Calling document.execCommand('copy'); from the Chrome developer console returns false every time.  Give it a try yourself. Open the console and run it, it never succeeds.  Any idea as to why?...
I try to load an HTML page from a remote server into a PHP script, which should manipulate the HTML with the DOMDocument class. But I have seen, that the DOMDocument class removes some parts of the Javascript, which comes with the HTML page. There ar...
alot of web advertising providers use the old document.write method, in my case AdTech. Is it possible to overwrite the document.write method to defer after the onload event?...
I manipulated a webpage DOM via some js libraries which altered the behaviour of onMouseup onMousedown and onMousemove, among other things which I can't be sure of.   Using a DOM inspector I could see that some of these changes are set as propert...
I'm building 10 buttons on the DOM and want to see if there is a more efficient way of building them because it seems strange to be calling createElement and appendChild 10 times.   <script> function makeAlertButtons () {   var container =...
Every browser I've observed creates a <head> element that's accessible in the DOM even if there are no explicit <head></head> tags in the document's markup.  However, Google Analytics uses the following code for dynamic...
For a legacy app we are rewriting parts of web app with React piece by piece. Because of this can't remove junks of document listeners completely. There are lots of different components all over the page that have listeners on them. This is effec...
I'm trying to understand a hierarchical picture of window, document and iframe.  So, window is simply the browser's window and document is where the DOM exists. The document is loaded in window.  Is creating an iframe much like creating a dia...
I'm trying to detect when my document height changes.  Once it does, I need to run a few functions to help organize my page layout.  I'm not looking for window.onresize.  I need the entire document, which is larger than the window.  How do I...
I am trying to improve my knowledge of javascript and while searching for some "best practices", someone pointed out to me that it is faster to cache the DOM document and then access it through that var instead of accessing the document objec...

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