Yes, the official specification states cross-origin attribute as:The crossorigin attribute is a CORS settings attribute. Its purpose is to allow images from third-party sites that allow cross-origin access to be used with canvas.You can use it to solve JavaScript errors like to log js errors:if (securityOrigin()->canRequest(targetUrl)) {    msg = ... Read More

To draw large font properly in HTML5 Canvas, you can try to run the following code:var myCanvas = document.getElementById("myCanvas"); var context = c.getContext("2d"); context.font = '180pt Georgia'; context.strokeStyle = "#FF0000"; context.fillStyle = "#FFFFFF "; context.lineWidth = 34; context.fillText("Demo!",0,200); context.strokeText("Demo!",0,200);

To blend, you need to perform blending of two images in proportion 50-50.Let us see how: Blended image    window.onload = function () {       var myImg1 = document.getElementById('myImg1');       var myImg2 = document.getElementById('myImg2');       var myCanvas = document.getElementById("canvas"); ... Read More

A new feature introduced in HTML 5 is the addition of custom data attributes.A custom data attribute starts with data- and would be named based on your requirement.    ... The above will be perfectly valid HTML5 with two custom attributes called data-subject and data-level. You would be able to ... Read More

Here is an example of an error handling function in a Web Worker JavaScript file that logs errors to the console.ExampleWith error handling code, above example would become like the following:           Big for loop                var worker ... Read More

To resize the image before submitting the form, you need to use the drawImage() method.Scale the original image and draws the scaled version on the canvas at [0, 0]context.drawImage( img, 0, 0, img.width, img.height, 0, 0, myWidth, UseHeight );Above, we saw the following:Here, var myWidth = Math.floor( img.width * Scale ... Read More

The HTML5 file Blob.slice() method is useful for creating a Blob object containing the data. This data is in the specified range of bytes of the source Blob. It uses XMLHttpRequest as in the below example.Let us see an example to send and receive binary data using slice(). This example ... Read More

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.

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]          

Change the setTimeout() to use a function reference. It works as the function available at the time the reference.The reference will be transferred to the timeout event callback rather than a string reference:window.setTimeout(startNow, 2000);Set it like the following:setTimeout(startNow, 1000); function startNow () {    alert(‘Working correctly!'); }Read More