attribute value).
...in this case, on <link> and <form>, if the rel attribute is absent, has no keywords, or if not one or more of the space-separated keywords above, then the element does not create any links.
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<input type="datetime-local"> - HTML: Hypertext Markup Language
<input> elements of type datetime-local create input controls that let the user easily enter both a date and a time, including the year, month, and day as well as the time in hours and minutes.
...this is somewhat like having date and time widgets both created for you and merged into one.
...as an example, the datetime-local picker on firefox for android looks like this: non-supporting browsers gracefully degrade to a text input, but this creates problems both in terms of consistency of user interface (the presented control will be different), and data handling.
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TypedArray - JavaScript
int8array), an array buffer is created internally in memory or, if an arraybuffer object is given as constructor argument, then this is used instead.
...instead, you create an instance of an array of a particular type, such as a int8array or a bigint64array.
... parameters length when called with a length argument, an internal array buffer is created in memory, of size length multiplied by bytes_per_element bytes, containing zeros.
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Communicating With Other Scripts - Archive of obsolete content
for example: if an add-on creates a single panel object and loads several content scripts into the panel at the same time, then they can interact with each other.
... if an add-on creates two panel objects and loads a script into each one, they can't interact with each other.
... if an add-on creates a single page-mod object and loads several content scripts into the page mod, then only content scripts associated with the same page can interact with each other: if two different matching pages are loaded, content scripts attached to page a cannot interact with those attached to page b.
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Interacting with page scripts - Archive of obsolete content
by default, content scripts loaded by add-ons and scripts loaded by web pages are insulated from each other: content scripts can't interact directly with page scripts or access javascript objects they create page scripts can't interact directly with content scripts or access objects they create.
...you don't want arbitrary web pages to be able to access objects in content scripts, and you don't want objects created by content scripts to clash with objects created by page scripts.
...cloneinto() creates a structured clone of the object in the target context, and returns a reference to the clone.
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Creating Reusable Modules - Archive of obsolete content
it's a useful way to create a "fingerprint" that can be used to identify a file.
...the documentation for that interface includes an example which we can adapt like this: var {cc, ci} = require("chrome"); function promptforfile() { const nsifilepicker = ci.nsifilepicker; var fp = cc["@mozilla.org/filepicker;1"] .createinstance(nsifilepicker); var window = require("sdk/window/utils").getmostrecentbrowserwindow(); fp.init(window, "select a file", nsifilepicker.modeopen); fp.appendfilters(nsifilepicker.filterall | nsifilepicker.filtertext); var rv = fp.show(); if (rv == nsifilepicker.returnok || rv == nsifilepicker.returnreplace) { var file = fp.file; // get the path as string.
...we can adapt it like this: var {cc, ci} = require("chrome"); // return the two-digit hexadecimal code for a byte function tohexstring(charcode) { return ("0" + charcode.tostring(16)).slice(-2); } function md5file(path) { var f = cc["@mozilla.org/file/local;1"] .createinstance(ci.nsilocalfile); f.initwithpath(path); var istream = cc["@mozilla.org/network/file-input-stream;1"] .createinstance(ci.nsifileinputstream); // open for reading istream.init(f, 0x01, 0444, 0); var ch = cc["@mozilla.org/security/hash;1"] .createinstance(ci.nsicryptohash); // we want to use the md5 algorithm ch.init(ch.md5); // this tells updatefro...
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Interaction between privileged and non-privileged pages - Archive of obsolete content
to trigger the alert() in the listener and pass the data from the web page, write code such as this in the web page: var element = document.createelement("myextensiondataelement"); element.setattribute("attribute1", "foobar"); element.setattribute("attribute2", "hello world"); document.documentelement.appendchild(element); var evt = document.createevent("events"); evt.initevent("myextensionevent", true, false); element.dispatchevent(evt); this code creates an arbitrary element -- <myextensiondataelement/> -- and inserts it into the web p...
...finally, the code creates and dispatches a custom event named myextensionevent -- similar to the standard dom click event you catch with onclick handlers.
... you can optionally clean up the created element, or create it once when the web page loads then re-use it each time.
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JavaScript Client API - Archive of obsolete content
to create a custom sync engine to synchronize a new data you, you'll need to define an engine object that extends the base syncengine object.
... in this case, it is highly recommended to use the utils.makeguid() helper to generate new guids: let newguid = utils.makeguid(); your store object must implement the following methods: itemexists(id) createrecord(id, collection) changeitemid(oldid, newid) getallids() wipe() create(record) update(record) remove(record) you may also find it useful to override other methods of the base implementation, for example applyincomingbatch if the underlying storage for your data supports batch operations.
... createrecord the createrecord( id, collection ) method gets called by the engine to request a new record for an item with a given guid.
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Mozilla Application Framework in Detail - Archive of obsolete content
editor's note: this article should be rewritten to describe why use xulrunner to create your own application.
...you can create applications using our framework that either have a native look and feel for each os, or one which is identical on macs, pc's or unix operating systems.
...in addition to the technologies already mentioned, we go even further by allowing you to even create your own custom interface widgets.
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Creating a Skin - Archive of obsolete content
this section describes how to create a simple skin.
...let's create a skin that we can apply to it.
... you need to create a file 'findfile.css' in a custom skin.
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Modifying a XUL Interface - Archive of obsolete content
creating new elements you can create new elements using the createelement() function of the document.
... it takes one argument, the tag name of the element to create.
...for example, the following will add a button to a xul window: example 1 : source view <script> function addbutton(){ var abox = document.getelementbyid("abox"); var button = document.createelement("button"); button.setattribute("label","a new button"); abox.appendchild(button); } </script> <box id="abox" width="200"> <button label="add" oncommand="addbutton();"/> </box> this example has two parts a box container element in xul.
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Test your skills: Basic controls - Learn web development
basic controls 1 this task starts you off nice and gently by asking you to create two <input> elements, for a user's id and password, along with a submit button.
... create appropriate inputs for user id and password.
... create a submit button inside the remaining list item, with button text of "log in".
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Making asynchronous programming easier with async and await - Learn web development
you can also create an async function expression, like so: let hello = async function() { return "hello" }; hello(); and you can use arrow functions: let hello = async () => { return "hello" }; these all do basically the same thing.
...status: ${response.status}`); } else { return response.blob(); } }) .then(myblob => { let objecturl = url.createobjecturl(myblob); let image = document.createelement('img'); image.src = objecturl; document.body.appendchild(image); }) .catch(e => { console.log('there has been a problem with your fetch operation: ' + e.message); }); by now, you should have a reasonable understanding of promises and how they work, but let's convert this to use async/await to see how much simpler it makes things: asyn...
...status: ${response.status}`); } else { let myblob = await response.blob(); let objecturl = url.createobjecturl(myblob); let image = document.createelement('img'); image.src = objecturl; document.body.appendchild(image); } } myfetch() .catch(e => { console.log('there has been a problem with your fetch operation: ' + e.message); }); it makes code much simpler and easier to understand — no more .then() blocks everywhere!
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A first splash into JavaScript - Learn web development
ntent = 'last guess was too low!' ; } else if(userguess > randomnumber) { loworhi.textcontent = 'last guess was too high!'; } } guesscount++; guessfield.value = ''; } guesssubmit.addeventlistener('click', checkguess); function setgameover() { guessfield.disabled = true; guesssubmit.disabled = true; resetbutton = document.createelement('button'); resetbutton.textcontent = 'start new game'; document.body.append(resetbutton); resetbutton.addeventlistener('click', resetgame); } function resetgame() { guesscount = 1; const resetparas = document.queryselectorall('.resultparas p'); for(let i = 0 ; i < resetparas.length ; i++) { resetparas[i].textcontent = ''; } ...
... let's imagine your boss has given you the following brief for creating this game: i want you to create a simple guess the number type game.
...you create a variable with the keyword let (or var) followed by a name for your variable (you'll read more about the difference between the keywords in a future article).
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Test your skills: Object-oriented JavaScript - Learn web development
create a new instance of the shape class called square.
... create a new instance of shape called triangle, with a name of triangle and a sidelength of 3.
... try updating the live code below to recreate the finished example: download the starting point for this task to work in your own editor or in an online editor.
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Componentizing our Svelte app - Learn web development
other people apply the same techniques used for deciding if you should create a new function or object.
... first of all, create a new file — components/filterbutton.svelte.
... creating our todo component now we will create a todo component to encapsulate each individual todo — including the checkbox and some editing logic so you can change an existing todo.
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Package management basics - Learn web development
you could manage your own package registry — products like microsoft azure allow you to create proxies to the npm registry (so you can override or lock certain packages), github also offers a package registry service, and there will be likely more options appearing as time goes on.
... setting up the app as an npm package first of all, create a new directory to store our experimental app in, somewhere sensible that you’ll find again.
... we’ll call it parcel-experiment, but you can call it whatever you like: mkdir parcel-experiment cd parcel-experiment next, let's initialise our app as an npm package, which creates a config file — package.json — that allows us to save our configuration details in case we want to recreate this environment later on, or even publish the package to the npm registry (although this is somewhat beyond the scope of this article).
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How Mozilla's build system works
the file is generated from a file called configure.in, which is written in m4 and processed using autoconf 2.13 to create the final configure script.
...0 created; 1 updated; 2187 unchanged total wall time: 5.03s; cpu time: 3.79s; efficiency: 75% what this is saying is that a total of 1,096 moz.build files were read.
...if you wanted to create a consumer that performed a line count of all c++ files or generated a clang compilation database, for example, this would be an acceptable use of a buildbackend.
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Overview of Mozilla embedding APIs
do_createinstance this function simplifies creating new component instances.
... ns_getweakreference this function creates a weak reference to a component which implements the nsiweakreference interface.
...conceptually, for each document being rendered, gecko creates a container called a domwindow.
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NSS_3.12_release_notes.html
ocspenabledsoftfailurepolicy (see cert.h) cert_getpkixverifynistrevocationpolicy (see cert.h) cert_getusepkixforvalidation (see cert.h) cert_getvaliddnspatternsfromcert (see cert.h) cert_newtempcertificate (see cert.h) cert_setocsptimeout (see certhigh/ocsp.h) cert_setusepkixforvalidation (see cert.h) cert_pkixverifycert (see cert.h) hash_gettype (see sechash.h) nss_initwithmerge (see nss.h) pk11_createmergelog (see pk11pub.h) pk11_creategenericobject (see pk11pub.h) pk11_createpbev2algorithmid (see pk11pub.h) pk11_destroymergelog (see pk11pub.h) pk11_generatekeypairwithopflags (see pk11pub.h) pk11_getpbecryptomechanism (see pk11pub.h) pk11_isremovable (see pk11pub.h) pk11_mergetokens (see pk11pub.h) pk11_writerawattribute (see pk11pub.h) seckey_ecparamstobasepointorderlen (see keyhi.h) seckey_e...
...cparamstokeysize (see keyhi.h) secmod_deletemoduleex (see secmod.h) sec_getregisteredhttpclient (see ocsp.h) sec_pkcs5isalgorithmpbealgtag (see secpkcs5.h) vfy_createcontextdirect (see cryptohi.h) vfy_createcontextwithalgorithmid (see cryptohi.h) vfy_verifydatadirect (see cryptohi.h) vfy_verifydatawithalgorithmid (see cryptohi.h) vfy_verifydigestdirect (see cryptohi.h) vfy_verifydigestwithalgorithmid (see cryptohi.h) new macros for camellia support (see blapit.h): nss_camellia nss_camellia_cbc camellia_block_size new macros for rsa (see blapit.h): rsa_max_modulus_bits rsa_max_exponent_bits new macros in certt.h: x.509 v3 ku_encipher_only cert_max_serial_number_bytes cert_max_dn_bytes pkix cert_rev_m_do_not_test_using_this_method cert_rev_m_test_using_this_method cert_rev_m_allow_netwo...
