You can use $.ui.version, it’s actually the property jQuery UI looks for when determining if it should load itself (if it’s already there, abort). For example here’s a fiddle including version 1.8.4. Unfortunately, $.ui.version was added in jQuery-UI version 1.6. For earlier versions, you can check for $.ui though. So, in this case, the following … Read more
Apparently, document.addEventListener() is unreliable, and hence, my error. Use window.addEventListener() with the same parameters, instead.
Greasemonkey (usually) doesn’t have jQuery. So the common approach is to use window.addEventListener(‘load’, function() { // your code here }, false); inside your userscript
I use this script in my extension “Grab Any Media” and work fine ( like youtube case ) var oldHref = document.location.href; window.onload = function() { var bodyList = document.querySelector(“body”) var observer = new MutationObserver(function(mutations) { mutations.forEach(function(mutation) { if (oldHref != document.location.href) { oldHref = document.location.href; /* Changed ! your code here */ } }); … Read more
From “User Script Tip: Using jQuery – Erik Vold’s Blog” // ==UserScript== // @name jQuery For Chrome (A Cross Browser Example) // @namespace jQueryForChromeExample // @include * // @author Erik Vergobbi Vold & Tyler G. Hicks-Wright // @description This userscript is meant to be an example on how to use jQuery in a userscript on … Read more
The other answers should probably do the trick, but this one is simpler and does not require jQuery: document.head.querySelector(“[property~=video][content]”).content; The original question used an RDFa tag with a property=”” attribute. For the normal HTML <meta name=”” …> tags you could use something like: document.querySelector(‘meta[name=”description”]’).content
Perhaps you don’t have a recent enough version of Greasemonkey. It was version 0.8 that added @require. // @require https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js If you don’t have 0.8, then use the technique Joan Piedra describes for manually adding a script element to the page. Between version 0.8 and 0.9, @require is only processed when the script is first … Read more
Note: This only works if the image is from the same domain as the page, or has the crossOrigin=”anonymous” attribute and the server supports CORS. It’s also not going to give you the original file, but a re-encoded version. If you need the result to be identical to the original, see Kaiido’s answer. You will … Read more