Javascript Articles - Page 549 of 671

Ember.js is an open-source, free JavaScript client-side framework used for developing web applications.It allows building client-side JavaScript applications by providing a complete solution which contains datamanagement and application flow.It uses the MVC(Model-View-Controller) architecture pattern. In Ember.js, the route is used as a model,handlebar template as view and controller manipulates the data in the model.The following browsers are supported for Ember −Internet ExplorerMicrosoft EdgeSafari

To set the triangle at the center and at the bottom of div, use the following. You need to set left to 50% −.demo: after {    position: absolute;    border-top: solid 50px #e15915;    border-left: solid 50px transparent;    border-right: solid 50px transparent;    top: 100%;    left: 50%;    margin-left: -50px;    width: 0;    height: 0; }

The last-child selector is used to select the last child element of a parent. It cannot be used to select the last child element with a specific class under a given parent element.Style the last child li element with background-color −li:last-child{    background-color: blue; }It creates issues if the element is not the very last element.Let us see an example of −If your selector is a:last-child, this works −        This will be selected

To get the video duration, query the readyState attribute. It has a series from 0 to 4. When the metadata has loaded, the value you will get is 1.Therefore, you need to do something like −window.setInterval(function(tm) {    // Using readyState attriute    if (video.readyState > 0) {       var duration = $('#duration').get(0);       // for video duration       var video_duration = Math.round(video.duration);       duration.firstChild.nodeValue = video_duration;       clearInterval(tm);    } },1000);

The frameset attribute deprecated in HTML, but you can still use it. The top-level parent doc now usesExampleXHTML and the frame uses HTML5.                            

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.When it is combined with CORS header, it would allow images defined by the element, loaded from foreign origins to be used in canvas. The procedure would be like being loaded from the current origin.You can use it to solve JavaScript errors like to log js errors −if (securityOrigin()->canRequest(targetUrl)) {    msg = myError;    line = myLineNumber;    source = sourceURL; } else {    msg = "Error!";    source = String();    line = 0; }

To repopulate, use the drag and drop. This was not possible before, but now it is valid.Let us see how −function drop(ev) {    ev.stopPropagation();    ev.preventDefault();      // retrieving dataTransfer field from the event    var d = ev.dataTransfer;    var files = d.files;    handleFiles(files); }For drag and drop −// dragging target.addEventListener('dragover', (ev) => {    ev.preventDefault();    body.classList.add('dragging'); }); // drag leave target.addEventListener('dragleave', () => {    body.classList.remove('dragging'); }); // drop target target.addEventListener('drop', (ev) => {    ev.preventDefault();    body.classList.remove('dragging'); });

The elements and are useful for screenreaders as well and help visually impaired users in reading the content of your web page. These are beneficial for eBook readers as well.Let us see how to work with both the elements.           HTML Section Tag                        Java          Inheritance          Inheritance defines the relationship between superclass and subclass.                              Learning          Learn to gain experience and try to share your knowledge with others.                       Web Development Tutorials             Consist of CSS, HTML, and PHP tutorials for 2nd Semester exams.                                 Academic Tutorials             Consist of Computer Fundamental, Computer Network tutorials for             1st Semester exams.                    

To convert HTML5 canvas to PNG, follow the below-given steps −You need to add the generated data URL to the href attribute of an tag.Dialog for base64 image −Add a filename −Now define http headers −headers=Content-Disposition: attachment; filename=newimg.pngTo deal with the RAM of the web browser and make its utilization less −// generated the data URL dynamically function myCanvas() {    var d = canvas.toDataURL('image/png');    this.href = d; }; d.addEventListener('click', myCanvas, false);

The flex property is a shorthand for the flex-grow, flex-shrink, and flex-basis properties. The flex property sets the flexible length on flexible items.For example −#container article {    -webkit-flex: 1 1 auto;    overflow-y: auto;    height: 0px; /*here the height is set to 0px*/ }If you want a min-height, the use height: 100px; that it is exactly the same as − min-height: 100px;#container article {    -webkit-flex: 1 1 auto;    overflow-y: auto;    height: 100px; /*here the height is set to 100px*/ }