... bug 354403: nsslist_createiterator returns pointer to a freed memory if the function fails to allocate a lock bug 399236: pkix wrapper must print debug output into stderr bug 399300: pkix error results not freed after use.
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PKCS11 Implement
c_closesession the nss calls c_closesession to close sessions created for bulk encryption.
... c_logout the nss calls c_logout on a token's initial session when the password is timed out when performing any kind of private key operation if "ask always" is turned on when changing a password when the user logs out object management c_createobject the nss calls c_createobject when loading new private keys and new certificates into a token.
... typically, nss uses c_createobject for creating a new private key if pkcs #12 is operating or if your writable token doesn't support c_generatekeypair.
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NSS tools : modutil
this tool can also create certificate, key, and module security database files.
... -create create new certificate, key, and module databases.
... -dbdir [sql:]directory specify the database directory in which to access or create security module database files.
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gtstd.html
if you are creating a server application, you must use the certificate database tool, which comes with nss, to create the certx.db and keyx.db files and populate them with the appropriate certificates and keys.
... if you are creating a client application, you can use either the certificate database tool or the communicator security interface to create the database files and populate them with the appropriate certificates and keys.
... create a new certificate database in the ca_db directory.
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NSS tools : modutil
this tool can also create certificate, key, and module security database files.
... -create create new certificate, key, and module databases.
... -dbdir [sql:]directory specify the database directory in which to access or create security module database files.
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Hacking Tips
this unwinder is able to read the frames created by the jit, and to display the frames which are after these jit frames.
... do next in gdb until you reach the definition of the funcptr: // call the per-exported-function trampoline created by generateentry.
... using the tracelogger (js shell / browser) create graphs showing time spent in which engine and which function like this.
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JS_DefineConstDoubles
create multiple constant double or integer valued properties on an object.
... obj jsobject * object for which to create new properties.
... cds jsconstdoublespec * pointer to an array of jsconstdoublespec records containing property names and values to create.
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Places utilities for JavaScript
placesutils method overview nsiuri createfixeduri(string aspec); string getformattedstring(string key, string params); string getstring(string key); boolean nodeisfolder(nsinavhistoryresultnode anode); boolean nodeisbookmark(nsinavhistoryresultnode anode); boolean nodeisseparator(nsinavhistoryresultnode anode); boolean nodeisvisit(nsinavhistoryresultnode anode); boolean nodei...
...ostrecentbookmarkforuri(nsiuri auri); nsinavhistoryresultnode getmostrecentfolderforfeeduri(nsiuri auri); nsinavhistoryresultnode geturlsforcontainernode(nsinavhistoryresultnode anode); void opencontainernodeintabs(nsinavhistoryresultnode anode, nsidomevent aevent); void openurinodesintabs(array nsinavhistoryresultnode anodes, nsidomevent aevent); void createmenuitemfornode(nsinavhistoryresultnode anode, acontainersmap); constants mimetypes type_x_moz_place_container type_x_moz_place_separator: "text/x-moz-place-separator", type_x_moz_place: "text/x-moz-place", type_x_moz_url: "text/x-moz-url", type_html: "text/html", type_unicode: "text/unicode", services there's easy access to some of the common services used in bookmarks or histo...
... placesflavors generic_view_drop_types methods createfixeduri nsiuri createfixeduri(string aspec) takes in a spec and returns a valid uri based on it using the nsiurifixup service.
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Generic factory
in xpcom, a generic factory is a factory created using the facilities in xpcom/glue/nsigenericfactory.h.
...rick potts wrote a templated-based generic factory (nsfactory<t>) that simplifies the factory creation process that just requires writing a createinstance() method.
... */ class nsigenericfactory : public nsifactory { public: static const nsiid& iid() { static nsiid iid = ns_igenericfactory_iid; return iid; } typedef ns_callback(constructorprocptr) (nsisupports *aouter, refnsiid aiid, void **aresult); /** * establishes the generic factory's constructor function, which will be called * by createinstance.
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XPCOM array guide
an nsiarray implementation can be created from c++ or javascript using nsicomponentmanager.createinstance() and the contract id "@mozilla.org/array;1".
... the created array implements nsimutablearray and nsiarray.
... c++ example void getlist(nsiarray** aresult) { nscomptr<nsimutablearray> array = do_createinstance(ns_array_contractid); // append some elements ...
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XPCOM Stream Guide
this implementation actually writes the contents of the file you're trying to create to a temporary file.
...if you have an input stream called nativestream, you can use code like this: var stream = components.classes["@mozilla.org/scriptableinputstream;1"] .createinstance(components.interfaces.nsiscriptableinputstream); stream.init(nativestream); the stream provides .read(count), .available(), and .close() methods.
...however, it is usually better to create an input stream that you then feed to the output stream: var outstream = components.classes["@mozilla.org/storagestream;1"] .createinstance(components.interfaces.nsistoragestream) .getoutputstream(); var instream = components.classes["@mozilla.org/io/string-input-stream;1"] .createinstance(components.interfaces.nsistringinputstream); var data = "hello world"; instream.setdata(data, data.length); while (instream.available()) { outstream.writefrom(instream, instream.available()); } note this is an inefficient example: the only important part is how to feed the outp...
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Components.Constructor
summary creates a javascript function which can be used to create or construct new instances of xpcom components.
... syntax var func = [ new ] components.constructor(contractid [, interfacename [, initializer ] ]); parameters contractid a string containing the contract id of the component interfacename if given, nsisupports.queryinterface() will be called on each newly-created instance with the interface named by this string initializer if given, a string containing the name of a function which will be called on the newly-created instance, using the arguments provided to the created function when called description components.constructor() is a handy shortcut for creating instances of xpcom components.
... it eliminates the clutter of typing components.classes, components.interfaces, createinstance, and so on every time you wish to create an instance.
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imgIContainer
to create an instance, use: implemented by: ?????????????????????????????????????
... as a service: var imgicontainer = components.classes["@mozilla.org/????????????????????????????"] .createinstance(components.interfaces.imgicontainer); method overview void addrestoredata([array, size_is(acount), const] in char data, in unsigned long acount); native code only!
...create and return a new copy of the current frame that you can write to and otherwise inspect the pixels of.
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nsIAccessibleRetrieval
create a new accessible of the appropriate type if necessary, or use one from the accessibility cache if it already exists.
...create a new accessible of the appropriate type if necessary, or use one from the accessibility cache if it already exists.
...create a new accessible of the appropriate type if necessary, or use one from the accessibility cache if it already exists.
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nsICache
access granted - you must write to this descriptor because the cache entry was just created for you.
... access_read_write 3 access requested - i want to read, but i'm willing to update an existing entry if necessary, or create a new one if none exists.
...this constant specify that cache session is not a stream based entry when calling nsicacheservice.createsession() method.
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nsICacheService
method overview nsicachesession createsession(in string clientid, in nscachestoragepolicy storagepolicy, in boolean streambased); acstring createtemporaryclientid(in nscachestoragepolicy storagepolicy); obsolete since gecko 1.9.2 void evictentries(in nscachestoragepolicy storagepolicy); void init(); obsolete since gecko 1.8 void shutdown(); obsolete since gecko 1.8 void visitentries(in n...
... methods createsession() this method creates a cache session.
...hence, it is possible to create duplicate cache sessions.
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nsIDOMParser
creating a domparser to create a domparser object from a web page or a chrome script running in a window, simply use new domparser().
... when you create a domparser from a privileged script, you can pass parameters to the constructor, more on that below.
... to create a domparser when the constructor is not available (e.g., from a js xpcom component, a js module, or an xpcshell test), use: var parser = components.classes["@mozilla.org/xmlextras/domparser;1"] .createinstance(components.interfaces.nsidomparser); // optionally, call parser.init(principal, documenturi, baseuri); principals, document and base uri note: this section covers changes introduced to domparser in gecko 1.9.
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nsINavBookmarksService
nts.classes["@mozilla.org/browser/nav-bookmarks-service;1"] .getservice(components.interfaces.nsinavbookmarksservice); method overview void addobserver(in nsinavbookmarkobserver observer, in boolean ownsweak); void beginupdatebatch(); obsolete since gecko 1.9 void changebookmarkuri(in long long aitemid, in nsiuri anewuri); long long createdynamiccontainer(in long long aparentfolder, in autf8string aname, in astring acontractid, in long aindex); note: renamed from createcontainer in gecko 1.9 obsolete since gecko 13.0 long long createfolder(in long long aparentfolder, in autf8string name, in long index); void endupdatebatch(); obsolete since gecko 1.9 void exportbookmarkshtml(in nsifile file); obsolete sin...
... this method creates a dynamic container under the given parent folder.
... long long createdynamiccontainer( in long long aparentfolder, in autf8string aname, in astring acontractid, in long aindex ); parameters aparentfolder the id of the parent folder.
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nsISupports proxies
the only difference is that the first accepts a created object object, and the latter will create an object for you.
...for instance, if you need to not only use an object remotely, but also have it created remotely, use the second api.
...these means that you should have had to create and idl for it and have generated a typelib.
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nsIZipWriter
to create an instance, use: var zipwriter = components.classes["@mozilla.org/zipwriter;1"] .createinstance(components.interfaces.nsizipwriter); method overview void addentrychannel(in autf8string azipentry, in prtime amodtime, in print32 acompression, in nsichannel achannel, in boolean aqueue); void addentrydirectory(in autf8string azipentry, in prtime amodtime, in boo...
...(a forward slash is '/') detail: this azipentry is very important, this example demonstrates its usage: var zw = cc['@mozilla.org/zipwriter;1'].createinstance(ci.nsizipwriter); var myzipfile = fu.file('c:\\myzipfile.zip'); //this file will be creatd in c drive var pr = {pr_rdonly: 0x01, pr_wronly: 0x02, pr_rdwr: 0x04, pr_create_file: 0x08, pr_append: 0x10, pr_truncate: 0x20, pr_sync: 0x40, pr_excl: 0x80}; zw.open(xpi, pr.pr_wronly | pr.pr_create_file | pr.pr_truncate); //xpi file is created if not there, if it is there it is truncated/deleted ...
...zw.addentryfile(saveinzipas, ci.nsizipwriter.compression_none, filetoaddtozip, false); this example creates a folder in the zip called "sub folder" and then adds "c:\add this file.txt" to it, but it will be called "blah.txt".
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Thunderbird Configuration Files
all these files are plain text files you need to create in your profile folder and can be edited using a standard text editor, such as notepad on windows and gedit or kate on linux.
...the path examples above refers to the default profile that is automatically created when you start thunderbird for the first time.
...this folder does not exist by default, so you need to create it before you can start adding your preferences.
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Using the Multiple Accounts API
creating new accounts it is possible to create and modify accounts through the account manager api.
...you should not use createinstance() to create any of the relevant objects because the account manager needs to keep track of all of these objects as they are created.
... to create accounts using the api, you should do the following: create a fresh identity with createidentity(); assign values to the various identity properties as necessary.
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Drawing and Event Handling - Plugins
you can also use npn_getvalue to help create a menu or dialog box for a windowless plug-in.
... on ms windows and unix, the browser creates a child window for each plug-in instance and passes it a window through npp_setwindow.
...however, the browser can create invisible instances for which npp_setwindow is never called and a window is never created.
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Blob - Web APIs
to create a blob that contains a subset of another blob's data, use the slice() method.
... constructor blob() returns a newly created blob object which contains a concatenation of all of the data in the array passed into the constructor.
... examples creating a blob the blob() constructor can create blobs from other objects.
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EventTarget.addEventListener() - Web APIs
passivesupported = true; return false; } }; window.addeventlistener("test", null, options); window.removeeventlistener("test", null, options); } catch(err) { passivesupported = false; } this creates an options object with a getter function for the passive property; the getter sets a flag, passivesupported, to true if it gets called.
