Javascript Articles - Page 488 of 607

To create a frame by frame animation in HTML5 with canvas, try to run the following code:var myImageNum = 1; var lastImage = 5; var context = canvas.getContext('2d'); var img = new Image; img.onload = function(){    context.clearRect( 0, 0, context.canvas.width, context.canvas.height );    context.drawImage( img, 0, 0 ); }; var timer = setInterval( function(){    if (myImageNum > lastImage){       clearInterval( timer );    }else{       img.src = "images/left_hnd_"+( myImageNum++ )+".png";    } }, 1000/15 );

HTML5 applicationCacheIt can be understood by an example that a web application is cached, and accessible without a connected internet. Application cache has some advantages: users can use the application when they're offline, cached resources load faster and reduced server load. Browser cache Web browsers use caching to store HTML web pages by storing a copy of visited pages. After that, the copy is used to render when you visit that page again

To get the value of the HTML attribute, try the following:$("#demo").attr("tabindex")The attr() method can be used to either fetch the value of an attribute from the first element in the matched set or set attribute values onto all matched elements.You can also use the hasAttribute() method to see if there is an attribute for an element.ExampleTry to run the following code to learn how to use hasAttribute() method:                          $(document).ready(function(){             $('button').on('click', function() {                if (this.hasAttribute("style")) {                   alert('True')                } else {                   alert('False')                }             })          });                              Button                      Button 2          

If a blank image is shown with the toBase64Image() function, you need to use the following to work on it correctly:animation: {    duration: 2000,    onComplete: function (animation) {       this.toBase64Image();    } }With that, you can also use another fix. Call save64Img(myChart.toBase64Image()) over an additional callback and set it like this:myLine = {    onAnimationComplete: function () {       save64Img(myChart.toBase64Image());    } }

To get the value of radio select, add [$index] to each ng-model like the following: India USThe above would give you the result dynamically in AngularJS.

To display the mobile website correctly, try the following fix:mywebview.scalesPageToFit = YES; mywebview.contentMode = UIViewContentModeScaleAspectFit;You can also set the following:NSString *js = [NSString stringWithFormat:@"document.body.style.zoom = 0.8;"]; [webView stringByEvaluatingJavaScriptFromString:js];

To allow HTML5 input type = ”number” to accept dashes, use a regular expression.Add the regular expression in the pattern attribute as shown below.[ 0 - 9 ] + ([ - \, ] [0 - 9] + ) ? "Add it to the code now:input type = "text" pattern = "[0-9]+([-\,][0-9]+)?" name = "my-num" title = "dashes or comma"/>The above will allow you to add dashes in number. However, above you need to use input type text for the solution to work.

Use the following to check the compatibility of the HTML5 tag :var $myEL = $(''); $myEL.appendTo('body'); var bgColor = $myEL.css('backgroundColor'); if (/rgb\(255\, 255\, 0\)/.test(bgColor))    return true; else    return false;

Add some config to assign trust to your videos in HTML5:app.config(function($sceDelegateProvider) {    $sceDelegateProvider.resourceUrlWhitelist([    // allowing same origin resource loads    'self',    // allowing loading from our assets domain    'http://media.w3.org/**']); });

The filters to be applied must be formed in a single filter call. Set like this:progid : DXImageTransform.Microsoft.BasicImage(grayscale = 1)The CSS should work like the following:.demo {    background: transparent;    -ms-filter: "progid:DXImageTransform.Microsoft.gradient(startColorstr = #00FFFFFF,endColorstr = #00FFFFFF)    progid:DXImageTransform.Microsoft.BasicImage(grayscale = 1)"; /* IE8 */    zoom: 1; }