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Javascript Articles
Page 509 of 534
How to load an HTML file into the canvas?
For this, you can use the SVG elements. Let us see an example: DEMO
Read MoreDoes HTML5 only replace the video aspects of Flash/Silverlight?
Flash provides amazing GUI and many visual features for animations. It allows the user build everything inside a particular platform without a full integration into the browser wrapped inside the browser with the main scopes that are multimedia and other kinds of animation.The HTML5 element gives you an easy and powerful way to draw graphics using JavaScript. It can be used to draw graphs, make photo compositions or do simple (and not so simple) animations.Here is a simple element that has only two specific attributes width and height plus all the core HTML5 attributes like id, name, and ...
Read MoreHow to keep the image at the back of the HTML5 canvas when moving elements with fabric.js?
To keep the image at the back of the canvas, when move elements, you need to pass:preserveObjectStackingAnd the following would work and the image is not visible in the background:window.canvas = new fabric.Canvas('c', { preserveObjectStacking:true });Now, on moving the shape will appear over the image.
Read MoreAn empty box is displayed instead of the rupee symbol in HTML
The rupee symbol is the following and not every browser supports it:₹To make it visible on your web page: You can use the following as well:₹
Read MoreHow to adopt a flex div's width to content in HTML?
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; }
Read MoreUpdate HTML5 canvas rectangle on hover
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(); });
Read MoreHow to create multi-column layout in HTML5 using tables?
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...
Read MoreTwo way communication between the browsing contexts in HTML5
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 MoreHow to send a cross-document message with HTML?
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);
Read MoreHow can I handle Server-Sent Events in HTML5?
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]
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