... then, when you want to create an actual event listener that uses the options in question, you can do something like this: someelement.addeventlistener("mouseup", handlemouseup, passivesupported ?
...while anonymous (and all traditional javascript functions) create their own this bindings, arrow functions inherit the this binding of the containing function.
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FileSystemFileEntry - Web APIs
it offers properties describing the file's attributes, as well as the file() method, which creates a file object that can be used to read the file.
... methods file() creates a new file object which can be used to read the file.
... obsolete methods createwriter() creates a new filewriter object which allows writing to the file represented by the file system entry.
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FileSystemFlags - Web APIs
methods which accept an options parameter of this type may specify zero or more of these flags as fields in an object, like this: datadirectoryentry.getdirectory("workspace", { create: true }, function(entry) { }); here, we see that the create property is provided, with a value of true, indicating that the directory should be created if it's not already there.
... properties create optional if this property is true, and the requested file or directory doesn't exist, the user agent should create it.
... exclusive optional if true, and the create option is also true, the file must not exist prior to issuing the call.
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HTMLMediaElement.srcObject - Web APIs
until other browsers catch up, for mediasource, blob and file, consider falling back to creating a url with url.createobjecturl() and assign it to htmlmediaelement.src.
... usage notes older versions of the media source specification required using createobjecturl() to create an object url then setting src to that url.
... examples basic example in this example, a mediastream from a camera is assigned to a newly-created <video> element.
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IDBObjectStore - Web APIs
methods idbobjectstore.add() returns an idbrequest object, and, in a separate thread, creates a structured clone of the value, and stores the cloned value in the object store.
... idbobjectstore.clear() creates and immediately returns an idbrequest object, and clears this object store in a separate thread.
... idbobjectstore.createindex() creates a new index during a version upgrade, returning a new idbindex object in the connected database.
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Checking when a deadline is due - Web APIs
recording the date information to provide a reasonable user experience on mobile devices, and to cut down on ambiguities, i decided to create an html form with: a text input for entering a title for your to-do list.
...duplicate items not allowed.</li>'; }; // create an object store on the transaction var objectstore = transaction.objectstore("todolist"); // add our newitem object to the object store var request = objectstore.add(newitem[0]); in this section we create an object called newitem that stores the data in the format required to insert it into the database.
... the next few lines open the database transaction and provide messages to notify the user if this was successful or failed.then an objectstore is created into which the new item is added.
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Intersection Observer API - Web APIs
creating an intersection observer create the intersection observer by calling its constructor and passing it a callback function to be run whenever a threshold is crossed in one direction or the other: let options = { root: document.queryselector('#scrollarea'), rootmargin: '0px', threshold: 1.0 } let observer = new intersectionobserver(callback, options); a threshold of 1.0 means that when 100% of the target is visible within...
... targeting an element to be observed once you have created the observer, you need to give it a target element to watch: let target = document.queryselector('#listitem'); observer.observe(target); // the callback we setup for the observer will be executed now for the first time // it waits until we assign a target to our observer (even if the target is currently not visible) whenever the target meets a threshold specified for the intersectionobserver...
...the values in rootmargin define offsets added to each side of the intersection root's bounding box to create the final intersection root bounds (which are disclosed in intersectionobserverentry.rootbounds when the callback is executed).
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Spaces and reference spaces: Spatial tracking in WebXR - Web APIs
note: this article presumes that you are familiar with the concepts introduced in geometry and reference spaces in webxr: that is, the basics of 3d coordinate systems, as well as webxr spaces, reference spaces, and how reference spaces are used to create local coordinate systems for individual objects or movable components within a scene.
...a pose, simply put, describes a position and orientation relative to the origin of the reference space from which it was created.
... there is only one way to create an xrpose, and that's using the getpose() method on an animation frame as given using an xrframe object.
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Controlling multiple parameters with ConstantSourceNode - Web APIs
you simply need to create a constantsourcenode and connect it to all of the audioparams whose values should be linked to always match each other.
...in this simple example, we create three oscillatornodes.
... function setup() { context = new (window.audiocontext || window.webkitaudiocontext)(); playbutton = document.queryselector("#playbutton"); volumecontrol = document.queryselector("#volumecontrol"); playbutton.addeventlistener("click", toggleplay, false); volumecontrol.addeventlistener("input", changevolume, false); gainnode1 = context.creategain(); gainnode1.gain.value = 0.5; gainnode2 = context.creategain(); gainnode3 = context.creategain(); gainnode2.gain.value = gainnode1.gain.value; gainnode3.gain.value = gainnode1.gain.value; volumecontrol.value = gainnode1.gain.value; constantnode = context.createconstantsource(); constantnode.connect(gainnode2.gain); constantnode.connect(gainnode3.gain); constantnode.star...
...And 6 more matches

Basic Shapes - CSS: Cascading Style Sheets
you have already met the reference box in the guide on creating shapes from box values, which directly uses the reference box to create the shape.
...in the screenshot below i have created a circle, using shape-outside: circle(50%).
... .shape { shape-outside: circle(50%) border-box; } what is worth noting is that the margin-box will clip the shape, therefore shapes created in reference to other shapes which extend past the margin box will have the shape clipped to the margin box.
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Shapes From Images - CSS: Cascading Style Sheets
in this guide we will take a look at how we can create a shape from an image file with an alpha channel or even from a css gradient.
... this is a very flexible way to create shapes.
... rather than drawing a path with a complex polygon in css, you can create the shape in a graphics program and then use the path created by the pixels less opaque than a threshold value.
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Visual formatting model - CSS: Cascading Style Sheets
box generation box generation is the part of the css visual formatting model that creates boxes from the document's elements.
... anonymous boxes an anonymous box is created when there is not an html element to use for the box.
...in order to fix the box tree, an anonymous box is created around that run of text.
...And 6 more matches

Audio and video manipulation - Developer guides
the beauty of the web is that you can combine technologies to create new forms.
...you can combine webgl and the <video> element to create video textures, which means you can put video inside 3d scenes.
... html <video id="my-video" controls src="myvideo.mp4" type="video/mp4"> </video> javascript var context = new audiocontext(), audiosource = context.createmediaelementsource(document.getelementbyid("my-video")), filter = context.createbiquadfilter(); audiosource.connect(filter); filter.connect(context.destination); // configure filter filter.type = "lowshelf"; filter.frequency.value = 1000; filter.gain.value = 25; playable code <video id="my-video" controls="true" width="480" height="270" crossorigin="anonymous"> <source src="https://udn.r...
...And 6 more matches

this - JavaScript
calling super() creates a this binding within the constructor and essentially has the effect of evaluating the following line of code, where base is the inherited class: this = new base(); warning: referring to this before calling super() will throw an error.
...calling f.bind(someobject) creates a new function with the same body and scope as f, but where this occurs in the original function, in the new function it is permanently bound to the first argument of bind, regardless of how the function is being used.
... // call as a method of an object var obj = {func: foo}; console.log(obj.func() === globalobject); // true // attempt to set this using call console.log(foo.call(obj) === globalobject); // true // attempt to set this using bind foo = foo.bind(obj); console.log(foo() === globalobject); // true no matter what, foo's this is set to what it was when it was created (in the example above, the global object).
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The building blocks of responsive design - Progressive web apps (PWAs)
for web developers, it is now fairly common to be called upon to create a web site or app that changes its user interface depending on the browser or device accessing the site to provide an optimized experience.
... one approach to this is to create different versions of your site/app for different platforms or browsers and serve them appropriately after detecting which browser or platform is looking at your site.
... it is usually much better to create a single version of your code which doesn't care about what browser or platform is accessing the site, but instead uses feature tests to find out what code features the browser supports or what the values of certain browser features are, and then adjusts the code appropriately.
...And 6 more matches

page-worker - Archive of obsolete content
create a permanent, invisible page and access its dom.
...a page worker may be destroyed, after which its memory is freed, and you must create a new instance to load another page.
...to do this, save the file in your add-on's data directory and create the url using the data.url() method of the self module: pageworker = require("sdk/page-worker").page({ contentscript: "console.log(document.body.innerhtml);", contenturl: require("sdk/self").data.url("myfile.html") }); from firefox 34, you can use "./myfile.html" as an alias for self.data.url("myfile.html").
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places/bookmarks - Archive of obsolete content
create, modify, and retrieve bookmarks.
... usage this module exports: three constructors: bookmark, group, and separator, corresponding to the types of objects, referred to as bookmark items, in the bookmarks database in firefox two additional functions, save() to create, update, and remove bookmark items, and search() to retrieve the bookmark items that match a particular set of criteria.
... examples creating a new bookmark let { bookmark, save } = require("sdk/places/bookmarks"); // create a new bookmark instance, unsaved let bookmark = bookmark({ title: "mozilla", url: "http://mozilla.org" }); // attempt to save the bookmark instance to the bookmarks database // and store the emitter let emitter = save(bookmark); // listen for events emitter.on("data", function (saved, inputitem) { // on a "data" event, an item has been updated, passing in the // latest snapshot from the ser...
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ui/frame - Archive of obsolete content
experimental create html iframes, using bundled html, css and javascript, that can be added to a designated area of the firefox user interface.
... usage this module exports the frame constructor, which can be used to create frame components.
... right now it can be used in conjunction with a toolbar: you create a frame, then supply it to the toolbar's constructor, and the content is then displayed inside the toolbar.
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Low-Level APIs - Archive of obsolete content
/loader create commonjs module loaders.
... event/target create objects that broadcast events.
... frame/hidden-frame creates firefox frames (i.e.
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Examples and demos from articles - Archive of obsolete content
in different objects and then to create a constructor for such class of objects in order to standardize and simplify the instantiation of them.
...[article] css pure-css dropdown menu [html] with the :hover pseudo-class you can create complex cascade algorithms.
... this is a common technique used, for example, in order to create pure-css dropdown menus (that is only css, without using javascript).
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Localizing an extension - Archive of obsolete content
if you haven't already created an extension, or would like to refresh your memory, take a look at the previous articles in this series: creating a status bar extension creating a dynamic status bar extension adding preferences to an extension download the sample you can download this article's sample code so you can look at it side-by-side with the article, or to use it as a basis for your own extension.
... download the sample localizing strings in xul files create the needed locale files each xul file that comprises the user interface for your extension should have a locale file in its locale directory.
...string bundles are created by establishing a property file that maps keys to string values.
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MCD, Mission Control Desktop, AKA AutoConfig - Archive of obsolete content
autoconfig directives here we want to set users central mail preferences: create one account from their login name, get their email address from an ldap request and set the enterprise imap and smtp servers.
... thunderbird.cfg (version 1) here's the complete file, first we get the user login name from environment variables, then configure the ldap address book, create an email account, and configure imap and smtp: [root@calaz /usr/lib/thunderbird] $ cat thunderbird.cfg //put everything in a try/catch try { // 1) env variables if(getenv("user") != "") { // *nix settings var env_user = getenv("user"); var env_home = getenv("home"); } else { // windows settings var env_user = getenv("username"); var env_home = getenv("homepath"); } var env_mozdebug= getenv("mozilla_debug"); // var env_user = prompt("indiquez votre login", toto); // 2) lock general preferences //ldap address...
...ts ) { // build the userinfo object for later use for( var attr in ldapattrs ) { userinfo[ ldapattrs[attr] ] = getldapvalue( queryresults, ldapattrs[attr] ); } } else { throw( "no ldap results" ); } } // call upon ldap for the values in ldapattrs array, // uses the previous processldapvalues() getldapattributes( ldaphost, ldapbase, ldapfilter, ldapattrs.join(",") ); // create account // see also http://blog.deanandadie.net/2010/06/easy-thunderbird-account-management-using-mcd/ // identity defaultpref("mail.identity.id1.fullname", userinfo.cn ); defaultpref("mail.identity.id1.smtpserver", "smtp1" ); defaultpref("mail.identity.id1.useremail", userinfo.mail ); // imap server settings defaultpref("mail.server.server1.hostname", "myimap.server.com" ); defaultpref("mail.se...
