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Pure JavaScript equivalent of jQuery's $.ready() - how to call a function when the page/DOM is ready

...; <html> <head> </head> <body> Your HTML here <script> // self executing function here (function() { // your page initialization code here // the DOM will be available here })(); </script> </body> </html> For modern browsers (anything from ...
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How to open a local disk file with JavaScript?

...tack Overflow (6/6/2018 - https://stackoverflow.com/questions/13405129/javascript-create-and-save-file ) var eventMouse = document.createEvent("MouseEvents") eventMouse.initMouseEvent("click", true, false, window, 0, 0, 0, 0, 0, false, false, false, false, 0, null) elem.dispatchEvent(eventMous...
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Drawing an image from a data URL to a canvas

...canvas_id'); var ctx = myCanvas.getContext('2d'); var img = new Image; img.onload = function(){ ctx.drawImage(img,0,0); // Or at whatever offset you like }; img.src = strDataURI; Edit: I previously suggested in this space that it might not be necessary to use the onload handler when a data URI i...
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Convert SVG to image (JPEG, PNG, etc.) in the browser

...g+xml;charset=utf-8"}); var url = DOMURL.createObjectURL(svgBlob); img.onload = function () { ctx.drawImage(img, 0, 0); DOMURL.revokeObjectURL(url); if (typeof navigator !== "undefined" && navigator.msSaveOrOpenBlob) { var blob = canvas.msToBlob(); ...
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Difference between DOMContentLoaded and load events

... Fyi, the same MDN link [now] also says: "Note: Stylesheet loads block script execution, so if you have a <script> after a <link rel="stylesheet" ...>, the page will not finish parsing - and DOMContentLoaded will not fire - until the stylesheet is loaded." – Nic...
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Send POST data using XMLHttpRequest

I'd like to send some data using an XMLHttpRequest in JavaScript. 13 Answers 13 ...
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Detect blocked popup in Chrome

I am aware of javascript techniques to detect whether a popup is blocked in other browsers (as described in the answer to this question ). Here's the basic test: ...
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How to add image to canvas

... base_image = new Image(); base_image.src = 'img/base.png'; base_image.onload = function(){ context.drawImage(base_image, 0, 0); } } I.e. draw the image in the onload callback of the image. share | ...
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How to display loading message when an iFrame is loading?

... With the iframe onload function you can remove the CSS background image. – Hugo Cox Oct 20 '17 at 0:09 1 ...
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Is it possible to ping a server from Javascript?

...this: put ping.html on the server with or without any content, on the javascript do same as below: <script> function ping(){ $.ajax({ url: 'ping.html', success: function(result){ alert('reply'); }, error: function(result){ ...