title: How to run jQuery directly on any page in the browser?
body: <p>Is there some programmatic way (or maybe a browser plugin) that allows users to arbitrarily run any jQuery they want on a webpage that is currently loaded in their browser?</p>
  <p><strong>Edit:</strong></p>
  <p>My motivation is to be able to test jQuery syntax and commands ahead of time on a page and then go add them to its source or suggest tweaks to the webadmins whose pages I experimented with.</p>
  <p>I have been using jQuery from the main site to run the tests. It is currently on 3.5.1: <a href="https://jquery.com/download/" rel="nofollow noreferrer">jQuery download page</a></p>