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File object - Archive of obsolete content
summary non-standard server-side object this object lets you work files and directories on the local filesystem, and create os pipelines.
... here is the original proposal for this object, and a status update from december 1998: http://www.mozilla.org/js/js-file-object.html created by the file constructor: new file(); new file(filename); parameters filename name of the file we want to work with.
... when a file is constructed, leading and trailing spaces are removed from the filename, so new file(" abc.txt ") just creates a file called abc.txt.
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Tamarin build documentation - Archive of obsolete content
use the following command to create a copy of the tamarin repository: $ hg clone http://hg.mozilla.org/tamarin-central tamarin-central tips for working with mercurial can be found here.
... building tamarin building tamarin will create all the libraries for the avmplus and garbage collector (mmgc), and create a standalone executable (shell) for executing files in the abc file format.
...the setup procedure below creates an android sdk/ndk entirely from publicly available sources.
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Using XPInstall to Install Plugins - Archive of obsolete content
myplugininstaller.xpi), and can be created on windows by utilities such as winzip.
... you can create an xpinstall file by first zipping all the items you want installed with winzip (create a zip archive) and then renaming it with the xpi file extension instead of the zip file extension.
...to actually create and write keys to the windows system registry, you'll use the functions of the winreg object.
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Working With Directories - Archive of obsolete content
a reference to a directory may be created in the same way as with a file by using nsiscriptableio.getfile().
...these directories do not need to exist yet, but they can be created using nsifile.create().
...var dir = io.getfile("desktop", "myfiles"); dir.append("pictures"); if (dir.exists() && dir.isdirectory()) alert("this is a directory"); creating directories you can create a new directory by using nsifile.create().
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Building Menus With Templates - Archive of obsolete content
this means that a menu created with a template will not have any of the generated items until the user opens the menu, or a script opens the menu.
...this allows for better performance as the entire content of a complex menu does not need to be created until the user needs to use the menu.
... it is very simple to create a menu using a template.
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Introduction - Archive of obsolete content
note that only the user interface will be created, with only limited functionality.
... what is xul and why was it created?
... xul (pronounced "zool" and rhyming with "cool") was created to make development of the mozilla browser easier and faster.
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More Menu Features - Archive of obsolete content
« previousnext » in this section, we'll look at creating submenus and checked menus creating submenus you can create submenus inside other menus (nested menus) using the existing elements.
...however, you can create submenus by simply placing the menu element inside the menupopup element.
...the example below creates a simple submenu inside the file menu example 1 : source view <toolbox flex="1"> <menubar id="sample-menubar"> <menu id="file-menu" label="file"> <menupopup id="file-popup"> <menu id="new-menu" label="new"> <menupopup id="new-popup"> <menuitem label="window"/> <menuitem label="message"/> </menupopup> </menu> <menuitem label="open"/> <menuitem label="save"/> <menuseparator/> <menuitem label="exit"/> </menupopup> </menu> </menubar> </toolbox> adding a menu to our find files example let's add a menu to the find files dialog.
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XUL Structure - Archive of obsolete content
these packaged files can be created by using a zip utility.
...to gain the extra privileges, you will need to create a manifest file and put that in the chrome directory.
... this file is easy to create, as it is typically only a couple of lines long.
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XML - Archive of obsolete content
lots of people have created new languages out of xml.
...information developers create languages particular to their applications, any time they need a very specific way to represent the structure of some data.
... when we say language, we mean that developers create a set of terms, orlexicon, and a relationship between these terms, or what some people call agrammar.
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toolbarbutton - Archive of obsolete content
checkstate type: integer, values 0, 1, or 2 this attribute may be used to create three state buttons, numbered 0, 1 and 2.
...if this attribute is not present, a normal button is created.
... you can set this attribute to the value menu to create a button with a menu popup.
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Sunbird Theme Tutorial - Archive of obsolete content
you also need knowledge of: using your operating system to create files and directories using the tools listed above css graphic design knowledge of xul, xbl and javascript is useful for advanced themes.
... creating a unique identifier create an identifier that is likely to be unique, in the form: <tt>something@domain-name</tt> it must contain an at-sign (<tt>@</tt>), making it look something like an e-mail address, but it does not need to be a real e-mail address.
...create a new directory in the <tt>extensions</tt> directory.
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Browser Feature Detection - Archive of obsolete content
m css 2 100% 98% 67% 71% / 83% 38% / 42% test results cross reference dom core level 1 support for properties/methods in document name firefox 1.5 ie 6 & 7 opera 8.54 - 9.01 document.doctype true true true document.implementation true true true document.documentelement true true true document.createelement() true true true document.createdocumentfragment() true true true document.createtextnode() true true true document.createcomment() true true true document.createcdatasection() true false true document.createprocessinginstruction() true false true document.createattribute() true ...
... true true document.createentityreference()obsolete since gecko 7 (method present but only returns null: bug 9850) false false document.getelementsbytagname() true true true dom core level 2 support for properties/methods in document name firefox 1.5 ie 6 & 7 opera 8.54 - 9.01 document.doctype true true true document.implementation true true true document.documentelement true true true document.createelement() true true true document.createdocumentfragment() true true true document.createtextnode() true true true document.createcomment() true true true document.createcdatasection() true fals...
...e true document.createprocessinginstruction() true false true document.createattribute() true true true document.createentityreference()obsolete since gecko 7 true false false document.getelementsbytagname() true true true document.importnode() true false true document.createelementns() true false true document.createattributens() true false true document.getelementsbytagnamens() true false true document.getelementbyid() true true true dom level 1 html support for properties/methods in document name firefox 1.5 ie 6 & 7 opera 8.54 - 9.01 document.documentelement true true true d...
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RDF in Mozilla FAQ - Archive of obsolete content
if the uri argument refers to an rdf/xml file's url, then the rdf service will create an rdf/xml datasource and asynchronously parse it.
... how do i create a datasource from an rdf/xml file?
... you can either create an rdf/xml datasource using the rdf service's getdatasource() method: // get the rdf service var rdf = components .classes["@mozilla.org/rdf/rdf-service;1"] .getservice(components.interfaces.nsirdfservice); // ...and from it, get the datasource.
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Organizing your CSS - Learn web development
create logical sections in your stylesheet it is a good idea to have all of the common styling first in the stylesheet.
... avoid overly-specific selectors if you create very specific selectors you will often find that you need to duplicate chunks of your css to apply the same rules to another element.
... article.main p.box { border: 1px solid #ccc; } if you then wanted to apply the same rules to something outside of main, or to something other than a <p>, you would have to add another selector to these rules or create a whole new ruleset.
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Dealing with files - Learn web development
inside your chosen place, create a new folder called web-projects (or similar).
... inside this first folder, create another folder to store your first website in.
...the most common things we'll have on any website project we create are an index html file and folders to contain images, style files, and script files.
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Choosing the right approach - Learn web development
nested callbacks) no code example an 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); pitfalls nested callbacks can be cumbersome and hard to read (i.e.
... single delayed operation repeating operation multiple sequential operations multiple simultaneous operations no yes no (unless it is the same one) no code example the following function creates a new date() object, extracts a time string out of it using tolocaletimestring(), and then displays it in the ui.
... we then run it once per second using setinterval(), creating the effect of a digital clock that updates once per second (see this live, and also see the source): function displaytime() { let date = new date(); let time = date.tolocaletimestring(); document.getelementbyid('demo').textcontent = time; } const createclock = setinterval(displaytime, 1000); pitfalls the frame rate isn't optimized for the system the animation is running on, and can be somewhat inefficient.
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JavaScript object basics - Learn web development
you should get a result similar to one of the below lines: [object object] object { } { } congratulations, you've just created your first object.
... an object like this is referred to as an object literal — we've literally written out the object contents as we've come to create it.
... it is very common to create an object using an object literal when you want to transfer a series of structured, related data items in some manner, for example sending a request to the server to be put into a database.
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Creating our first Vue component - Learn web development
previous overview: client-side javascript frameworks next now it's time to dive deeper into vue, and create our own custom component — we'll start by creating a component to represent each item in the todo list.
... objective: to learn how to create a vue component, render it inside another component, pass data into it using props, and save its state.
... creating a todoitem component let's create our first component, which will display a single todo item.
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Command line crash course - Learn web development
out of the box, here are just a few of the things the command line can do, along with names of relevant tools in each case: navigate your computer’s file system along with base level tasks such as create, copy, rename and delete: move around your directory structure: cd create directories: mkdir create files (and modify their metadata): touch copy files: cp move files: mv delete files or directories: rm download files found at specific urls: curl search for fragments of text inside larger bodies of text: grep view a file's contents page by page: less, cat manipulate ...
... have a play with them in a test directory you’ve created somewhere so that you don’t accidentally delete anything important, using the example commands below for guidance: mkdir — this creates a new directory inside the current directory you are in, with the name you provide after the command name.
...for example rmdir my-awesome-website will remove the directory we created above.
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Deploying our app - Learn web development
as such, it's important to create a toolchain that handles these problems in a way that requires as little manual intervention as possible.
... the newly-created production code is placed in a new directory called dist, which contains all the files required to run the website, ready for you to upload to a server.
... you should now be able to run the following command in the root of your project directory to run the production build step (first quit the running process with ctrl + c if you need to): npm run build this should give you an output like the following, showing you the production files that were created, how big they are, and how long they took to build: dist/src.99d8a31a.js.map 446.15 kb 63ms dist/src.99d8a31a.js 172.51 kb 5.55s dist/stars.7f1dd035.svg 6.31 kb 145ms dist/asteriod2.3ead4904.svg 3.51 kb 155ms dist/asteriod1.698d75e9.svg 2.9 kb 153ms dist/src.84f2edd1.css.map 2.57 kb 3ms dist/src.84f2edd1.css 1.25 kb ...
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Creating Custom Events That Can Pass Data
mozilla/content/events/src/nseventdispatcher.cpp note: in the mozilla 1.8.x branch this code is actually in mozilla/content/events/src/nseventlistenermanager.cpp this is quite an important file since this holds the createevent method which acts as a factory method dom events.
... the change you want to make is in nseventdispatcher::createevent().
... you will find that there is a bunch of code like: if (aeventtype.lowercaseequalsliteral("{somethingsomething}event")) return ns_{somethingsomething}event(adomevent, aprescontext, nsnull); you can either have a function like this or write the code straight in nseventlistenermanager::createevent() like this: if (aeventtype.lowercaseequalsliteral("nsmyevent")){ //note: the lowercase is important!
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Localizing with Mercurial
your mercurial configuration is contained within a config file which you must create yourself.
... your config file should have the following settings: [ui] username = your real name <user@example.com> merge = internal:merge [defaults] commit = -v [diff] git = 1 showfunc = 1 unified = 8 to configure hg, follow these steps: create a new file in your favorite text editor.
... here's how to get (or clone) your en-us source files for the first time: run the following command in the command line to get the source en-us files for firefox: hg clone https://hg.mozilla.org/mozilla-central/ this will create a clone of the mozilla-central repository in the directory mozilla-central.
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QA phase
manual & automated builds with the click of a button, some l10n tools (like narro and koala) automatically create language pack builds for you.
... to copy this file to the appropriate directory, do the following: navigate to your working directory from your command-line terminal (i.e., where you created the folder structure described above).
... to create and configure this file, follow these instructions: until the fix for bug 1063880 lands on mozilla-aurora and mozilla-beta when building language packs against those two trees you should: remove ac_add_options --disable-compile-environment from .mozconfig in step 3 use ./mach build config after step 4 update the mozilla source code: $ cd mozilla-aurora $ hg pull -u enter the following command to create the .mozconfig file: $ nano -w .mozconfig en...
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An overview of NSS Internals
it will detect and open an existing database, or it can create a new one.
