Javascript Articles - Page 428 of 534

Use display: inline-flex to adopt a flex div’s width to content:#box {    display: inline-flex;    flex-direction: row;    flex-wrap: wrap;    max-width: 200px;    padding: 10px;    margin: 20px;    background-color: blue; }

To update HTML5 canvas rectangle on hover, try to run the following code:var canvas = document.getElementById("myCanvas"); var context = canvas.getContext("2d"); context.rect(20,20,150,100); context.stroke(); $(canvas).hover(function(e){    context.fillStyle = blue;    context.fill(); });

FabricJS has the following API methods that change the z-index of objects:canvas.sendBackwards(myObject) canvas.sendToBack(myObject) canvas.bringForward(myObject) canvas.bringToFront(myObject)You can also use:fabric.Canvas.prototype.orderObjects = function(compare) {    this._objects.sort(compare);    this.renderAll(); }

A byte order mark (BOM) consists of the character code U+FEFF at the beginning of a data stream, where it can be used as a signature defining the byte order and encoding form, primarily of unmarked plaintext files.Many Windows programs (including Windows Notepad) add the bytes 0xEF, 0xBB, 0xBF at the start of any document saved as UTF-8. This is the UTF-8 encoding of the Unicode byte order mark (BOM), and is commonly referred to as a UTF-8 BOM even though it is not relevant to byte order.For HTML5 document, you can use a Unicode Byte Order Mark (BOM) character ... Read More

Design your webpage to put your web content on multiple pages. You can keep your content in the middle column, you can use left column to use menu, and right column can be used to put an advertisement or some other stuff.Example           Three Column HTML Layout                                                    Main Menu                HTML                PHP                PERL...                                        Technical and Managerial Tutorials                                        Right Menu                HTML                PHP                PERL...                                

The following is the list of features that can be detected by Modernizr −FeatureCSS PropertyJavaScript Check@font-face.fontfaceModernizr.fontfaceCanvas.canvasModernizr.canvasCanvas Text.canvastextModernizr.canvastextHTML5 Audio.audioModernizr.audioHTML5 Audio formatsNAModernizr.audio[format]HTML5 Video.videoModernizr.videoHTML5 Video FormatsNAModernizr.video[format]rgba().rgbaModernizr.rgbahsla().hslaModernizr.hslaborder-image.borderimageModernizr.borderimageborder-radius.borderradiusModernizr.borderradiusbox-shadow.boxshadowModernizr.boxshadowMultiple backgrounds.multiplebgsModernizr.multiplebgsOpacity.opacityModernizr.opacityCSS Animations.cssanimationsModernizr.cssanimationsCSS Columns.csscolumnsModernizr.csscolumnsCSS Gradients.cssgradientsModernizr.cssgradientsCSS Reflections.cssreflectionsModernizr.cssreflectionsCSS 2D Transforms.csstransformsModernizr.csstransformsCSS 3D Transforms.csstransforms3dModernizr.csstransforms3dCSS Transitions.csstransitionsModernizr.csstransitionsGeolocation API.geolocationModernizr.geolocationInput TypesNAModernizr.inputtypes[type]Input AttributesNAModernizr.input[attribute]localStorage.localstorageModernizr.localstoragesessionStorage.sessionstorageModernizr.sessionstorageWeb Workers.webworkersModernizr.webworkersapplicationCache.applicationcacheModernizr.applicationcacheSVG.svgModernizr.svgSVG Clip Paths.svgclippathsModernizr.svgclippathsSMIL.smilModernizr.smilWeb SQL Database.websqldatabaseModernizr.websqldatabaseIndexedDB.indexeddbModernizr.indexeddbWeb Sockets.websocketsModernizr.websocketsHashchange Event.hashchangeModernizr.hashchangeHistory Management.historymanagementModernizr.historymanagementDrag and Drop.draganddropModernizr.draganddropCross-window Messaging.crosswindowmessagingModernizr.crosswindowmessagingaddTest() Plugin APINAModernizr.addTest(str, fn)Read More

Two-way communication between the browsing contexts is called channel messaging. It is useful for communication across multiple origins.While creating messageChannel, it internally creates two ports to send the data and forwarded to another browsing context.postMessage() − Post the message throw channelstart() − It sends the dataclose() − it close the portsIn this scenario, we are sending the data from one iframe to another iframe. Here we are invoking the data in function and passing the data to DOM.var loadHandler = function(){    var mc, portMessageHandler;    mc = new MessageChannel();    window.parent.postMessage('documentAHasLoaded', 'http://foo.example', [mc.port2]);    portMessageHandler = function(portMsgEvent){     ... Read More

Create a new web browsing context either by creating new iframe or new window. We can send the data using with postMessage() and it has two arguments. They are asmessage − The message to sendtargetOrigin − Origin nameLet us see an example to send a message from iframe to button:var iframe = document.querySelector('iframe'); var button = document.querySelector('button'); var clickHandler = function(){    iframe.contentWindow.postMessage('The message to send.','https://www.tutorialspoint.com); } button.addEventListener('click',clickHandler,false);

To handle Server-Sent Events in HTML5, you can try to run the following code:                    document.getElementsByTagName("eventsource")[0].addEventListener("server-time", eventHandler, false);          function eventHandler(event)          {             // Alert time sent by the server             document.querySelector('#ticker').innerHTML = event.data;          }                                                    [TIME]          

Session StorageThe Session Storage is designed for scenarios where the user is carrying out a single transaction but could be carrying out multiple transactions in different windows at the same time.Local StorageThe Local Storage is designed for storage that spans multiple windows and lasts beyond the current session. In particular, Web applications may wish to store megabytes of user data, such as entire user-authored documents or a user's mailbox, on the client side for performance reasons.HTML5 introduces the localStorage attribute which would be used to access a page's local storage area without no time limit and this local storage will ... Read More