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How can I change an element's class with JavaScript?

...ction changeClass(){ // Code examples from above } window.onload = function(){ document.getElementById("MyElement").addEventListener( 'click', changeClass); } </script> ... <button id="MyElement">My Button</button> (Note that the window.onload part is...
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Application_Error not firing when customerrors = “On”

... <script type="text/C#" runat="server"> protected override void OnLoad(EventArgs e) { base.OnLoad(e); Response.StatusCode = (int) System.Net.HttpStatusCode.InternalServerError; } </script> This block tells the page to be served with the correct status code....
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Can you autoplay HTML5 videos on the iPad?

...g. a click event). Basically, a user-initiated play button works, but an onLoad="play()" event does not. For example, this would play the movie: <input type="button" value="Play" onclick="document.myMovie.play()"> Whereas the following would do nothing on iOS: <body onload="documen...
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How can I mock dependencies for unit testing in RequireJS?

...18n = stubs.i18n; stubs.i18n = { load: sinon.spy(function(name, req, onLoad) { onLoad(i18n); }) }; _.each(stubs, function(value, key) { var stubName = 'stub' + key + cnt; map[key] = stubName; define(stubName, function() { return value; }); }); return...
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Using PUT method in HTML form

... xhr.setRequestHeader( "Content-Type", "application/json" ); xhr.onload = () => { if ( xhr.status === 200 ) { // reload() uses cache, reload( true ) force no-cache. I reload the page to make "redirects normal effect" of HTML form when submit. You can manipulate DOM instead...
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How to get and set the current web page scroll position?

...in hidden variables. Then in the html of the refreshed page I use <body onLoad="window.scrollTo(x,y), where x and y are those from the hidden values values! – xyz Nov 4 '10 at 14:32 ...
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Drawing an SVG file on a HTML5 canvas

...ks with some bugs (but nightly has fixed them). var img = new Image(); img.onload = function() { ctx.drawImage(img, 0, 0); } img.src = "http://upload.wikimedia.org/wikipedia/commons/d/d2/Svg_example_square.svg"; Live example here. You should see a green square in the canvas. The second green sq...
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how to stop browser back button using javascript

...) { global.location.hash = _hash; } }; global.onload = function () { noBackPlease(); // disables backspace on page except on input fields and textarea.. document.body.onkeydown = function (e) { var elm = e.target.nodeName....
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Javascript: Extend a Function

...reToo(); }); But in your specific case, it's easier to extend the global onload function: extendFunction('onload', function(args) { doSomethingHereToo(); }); I actually really like your question, it's making me think about different use cases. For javascript events, you really want to add an...
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How can I tell if a DOM element is visible in the current viewport?

...onDOMContentLoaded', handler); // Internet Explorer 9+ :( attachEvent('onload', handler); attachEvent('onscroll', handler); attachEvent('onresize', handler); } */ If you do any DOM modifications, they can change your element's visibility of course. Guidelines and common pitfalls: M...