...nss will usually create an in-memory (ram) presentation of certificates, once a certificate has been received from the network, read from disk, or looked up from the database, and prepare in-memory data structures that contain the certificate's properties, as well as providing a handle for the programmer to use.
...the usual approach is to create a certificate signing request (csr) as soon as an application is done with the creation step, which will have created a handle to the key pair, and which can be used for the necessary related operations, like producing a proof-of-ownership of the private key, which is usually required when submitting the public key with a csr to a ca.
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Encrypt Decrypt MAC Keys As Session Objects
mkey *key, unsigned char *iv, unsigned int ivlen, ck_mechanism_type type, ck_attribute_type operation) { secitem ivitem = { sibuffer, iv, ivlen }; pk11context *ctx = null; secitem *secparam = pk11_paramfromiv(ckm_aes_cbc, &ivitem); if (secparam == null) { pr_fprintf(pr_stderr, "crypt failed : secparam null\n"); return null; } ctx = pk11_createcontextbysymkey(ckm_aes_cbc, operation, key, secparam); if (ctx == null) { pr_fprintf(pr_stderr, "crypt failed : can't create a context\n"); goto cleanup; } cleanup: if (secparam) { secitem_freeitem(secparam, pr_true); } return ctx; } /* * common encryption and decryption code */ secstatus crypt(pk11context *ctx, unsigned char *out, unsigned in...
...unsigned int maclen; unsigned int nwritten; unsigned char encbuf[blocksize]; unsigned int encbuflen; secitem noparams = { sibuffer, null, 0 }; pk11context *ctxmac = null; pk11context *ctxenc = null; unsigned int pad[1]; secitem paditem; unsigned int paddinglength; static unsigned int firsttime = 1; int j; ctxmac = pk11_createcontextbysymkey(ckm_md5_hmac, cka_sign, mk, &noparams); if (ctxmac == null) { pr_fprintf(pr_stderr, "can't create mac context\n"); rv = secfailure; goto cleanup; } rv = macinit(ctxmac); if (rv != secsuccess) { goto cleanup; } ctxenc = encryptinit(ek, iv, ivlen, ckm_aes_cbc); /* read a buffer of plaintext from input file */ while ((p...
...textlen = pr_read(infile, ptext, sizeof(ptext))) > 0) { /* encrypt using it using cbc, using previously created iv */ if (ptextlen != blocksize) { paddinglength = blocksize - ptextlen; for ( j=0; j < paddinglength; j++) { ptext[ptextlen+j] = (unsigned char)paddinglength; } ptextlen = blocksize; } rv = encrypt(ctxenc, encbuf, &encbuflen, sizeof(encbuf), ptext, ptextlen); if (rv != secsuccess) { pr_fprintf(pr_stderr, "encrypt failure\n"); goto cleanup; } /* save the last block of ciphertext as the next iv */ iv = encbuf; ivlen = encbuflen; /* write the cipher text to intermediate file */ n...
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Encrypt and decrypt MAC using token
mkey *key, unsigned char *iv, unsigned int ivlen, ck_mechanism_type type, ck_attribute_type operation) { secitem ivitem = { sibuffer, iv, ivlen }; pk11context *ctx = null; secitem *secparam = pk11_paramfromiv(ckm_aes_cbc, &ivitem); if (secparam == null) { pr_fprintf(pr_stderr, "crypt failed : secparam null\n"); return null; } ctx = pk11_createcontextbysymkey(ckm_aes_cbc, operation, key, secparam); if (ctx == null) { pr_fprintf(pr_stderr, "crypt failed : can't create a context\n"); goto cleanup; } cleanup: if (secparam) { secitem_freeitem(secparam, pr_true); } return ctx; } /* * common encryption and decryption code */ secstatus crypt(pk11context *ctx, unsigned char *out, unsigned in...
...unsigned int maclen; unsigned int nwritten; unsigned char encbuf[blocksize]; unsigned int encbuflen; secitem noparams = { sibuffer, null, 0 }; pk11context *ctxmac = null; pk11context *ctxenc = null; unsigned int pad[1]; secitem paditem; unsigned int paddinglength; static unsigned int firsttime = 1; int j; ctxmac = pk11_createcontextbysymkey(ckm_md5_hmac, cka_sign, mk, &noparams); if (ctxmac == null) { pr_fprintf(pr_stderr, "can't create mac context\n"); rv = secfailure; goto cleanup; } rv = macinit(ctxmac); if (rv != secsuccess) { goto cleanup; } ctxenc = encryptinit(ek, iv, ivlen, ckm_aes_cbc); /* read a buffer of plaintext from input file */ while ((p...
...textlen = pr_read(infile, ptext, sizeof(ptext))) > 0) { /* encrypt using it using cbc, using previously created iv */ if (ptextlen != blocksize) { paddinglength = blocksize - ptextlen; for ( j=0; j < paddinglength; j++) { ptext[ptextlen+j] = (unsigned char)paddinglength; } ptextlen = blocksize; } rv = encrypt(ctxenc, encbuf, &encbuflen, sizeof(encbuf), ptext, ptextlen); if (rv != secsuccess) { pr_fprintf(pr_stderr, "encrypt failure\n"); goto cleanup; } /* save the last block of ciphertext as the next iv */ iv = encbuf; ivlen = encbuflen; /* write the cipher text to intermediate file */ n...
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Encrypt Decrypt_MAC_Using Token
mkey *key, unsigned char *iv, unsigned int ivlen, ck_mechanism_type type, ck_attribute_type operation) { secitem ivitem = { sibuffer, iv, ivlen }; pk11context *ctx = null; secitem *secparam = pk11_paramfromiv(ckm_aes_cbc, &ivitem); if (secparam == null) { pr_fprintf(pr_stderr, "crypt failed : secparam null\n"); return null; } ctx = pk11_createcontextbysymkey(ckm_aes_cbc, operation, key, secparam); if (ctx == null) { pr_fprintf(pr_stderr, "crypt failed : can't create a context\n"); goto cleanup; } cleanup: if (secparam) { secitem_freeitem(secparam, pr_true); } return ctx; } /* * common encryption and decryption code.
...unsigned int maclen; unsigned int nwritten; unsigned char encbuf[blocksize]; unsigned int encbuflen; secitem noparams = { sibuffer, null, 0 }; pk11context *ctxmac = null; pk11context *ctxenc = null; unsigned int pad[1]; secitem paditem; unsigned int paddinglength; static unsigned int firsttime = 1; int j; ctxmac = pk11_createcontextbysymkey(ckm_md5_hmac, cka_sign, mk, &noparams); if (ctxmac == null) { pr_fprintf(pr_stderr, "can't create mac context\n"); rv = secfailure; goto cleanup; } rv = macinit(ctxmac); if (rv != secsuccess) { goto cleanup; } ctxenc = encryptinit(ek, iv, ivlen, ckm_aes_cbc); /* read a buffer of plaintext from input file.
... */ while ((ptextlen = pr_read(infile, ptext, sizeof(ptext))) > 0) { /* encrypt using it using cbc, using previously created iv.
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NSS Sample Code Sample_3_Basic Encryption and MACing
mkey *key, unsigned char *iv, unsigned int ivlen, ck_mechanism_type type, ck_attribute_type operation) { secitem ivitem = { sibuffer, iv, ivlen }; pk11context *ctx = null; secitem *secparam = pk11_paramfromiv(ckm_aes_cbc, &ivitem); if (secparam == null) { pr_fprintf(pr_stderr, "crypt failed : secparam null\n"); return null; } ctx = pk11_createcontextbysymkey(ckm_aes_cbc, operation, key, secparam); if (ctx == null) { pr_fprintf(pr_stderr, "crypt failed : can't create a context\n"); goto cleanup; } cleanup: if (secparam) { secitem_freeitem(secparam, pr_true); } return ctx; } /* * common encryption and decryption code */ secstatus crypt(pk11context *ctx, unsigned char *out, unsigned in...
...unsigned int maclen; unsigned int nwritten; unsigned char encbuf[blocksize]; unsigned int encbuflen; secitem noparams = { sibuffer, null, 0 }; pk11context *ctxmac = null; pk11context *ctxenc = null; unsigned int pad[1]; secitem paditem; unsigned int paddinglength; static unsigned int firsttime = 1; int j; ctxmac = pk11_createcontextbysymkey(ckm_md5_hmac, cka_sign, mk, &noparams); if (ctxmac == null) { pr_fprintf(pr_stderr, "can't create mac context\n"); rv = secfailure; goto cleanup; } rv = macinit(ctxmac); if (rv != secsuccess) { goto cleanup; } ctxenc = encryptinit(ek, iv, ivlen, ckm_aes_cbc); /* read a buffer of plaintext from input file */ while ((p...
...textlen = pr_read(infile, ptext, sizeof(ptext))) > 0) { /* encrypt using it using cbc, using previously created iv */ if (ptextlen != blocksize) { paddinglength = blocksize - ptextlen; for ( j=0; j < paddinglength; j++) { ptext[ptextlen+j] = (unsigned char)paddinglength; } ptextlen = blocksize; } rv = encrypt(ctxenc, encbuf, &encbuflen, sizeof(encbuf), ptext, ptextlen); if (rv != secsuccess) { pr_fprintf(pr_stderr, "encrypt failure\n"); goto cleanup; } /* save the last block of ciphertext as the next iv */ iv = encbuf; ivlen = encbuflen; /* write the cipher text to intermediate file */ n...
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EncDecMAC using token object - sample 3
or decryption - common code */ pk11context * cryptinit(pk11symkey *key, unsigned char *iv, unsigned int ivlen, ck_mechanism_type type, ck_attribute_type operation) { secitem ivitem = { sibuffer, iv, ivlen }; pk11context *ctx = null; secitem *secparam = pk11_paramfromiv(ckm_aes_cbc, &ivitem); if (secparam == null) { pr_fprintf(pr_stderr, "crypt failed : secparam null\n"); return null; } ctx = pk11_createcontextbysymkey(ckm_aes_cbc, operation, key, secparam); if (ctx == null) { pr_fprintf(pr_stderr, "crypt failed : can't create a context\n"); goto cleanup; } cleanup: if (secparam) { secitem_freeitem(secparam, pr_true); } return ctx; } /* * common encryption and decryption code */ secstatus crypt(pk11context *ctx, unsigned char *out, unsigned int *outlen, unsigned int maxout, unsigned char *in, uns...
...d char ptext[blocksize]; unsigned int ptextlen; unsigned char mac[digestsize]; unsigned int maclen; unsigned int nwritten; unsigned char encbuf[blocksize]; unsigned int encbuflen; secitem noparams = { sibuffer, null, 0 }; pk11context *ctxmac = null; pk11context *ctxenc = null; unsigned int pad[1]; secitem paditem; unsigned int paddinglength; static unsigned int firsttime = 1; int j; ctxmac = pk11_createcontextbysymkey(ckm_md5_hmac, cka_sign, mk, &noparams); if (ctxmac == null) { pr_fprintf(pr_stderr, "can't create mac context\n"); rv = secfailure; goto cleanup; } rv = macinit(ctxmac); if (rv != secsuccess) { goto cleanup; } ctxenc = encryptinit(ek, iv, ivlen, ckm_aes_cbc); /* read a buffer of plaintext from input file */ while ((ptextlen = pr_read(infile, ptext, sizeof(ptext))) > 0) { /* encrypt...
... using it using cbc, using previously created iv */ if (ptextlen != blocksize) { paddinglength = blocksize - ptextlen; for ( j=0; j < paddinglength; j++) { ptext[ptextlen+j] = (unsigned char)paddinglength; } ptextlen = blocksize; } rv = encrypt(ctxenc, encbuf, &encbuflen, sizeof(encbuf), ptext, ptextlen); if (rv != secsuccess) { pr_fprintf(pr_stderr, "encrypt failure\n"); goto cleanup; } /* save the last block of ciphertext as the next iv */ iv = encbuf; ivlen = encbuflen; /* write the cipher text to intermediate file */ nwritten = pr_write(encfile, encbuf, encbuflen); /*pr_assert(nwritten == encbuflen);*/ rv = macupdate(ctxmac, ptext, ptextlen); } rv = macfinal(ctxmac, mac, &maclen, digestsize); if (rv != secsuccess) { pr_fprintf(pr_stderr, "macfinal failure\n"); goto cleanup; } if (maclen == 0...
