I'm trying to simulate a keyboard event in Safari using JavaScript.  I have tried this:  var event = document.createEvent("KeyboardEvent"); event.initKeyboardEvent("keypress", true, true, null, false, false, false, false, 115, 0...
Please note that Object.Watch and Object.Observe are both deprecated now (as of Jun 2018).    I was looking for an easy way to monitor an object or variable for changes, and I found Object.watch(), that's supported in Mozilla browsers, but not...
If I for example have   <p> some long text </p>   on my HTML page, how can I know that cursor of mouse is for example above the word 'text'?...
Is it possible to get the mouse position with JavaScript after page loads without any mouse movement event (without moving the mouse)?...
I'm writing a Greasemonkey script for a site which at some point modifies location.href.  How can I get an event (via window.addEventListener or something similar) when window.location.href changes on a page? I also need access to the DOM of th...
Is it possible to have an event in JS that fires when the value of a certain variable changes? JQuery is accepted....
Is there any chance to detect every file selection the user made for an HTML input of type file element?   This was asked many times before, but the usually proposed onchange event doesn't fire if the user select the same file again....
Lets suppose I've a link on my page:  <a href="#" id="foo">Click Here</a>   I don't know anything else, but when I click on the link, an alert("bar") is displayed. So I know that somewhere, some code is g...
I'm trying to add an onclick event to a table row through Javascript.  function addRowHandlers() {     var table = document.getElementById("tableId");     var rows = table.getElementsByTagName("tr");     for (i = 1; i < rows....
I have sensitive files to download to users, and each user is permitted to download a given file exactly once.  If the download fails, I want to permit the re-download, but not otherwise.  It's not sufficient to rely on logging/processing the f...

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