It can be a Cross-Origin Resource Sharing (CORS) issue.video.crossOrigin = 'anonymous';To enable cross-origin resource sharing, use the following. It allows the images to pass the HTTP header with an image response.Access-Control-Allow-Origin: *You can also use the HTML() method −$('#audio').html('');

HTML5 canvas provides compositing attribute globalCompositeOperation that affect all the drawing operations.ExampleWe can draw new shapes behind existing shapes and mask off certain areas, clear sections from the canvas using globalCompositeOperation attribute as shown below in the example.                    var compositeTypes = [             'source-over','source-in','source-out','source-atop',             'destination-over','destination-in','destination-out',             'destination-atop','lighter','darker','copy','xor'          ];          function drawShape(){             for (i=0;i

HTML5 canvas provides scale(x, y) method that is used to increase or decrease the units in our canvas grid. This can be used to draw scaled down or enlarged shapes and bitmaps.This method takes two parameters where x is the scale factor in the horizontal direction and y is the scale factor in the vertical direction. Both parameters must be positive numbers.ExampleLet us see an example −                    function drawShape(){             // get the canvas element using the DOM             ... Read More

HTML5 canvas provides methods that allow modifications directly to the transformation matrix. The transformation matrix must initially be the identity transform. It may then be adjusted using the transformation methods.ExampleLet us see an example of canvas transformation −                    function drawShape(){             // get the canvas element using the DOM             var canvas = document.getElementById('mycanvas');             // make sure we don't execute when canvas isn't supported             if (canvas.getContext){                // use getContext to use the canvas for drawing                var ctx = canvas.getContext('2d');                var sin = Math.sin(Math.PI/6);                var cos = Math.cos(Math.PI/6);                ctx.translate(200, 200);                var c = 0;                for (var i=0; i

Use HTML with jQuery to achieve this and fire after pressing ENTER −Example                          $(document).ready(function(){             $('input').bind("enterKey",function(e){                alert("Enter key pressed");             });             $('input').keyup(function(e){                if(e.keyCode == 13)                {                   $(this).trigger("enterKey");                }             });          });                             Press Enter key in the above input text.    

To play MP4 video in WebView, you need to first declare Content Provider in Manifest −Implement open file with open() method −URI myURL = URI.create("file:///mypath/new.mp4"); File f = new File(myURL); ParcelFileDescriptor p =    ParcelFileDescriptor.open(f, ParcelFileDescriptor.MODE_READ_ONLY); return p;

The touchstart event is fired when the touchpoint is positioned on the touch surface. Use addEventListener() for touchmove pointer-events −overlay.addEventListener('touchstart', function(ev){    ev.preventDefault(); });Here, we have also used the preventDefault() method. The preventDefault() method prevents the browser from executing the default action.

With CSS3, you can always create shapes like rectangle, triangle, etc.Let us see how −The following is a rectangle −#shape1 {    width: 300px;    height: 150px;    background: blue; }The following is a triangle −#shape2 {    width: 0;    height: 0;    border-left: 200px solid transparent;    border-bottom: 200px solid blue; }

To play a WAV file on iOS Safari, add a content-range header.The headers would allow a WAV file to play −Content-Range: bytes XX-XX/XX Content-Type: audio/wav Content-Disposition: attachment; filename = "new.WAV" Content-Length: XXAbove, new.WAV is our WAV file.

To get the text height, set the font in pt −context.font="15pt Calibri";Now, get the height like the following −var height = parseInt(context.font.match(/\d+/), 10);Above we have used a match to separate the font size from font face.