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NSS Tools modutil
this tool can also create key3.db, cert8.db, and secmod.db security database files.
...the options and arguments for the modutil command are defined as follows: options -create create new secmod.db, key3.db, and cert8.db files.
... arguments -dbdir directory specify the database directory in which to access or create security module database files.
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Scripting Java
the above examples could be expressed as follows: $ java org.mozilla.javascript.tools.shell.main js> importclass(packages.org.mozilla.javascript.context); js> context.currentcontext; org.mozilla.javascript.context@bb6ab6 working with java now that we can access java classes, the next logical step is to create an object.
... implementing java interfaces now that we can access java classes, create java objects, and access fields, methods, and properties of those objects, we have a great deal of power at our fingertips.
... to address this need, rhino provides the ability to create new java objects that implement interfaces.
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JS_InitClass
once js_initclass creates the new class's constructor, it stores the constructor as a property in this object.
...js_initclass always creates a new prototype object that serves as the __proto__ for class instances; parent_proto becomes the __proto__ of that prototype object.
...instead it must create a new object and return it.
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JS_NewObject
creates a new javascript object.
...ject(jscontext *cx, const jsclass *clasp, js::handle<jsobject*> proto, js::handle<jsobject*> parent); jsobject * js_newobjectwithgivenproto(jscontext *cx, const jsclass *clasp, js::handle<jsobject*> proto, js::handle<jsobject*> parent); // added in spidermonkey 1.8 name type description cx jscontext * the context in which to create the new object.
...if this is null, an ordinary javascript object is created.
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History Service Design
for example, is possible to create a query folder containing the 10 pages most visited by the user, allowing to fast find good candidates for bookmarking.
...history service provides the basics to create such adaptive search paths, allowing for a better browsing experience through a common interface.
... database maintenance at startup the service creates an exclusive storage connection to places.sqlite, the exclusive locking is needed for both a perf gain and data-safety.
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Setting up the Gecko SDK
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.
...including this header file in your project ensures that the component you create uses the same defines as the gecko libraries themselves.
... building a microsoft visual cpp project once you set up the gecko sdk, you can create a microsoft visual c++ project to handle component development with the sdk.
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Components.utils.Sandbox
components.utils.sandbox is used to create a sandbox object for use with evalinsandbox().
... creating a sandbox to create a new sandbox, call components.utils.sandbox: var sandbox = components.utils.sandbox(principal[, options]); using new components.utils.sandbox(...) to create a sandbox has the same effect as calling sandbox(...) without new.
... the created sandbox is simply an empty javascript object marked as having been created by the restricted privilege principal.
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nsIDOMXPathEvaluator
to create an instance, use: var domxpathevaluator = components.classes["@mozilla.org/dom/xpath-evaluator;1"] .createinstance(components.interfaces.nsidomxpathevaluator); method overview nsidomxpathexpression createexpression(in domstring expression, in nsidomxpathnsresolver resolver) nsidomxpathnsresolver creatensresolver(in nsidomnode noderesolver); nsisupports evaluate(in domstring expression, in nsidomnode contextnode, in nsidomxpathnsresolver resolver, in unsigned short type, in nsisupports resu...
...lt) methods createexpression() creates an nsidomxpathexpression which can then be used for (repeated) evaluations.
... nsidomxpathexpression createexpression( in domstring expression, in nsidomxpathnsresolver resolver ); parameters expression a string representing the xpath to be created.
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nsILivemarkService
toolkit/components/places/public/nsilivemarkservice.idlscriptable this interface is used to create and reload livemarks.
...to use this service, use: var livemarkservice = components.classes["@mozilla.org/browser/livemark-service;2"] .getservice(components.interfaces.nsilivemarkservice); method overview long long createlivemark(in long long folder, in astring name, in nsiuri siteuri, in nsiuri feeduri, in long index); long long createlivemarkfolderonly(in long long folder, in astring name, in nsiuri siteuri, in nsiuri feeduri, in long index); nsiuri getfeeduri(in long long container); long long getlivemarkidforfeeduri(in nsiuri afeeduri); nsiuri getsiteuri(in long long conta...
...iner); boolean islivemark(in long long folder); void reloadalllivemarks(); void reloadlivemarkfolder(in long long folderid); void setfeeduri(in long long container, in nsiuri feeduri); void setsiteuri(in long long container, in nsiuri siteuri); void start(); void stopupdatelivemarks(); methods createlivemark() creates a new livemark.
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nsIPluginHost
inherits from: nsisupports last changed in gecko 2.0 (firefox 4 / thunderbird 3.3 / seamonkey 2.1) method overview nsifile createtempfiletopost(in string apostdataurl); native code only!
... void createtmpfiletopost(in string apostdataurl, out string atmpfilename); native code only!
... methods native code only!createtempfiletopost to create temp file with content len header in, it will use by http post.
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Using COM from js-ctypes
basis and reference for this article bugzilla :: bug 738501 - implement ability to create windows shortcuts from javascript - comment 4 relavent topic bugzilla :: bug 505907 - support c++ calling from jsctypes converting com code to c code to convert com code to js-ctypes, we need to write c++ vtable pointers in c.
... #include <sapi.h> int main(void) { if (succeeded(coinitialize(null))) { ispvoice* pvoice = null; hresult hr = cocreateinstance(clsid_spvoice, null, clsctx_all, iid_ispvoice, (void**)&pvoice); if (succeeded(hr)) { pvoice->speak(l"hello, firefox!", spf_default, null); pvoice->release(); } } // msdn documentation says that even if coinitalize fails, counitialize // must be called couninitialize(); return 0; } to run the code, save it as test.
... #include <sapi.h> int main(void) { if (succeeded(coinitialize(null))) { struct ispvoice* pvoice = null; hresult hr = cocreateinstance(&clsid_spvoice, null, clsctx_all, &iid_ispvoice, (void**)&pvoice); if (succeeded(hr)) { pvoice->lpvtbl->speak(pvoice, l"hello, firefox!", 0, null); pvoice->lpvtbl->release(pvoice); } } // msdn documentation says that even if coinitalize fails, counitialize // must be called couninitiali...
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Index - Firefox Developer Tools
18 debugger when called as a constructor, the debugger object creates a new debugger instance.
...they can just create and use objects, and when the objects are no longer needed, the runtime takes care of cleaning up, and frees the memory the objects occupied.
... 58 edit css filters css, devtools, filters, page inspector, tools css filter properties in the rules view have a circular gray and white swatch next to them: 59 edit shape paths in css css, devtools, page inspector, rules view, tools, highlighter, shapes the shape path editor is a tool that helps you see and edit shapes created using clip-path and also the css shape-outside property and <basic-shape> values.
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AbstractRange - Web APIs
staticrange a staticrange is a basic range which cannot be changed once it's been created.
...in order to set a range endpoint within the text of an element, be sure to find the text node inside the element: let startelem = document.queryselector("p"); let endelem = startelem.queryselector("span"); let range = document.createrange(); range.setstart(startelem, 0); range.setend(endelem, endelem.childnodes[0].length/2); let contents = range.clonecontents(); document.body.appendchild(contents); this example creates a new range, rng, and sets its starting point to the third child node of the first element whose class is elementclass.
... if you want to create a range that incorporates the contents of the <p> element whose contents are "a <em>very</em> interesting thing happened on the way to the forum...", you can do so like this: let prange = document.createrange(); prange.selectnodecontents(document.queryselector("#entry1 p")); since we wish to select the entire contents of the <p> element, including its descendants, this works perfectly.
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AudioBufferSourceNode - Web APIs
an audiobuffersourcenode can only be played once; after each call to start(), you have to create a new node if you want to play the same sound again.
... fortunately, these nodes are very inexpensive to create, and the actual audiobuffers can be reused for multiple plays of the sound.
... indeed, you can use these nodes in a "fire and forget" manner: create the node, call start() to begin playing the sound, and don't even bother to hold a reference to it.
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AudioContext - Web APIs
you need to create an audiocontext before you do anything else, as everything happens inside a context.
... it's recommended to create one audiocontext and reuse it instead of initializing a new one each time, and it's ok to use a single audiocontext for several different audio source and pipeline concurrently.
...ext" target="_top"><rect x="151" y="1" width="120" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="211" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">audiocontext</text></a></svg></div> a:hover text { fill: #0095dd; pointer-events: all;} constructor audiocontext() creates and returns a new audiocontext object.
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Pixel manipulation with canvas - Web APIs
y * (width * 4) + x * 4; return [red, red + 1, red + 2, red + 3]; }; const colorindices = getcolorindicesforcoord(xcoord, ycoord, canvaswidth); const [redindex, greenindex, blueindex, alphaindex] = colorindices; you may also access the size of the pixel array in bytes by reading the uint8clampedarray.length attribute: var numbytes = imagedata.data.length; creating an imagedata object to create a new, blank imagedata object, you should use the createimagedata() method.
... there are two versions of the createimagedata() method: var myimagedata = ctx.createimagedata(width, height); this creates a new imagedata object with the specified dimensions.
... you can also create a new imagedata object with the same dimensions as the object specified by anotherimagedata.
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Using Fetch - Web APIs
the code would look something like this: fetch('flowers.jpg') .then(response => { if (!response.ok) { throw new error('network response was not ok'); } return response.blob(); }) .then(myblob => { myimage.src = url.createobjecturl(myblob); }) .catch(error => { console.error('there has been a problem with your fetch operation:', error); }); supplying your own request object instead of passing a path to the resource you want to request into the fetch() call, you can create a request object using the request() constructor, and pass that in as a fetch() method argument: const myheaders = new headers(); ...
...const myrequest = new request('flowers.jpg', { method: 'get', headers: myheaders, mode: 'cors', cache: 'default', }); fetch(myrequest) .then(response => response.blob()) .then(myblob => { myimage.src = url.createobjecturl(myblob); }); request() accepts exactly the same parameters as the fetch() method.
... you can even pass in an existing request object to create a copy of it: const anotherrequest = new request(myrequest, myinit); this is pretty useful, as request and response bodies are one use only.
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HTMLTableElement - Web APIs
htmltableelement.createthead() returns an htmlelement representing the first <thead> that is a child of the element.
... if none is found, a new one is created and inserted in the tree immediately before the first element that is neither a <caption>, nor a <colgroup>, or as the last child if there is no such element.
... htmltableelement.createtfoot() returns an htmlelement representing the first <tfoot> that is a child of the element.
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IDBDatabase - Web APIs
the idbdatabase interface of the indexeddb api provides a connection to a database; you can use an idbdatabase object to open a transaction on your database then create, manipulate, and delete objects (data) in that database.
...when a database is first created, this attribute is an empty string.
... idbdatabase.createmutablefile() creates a file handle, allowing files to be stored inside an indexeddb database.
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Basic concepts - Web APIs
because it lets you create web applications with rich query abilities regardless of network availability, these applications can work both online and offline.
...you can create indexes that use any property of the objects for quick searching, as well as sorted enumeration.
...indexeddb, on the other hand, requires you to create an object store for a type of data and simply persist javascript objects to that store.
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SVGSVGElement - Web APIs
svgsvgelement.createsvgnumber() creates an svgnumber object outside of any document trees.
... svgsvgelement.createsvglength() creates an svglength object outside of any document trees.
... svgsvgelement.createsvgangle() creates an svgangle object outside of any document trees.
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A basic 2D WebGL animation example - Web APIs
in this webgl example, we create a canvas and within it render a rotating square using webgl.
...tex-shader" }, { type: gl.fragment_shader, id: "fragment-shader" } ]; shaderprogram = buildshaderprogram(shaderset); aspectratio = glcanvas.width/glcanvas.height; currentrotation = [0, 1]; currentscale = [1.0, aspectratio]; vertexarray = new float32array([ -0.5, 0.5, 0.5, 0.5, 0.5, -0.5, -0.5, 0.5, 0.5, -0.5, -0.5, -0.5 ]); vertexbuffer = gl.createbuffer(); gl.bindbuffer(gl.array_buffer, vertexbuffer); gl.bufferdata(gl.array_buffer, vertexarray, gl.static_draw); vertexnumcomponents = 2; vertexcount = vertexarray.length/vertexnumcomponents; currentangle = 0.0; rotationrate = 6; animatescene(); } after getting the webgl context, gl, we need to begin by building the shader program.
... the array of vertices is created next, as a float32array with six coordinates (three 2d vertices) per triangle to be drawn, for a total of 12 values.
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Using WebRTC data channels - Web APIs
creating a data channel the underlying data transport used by the rtcdatachannel can be created in one of two ways: let webrtc create the transport and announce it to the remote peer for you (by causing it to receive a datachannel event).
...to do this, simply call createdatachannel() without specifying a value for the negotiated property, or specifying the property with a value of false.
... this will automatically trigger the rtcpeerconnection to handle the negotiations for you, causing the remote peer to create a data channel and linking the two together across the network.
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Fundamentals of WebXR - Web APIs
mixed reality is a large and complex subject, with much to learn and many other apis to bring together in order to create an engaging experience for users.
... thus, webxr was created.
...which type of session you want to create is specified when creating the session.
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Using IIR filters - Web APIs
so you can create a highpass filter, or a lowpass filter, or a more bespoke one.
... and this is where the iir filter node is useful — you can create your own if none of the alaready available settings is right for what you want.
... with that all in mind, let's take a look at the code to create an iir filter with the web audio api.
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Web audio spatialization basics - Web APIs
basics of spatialization in web audio, complex 3d spatializations are created using the pannernode, which in layman's terms is basically a whole lotta cool maths to make audio appear in 3d space.
... 3d boombox demo to demonstrate 3d spatialization we've created a modified version of the boombox demo we created in our basic using the web audio api guide.
... let's create our context and listener and set the listener's position to emulate a person looking into our room: const audiocontext = window.audiocontext || window.webkitaudiocontext; const audioctx = new audiocontext(); const listener = audioctx.listener; const posx = window.innerwidth/2; const posy = window.innerheight/2; const posz = 300; listener.positionx.value = posx; listener.positiony.value = posy;...
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Box-shadow generator - CSS: Cascading Style Sheets
true : false; this.topic = topic; this.node = node; var pointer = document.createelement('div'); pointer.classname = 'ui-slider-pointer'; node.appendchild(pointer); this.pointer = pointer; setmousetracking(node, updateslider.bind(this)); sliders[topic] = this; setvalue(topic, this.value); } var setbuttoncomponent = function setbuttoncomponent(node) { var type = node.getattribute('data-type'); var topic = node.getattribute('data-topic'); if (type === "sub...
...'; node.addeventlistener("click", function() { decrement(topic); }); } if (type === "add") { node.textcontent = '+'; node.addeventlistener("click", function() { increment(topic); }); } } var setinputcomponent = function setinputcomponent(node) { var topic = node.getattribute('data-topic'); var unit_type = node.getattribute('data-unit'); var input = document.createelement('input'); var unit = document.createelement('span'); unit.textcontent = unit_type; input.setattribute('type', 'text'); node.appendchild(input); node.appendchild(unit); input.addeventlistener('click', function(e) { this.select(); }); input.addeventlistener('change', function(e) { setvalue(topic, e.target.value | 0); }); subscribe(topic, function(value) { nod...
...ttonmanager */ var buttonmanager = (function checkboxmanager() { var subscribers = []; var buttons = []; var checkbox = function checkbox(node) { var topic = node.getattribute('data-topic'); var state = node.getattribute('data-state'); var name = node.getattribute('data-label'); var align = node.getattribute('data-text-on'); state = (state === "true"); var checkbox = document.createelement("input"); var label = document.createelement("label"); var id = 'checkbox-' + topic; checkbox.id = id; checkbox.setattribute('type', 'checkbox'); checkbox.checked = state; label.setattribute('for', id); if (name) { label.classname = 'text'; if (align) label.classname += ' ' + align; label.textcontent = name; } node.appendchild(checkbox); node.appendchild...
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Introduction to formatting contexts - CSS: Cascading Style Sheets
any block-level element can be made to create a bfc by the application of certain css properties.
... a new bfc is created in the following situations: elements made to float using float absolutely positioned elements (including position: fixed or position: sticky) elements with display: inline-block table cells or elements with display: table-cell, including anonymous table cells created when using the display: table-* properties table captions or elements with display: table-caption block elements where overflow has a value other than visible elements with display: flow-root or display: flow-root list-item elements with contain: layout, content, or strict flex items grid items multicol containers elements with column-span set to all this is useful because a new bfc will behave much like the outermost document in that it becomes a mini-layout inside the main layout.
... setting overflow: auto created a new bfc containing the float.
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Cross-browser audio basics - Developer guides
this article provides: a basic guide to creating a cross-browser html5 audio player with all the associated attributes, properties, and events explained a guide to custom controls 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.
...so the ideal place to create a fallback or inform of incompatibility is before the closing </audio> tag.
...if you don't specify this attribute, no controls will appear — and you will instead have to create your own controls and program their functionality using the media api (see below).
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<input type="date"> - HTML: Hypertext Markup Language
<input> elements of type="date" create input fields that let the user enter a date, either with a textbox that validates the input or a special date picker interface.
...as an example, the date picker on firefox for android looks like this: unsupporting browsers gracefully degrade to a text input, but this creates problems in consistency of user interface (the presented controls are different) and data handling.
... examples in this example, we create 2 sets of ui elements for choosing dates: a native <input type="date"> picker and a set of 3 <select> elements for older browsers that don't support the native date input.
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Grammar and types - JavaScript
this form creates an undeclared global variable.
... constants you can create a read-only, named constant with the const keyword.
...when you create an array using an array literal, it is initialized with the specified values as its elements, and its length is set to the number of arguments specified.
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Numbers and dates - JavaScript
you cannot change the values of these properties and you use them as follows: var biggestnum = number.max_value; var smallestnum = number.min_value; var infinitenum = number.positive_infinity; var neginfinitenum = number.negative_infinity; var notanum = number.nan; you always refer to a property of the predefined number object as shown above, and not as a property of a number object you create yourself.
... unlike many other objects, you never create a math object of your own.
... to create a date object: var dateobjectname = new date([parameters]); where dateobjectname is the name of the date object being created; it can be a new object or a property of an existing object.
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Functions - JavaScript
however, object references are values, too, and they are special: if the function changes the referred object's properties, that change is visible outside the function, as shown in the following example: /* declare the function 'myfunc' */ function myfunc(theobject) { theobject.brand = "toyota"; } /* * declare variable 'mycar'; * create and initialize a new object; * assign reference to it to 'mycar' */ var mycar = { brand: "honda", model: "accord", year: 1998 }; /* logs 'honda' */ console.log(mycar.brand); /* pass object reference to the function */ myfunc(mycar); /* * logs 'toyota' as the value of the 'brand' property * of the object, as changed to by the function.
... here is an example of an anonymous function expression (the name is not used): var myfunction = function() { statements } it is also possible to provide a name inside the definition in order to create a named function expression: var myfunction = function namedfunction(){ statements } one of the benefits of creating a named function expression is that in case we encountered an error, the stack trace will contain the name of the function, making it easier to find the origin of the error.
... the function constructor note: using the function constructor to create functions is not recommended since it needs the function body as a string which may prevent some js engine optimizations and can also cause other problems.
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Array - JavaScript
common operations create an array let fruits = ['apple', 'banana'] console.log(fruits.length) // 2 access an array item using the index position let first = fruits[0] // apple let last = fruits[fruits.length - 1] // banana loop over an array fruits.foreach(function(item, index, array) { console.log(item, index) }) // apple 0 // banana 1 add an item to the end of an array let newlength = fruits.push('orange'...
... creating an array using the result of a match the result of a match between a regexp and a string can create a javascript array.
... [1]: "bb" [2]: "d" constructor array() creates a new array object.
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core/heritage - Archive of obsolete content
pet.prototype = object.create(dog.prototype); // if you want correct instanceof behavior you need to make a dance with // another special `constructor` property of the `prototype` object.
...constructors created using class function don't require new keyword (even though it can be used) for instantiation.
... also, idiomatic sdk code does not uses optional new keywords, but you're free to use it in your add-on code: var fluffy = dog('fluffy'); // instatiation fluffy instanceof dog // => true fluffy instanceof class // => true as you could notice from example above classes created via class function by default inherits from a class itself.
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Getting Started (jpm) - Archive of obsolete content
prerequisites to create add-ons for firefox using the sdk, you'll need: firefox version 38 or later.
... initializing an empty add-on in the command prompt, create a new directory.
... navigate to it, type jpm init, and hit enter: mkdir my-addon cd my-addon jpm init you'll then be asked to supply some information about your add-on: this will be used to create your add-on's package.json file.
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Modifying Web Pages Based on URL - Archive of obsolete content
to create a page-mod, you need to specify two things: one or more content scripts to run whose job is to interact with web content.
... 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 sc...
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Bookmarks - Archive of obsolete content
firefox 2 and earlier creating a new bookmark var win = mybrowser.contentwindow; // get the bookmarks service const bmsvc = components.classes["@mozilla.org/browser/bookmarks-service;1"] .getservice(components.interfaces.nsibookmarksservice); // create the bookmark bmsvc.createbookmarkincontainer(win.document.title, // bookmark name win.location.href.tostring(), // uri of the bookmark null, // shortcut win.document.title, // description win.document.characterset, // charset null, // postdata bookmarksservice.getbookmarkstoolbarfolder(), // bookmark folder ...
...he bookmarks service as is the case with nearly all interfaces, before you can use the bookmarks service, you need to get access to it: var bmsvc = components.classes["@mozilla.org/browser/nav-bookmarks-service;1"] .getservice(components.interfaces.nsinavbookmarksservice); creating a bookmark folder creating a new bookmark folder is done using the nsinavbookmarksservice.createfolder() method.
... for example, to create a new folder in the bookmarks menu: var menufolder = bmsvc.bookmarksmenufolder; // bookmarks menu folder var newfolderid = bmsvc.createfolder(menufolder, "folder name here", bmsvc.default_index); this code locates the bookmarks menu's folder, then creates a new folder named "folder name here" in it.
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Appendix: What you should know about open-source software licenses - Archive of obsolete content
what is important to us now is the following three rights: open source rights: a user can create and distribute copies of the source code; a user can obtain a program’s source code; a user can modify the source code.
... pros and cons the modified bsd license was originally created by the university of california at berkeley for distributing a unix-like operating system.
... however, the fact that software derived from bsd-licensed code can be redistributed under a different license creates the possibility that it will be wrapped in another proprietary program.
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Appendix D: Loading Scripts - Archive of obsolete content
additionally, as sandbox objects can be created with an arbitrary prototype object, the evaluated code can be given access to the global properties of any existing scope.
...let context = content; // create the sandbox let sandbox = components.utils.sandbox(context, { // make properties of the context object available via the // script's global scope sandboxprototype: context, // wrap objects retrieved from the sandbox in xpcnativewrappers.
...the script will execute in the same security context as the current script and will have access to the same globals, but any new globals it creates will be accessible only to the script itself.
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Local Storage - Archive of obsolete content
the common practice is to create a directory with the name of your project at the root of the profile folder, and keep your files inside.
... the structure could be something like this: s435l.default (your profile directory) xulschool log.txt somedbfile.sqlite the directory service and the nsifile interface are used to create the local directory.
... here's what we usually do: we have a function that returns a reference to our root directory and creates it if necessary.
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Setting up an extension development environment - Archive of obsolete content
overview you'll create a new user profile to run your development specific firefox session.
...as we are specifically defining the user profile dev, if you don't have the dev profile already created, the profile selection window opens, where you can create it.
...(linux, mac os x, windows instructions.) you'll see the list of available user profiles one which is default (stable) and other (unstable) profile(s) created automatically when you run other versions of firefox earlier.
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Signing an XPI - Archive of obsolete content
initialize the certificate database decide which folder to create the certificate database in.
... use this command to create it (note the trailing dot is required).
... the dot will cause the database to be created in the current directory.
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Actionscript Acceptance Tests - Archive of obsolete content
you must create a testname.as.avm_args file with the uses_swfversion directive.
...eg: -no-optimize merge| -as3 a dir.asc_args file can also be created with the same contents that will apply to the entire directory.
... here is a more complicated example that passes both avm args, multiple abcs and test args: -ojit |multiabc| $dir/testname_support/a.abc -- test_args a dir.avm_args file can also be created with the same contents that will apply to the entire directory.
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toolbarbutton.type - Archive of obsolete content
if this attribute is not present, a normal button is created.
... you can set this attribute to the value menu to create a button with a menu popup.
... menu: set the type attribute to the value menu to create a button with a menu popup.
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MenuModification - Archive of obsolete content
this method will create a new menuitem element and insert it into the popup.
...the appenditem method will create a menupopup element if it doesn't already exist.
... <script> function addsubmenu() { var popup = document.getelementbyid("file-popup"); var newmenu = document.createelement("menu"); popup.appendchild(newmenu); newmenu.label = "new"; newmenu.appenditem("document", "doc"); newmenu.appenditem("image", "image"); } </script> <menu label="file" onpopupshowing="addsubmenu()"> <menupopup id="file-popup"/> </menu>.
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Popup Guide - Archive of obsolete content
popups and menus there are various types of popups and menus that may be created.
... popup types xul provides a number of different types of elements which may be used to create popup menus or other types of popup widgets, which vary based on the manner in which they are attached to an element and the manner in which they are opened.
...a popup is not created as a separate window or file, instead it is included inside another window or dialog.
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List Controls - Archive of obsolete content
xul provides two types of elements to create lists, a listbox element to create multi-row list boxes, and a menulist element to create drop-down list boxes.
...you would use this to create column headers.
... drop-down lists drop-down lists can be created in html using the select element.
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Scroll Bars - Archive of obsolete content
scroll bars can be created in a number of ways.
... in xul, one can be created using the scrollbar tag.
...a scroll bar creates all of these elements automatically.
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XUL Questions and Answers - Archive of obsolete content
as an extension author, you have at least two options: use dom methods to dynamically create or rearrange elements file an enhancement request in bugzilla to have extra ids added.
...json string) from the server, parsing it on client, and building the menupopup using dom methods (such as document.createelementns).
...*/ how do i create xul elements dynamically in javascript?
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NPN_GetURL - Archive of obsolete content
« gecko plugin api reference « plug-in side plug-in api summary asks the browser to create a stream for the specified url.
...safest target, even though, when used with a mailto or news url, this creates an extra blank the browser instance.
... if the target is null, the browser creates a new stream and delivers the data to the current instance regardless of the mime type of the url.
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Processing XML with E4X - Archive of obsolete content
it is possible to interpolate variables into an xml literal to create an element name (or to create content).
... var h = 'html'; var text = "here's some text"; var doc = <{h}><body>{text}</body></{h}>; alert(doc.toxmlstring()); // gives <html> <body>here's some text</body> </html> working with attributes xml literal syntax has a significant advantage over the xml constructor when you need to create markup dynamically.
...variables and expressions can be used to create attribute values by simply wrapping them with braces ({}) and omitting quotation marks that would normally go around an attribute value, as the following example illustrates: var a = 2; var b = <foo bar={a}>"hi"</foo>; upon execution the variable is evaluated and quotes are automatically added where appropriate.
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Bounding volume collision detection with THREE.js - Game development
instantiating boxes to create a box3 instance, we need to provide the lower and upper boundaries of the box.
... we can easily debug collisions by rendering the meshes that boxhelper creates.
... by default they are created with a linebasicmaterial material (a three.js material for drawing wireframe-style geometries).
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GLSL Shaders - Game development
three.js and other 3d libraries abstract a lot of things for you — if you wanted to create such an example in raw webgl, you'd have to write a lot of extra code to actually make it work.
... create a directory to store your experiments in.
...we'll create a scene featuring a simple cube in this file to explain how the shaders work.
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Implementing game control mechanisms - Game development
streamlining cross device differences creates multiple challenges, not least when providing appropriate controls for different contexts.
... captain rogers was created using the phaser framework, the most popular tool for simple 2d game development in javascript right now, but it should be fairly easy to reuse the knowledge contained within these articles when building games in pure javascript or any other framework.
... every state has its own default methods: preload(), create(), and update().
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Plug-in Development Overview - Gecko Plugin API Reference
plan your plug-in: decide on the services you want the plug-in software to provide and how it will interact with the browser and the special media for which the plug-in is created.
...you can use a variety of environments to create a plug-in, but make sure that you have the necessary files from the plugin sdk.
... create a plug-in project.
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Accessible multimedia - Learn web development
previous overview: accessibility next another category of content that can create accessibility problems is multimedia — video, audio, and image content need to be given proper textual alternatives so they can be understood by assistive technologies and their users.
... to remedy this, we can create our own custom controls.
... create a new file called main.js and save it in the same directory.
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How to build custom form controls - Learn web development
designing new interactions is generally only an option for very large industry players who have enough reach that an interaction they create can become a standard.
... .select { /* this will create a positioning context for the list of options; adding this to .select:focus-within will be a better option when fully supported */ position: relative; /* this will make our control become part of the text flow and sizable at the same time */ display : inline-block; } we need an extra class active to define the look and feel of our control when it is in its active state.
...we've created a similar control to our custom control, that works even if the javascript fails.
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Test your skills: Other controls - Learn web development
other controls 1 in our first "other controls" assessment, we'll get you to create a multi-line text input.
... create a basic multi-line text input.
... try updating the live code below to recreate the finished example: download the starting point for this task to work in your own editor or in an online editor.
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Test your skills: Conditionals - Learn web development
we want you to create a conditional that checks whether season contains the string "summer", and if so assigns a string to response that gives the user an appropriate message about the season.
... try updating the live code below to recreate the finished example: download the starting point for this task to work in your own editor or in an online editor.
... you need to create an if...else structure that checks whether the machine is switched on and puts a message into the response variable if it isn't, telling the user to switch the machine on.
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Useful string methods - Learn web development
when you create a string, for example by using let string = 'this is my string'; your variable becomes a string object instance, and as a result has a large number of properties and methods available to it.
...as my love', 'a happy christmas to all the family', 'you\'re all i want for christmas', 'get well soon']; for (let i = 0; i < greetings.length; i++) { let input = greetings[i]; // your conditional test needs to go inside the parentheses // in the line below, replacing what's currently there if (greetings[i]) { let listitem = document.createelement('li'); listitem.textcontent = input; list.appendchild(listitem); } } </textarea> <div class="playable-buttons"> <input id="reset" type="button" value="reset"> <input id="solution" type="button" value="show solution"> </div> html { font-family: sans-serif; } h2 { font-size: 16px; } .a11y-label { margin: 0; text-align: right; font-size: 0.7rem; width: 98%; } b...
...tmas my love\',' + '\n \'a happy christmas to all the family\',' + '\n \'you\\\'re all i want for christmas\',' + '\n \'get well soon\'];' + '\n' + '\nfor (let i = 0; i < greetings.length; i++) {' + '\n let input = greetings[i];' + '\n if (greetings[i].indexof(\'christmas\') !== -1) {' + '\n let result = input;' + '\n let listitem = document.createelement(\'li\');' + '\n listitem.textcontent = result;' + '\n list.appendchild(listitem);' + '\n }' + '\n}'; let solutionentry = jssolution; 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) {...
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Solve common problems in your JavaScript code - Learn web development
strings how do you create a string in javascript?
... arrays how do you create an array?
... how do you create your own functions?
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Server-side web frameworks - Learn web development
templates are often used to create html, but can also create other types of document.
... productivity: productivity is a measure of how quickly you can create new features once you are familiar with the framework, and includes both the effort to write and maintain code (since you can't write new features while old ones are broken).
...— other factors include: framework purpose/origin: some web frameworks were initially created to solve certain types of problems, and remain better at creating web apps with similar constraints.
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Ember interactivity: Events, classes and state - Learn web development
objective: to learn how to create component classes and use events to control interactivity, and keep track of app state using a service.
... to create a header class to go with your header component, type this in to your terminal: ember generate component-class header this will create the following empty class file — todomvc/app/components/header.js: import component from '@glimmer/component'; export default class headercomponent extends component { } inside this file we will implement the event handler code.
... run this terminal command to generate a service for us to store our todo-list data in: ember generate service todo-data this should give you a terminal output like so: installing service create app/services/todo-data.js installing service-test create tests/unit/services/todo-data-test.js this creates a todo-data.js file inside the todomvc/app/services directory to contain our service, which initially contains an import statement and an empty class: import service from '@ember/service'; export default class tododataservice extends service { } first of all, we want to define what a...
...And 4 more matches

React interactivity: Events and state - Learn web development
handling form submission at the top of the form() component function, create a function named handlesubmit().
... we want our handlesubmit() function to ultimately help us create a new task, so we need a way to pass information from <form /> to <app />.
... handling form submission via callbacks inside the top of our app() component function, create a function named addtask() which has a single parameter of name: function addtask(name) { alert(name); } next, we'll pass addtask() into <form /> as a prop.
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Deployment and next steps - Learn web development
a look behind the svelte compilation process by default, when you create a new app with npx degit sveltejs/template my-svelte-project, svelte will use rollup as the module bundler.
...[y/n] n linked to opensas/mdn-svelte-tutorial (created .vercel) inspect: https://vercel.com/opensas/mdn-svelte-tutorial/[...] [1s] ✅ production: https://mdn-svelte-tutorial.vercel.app [copied to clipboard] [19s] deployed to production.
... first you'll have to register at gitlab and then create a new project.
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Understanding client-side JavaScript frameworks - Learn web development
react tutorials note: react tutorials last tested in may 2020, with react/reactdom 16.13.1 and create-react-app 3.4.1.
...we'll discover a little bit of detail about its background and use cases, set up a basic react toolchain on our local computer, and create and play with a simple starter app, learning a bit about how react works in the process.
...getting started with ember in our first ember article we will look at how ember works and what it's useful for, install the ember toolchain locally, create a sample app, and then do some initial setup to get it ready for development.
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Strategies for carrying out testing - Learn web development
note: some efforts have been made to create publically accessible device labs — see open device labs.
...a good option provided by most virtual machine apps is to create a dynamically allocated hard drive that grows and shrinks as the need arises.
... open the app; you'll be presented with a view like the following: to create a new virtual machine, press the new button in the top left hand corner.
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Configuring Build Options
create a blank mozconfig file: echo "# my first mozilla config" > mozconfig if your mozconfig isn't in your source directory, you can also use the mozconfig environment variable to specify the path to your mozconfig.
...to avoid the time it takes to do a full rebuild, you can create multiple mozconfig files which specify different objdirs.
... you can either create multiple mozconfig files, or alternatively, use the moz_build_projects make option.
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Multiple Firefox profiles
if you want to do this frequently and more easily, you may wish to create an automator application, as explained in this tutorial.
... to start the create profile wizard, click "create profile..." in the profile manager.
... to create the new profile, click finish.
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