Using Greasemonkey to load and use jQuery while being considerate to John's bandwidth

When I googled how to use jQuery in a Greasemonkey script — a script to run on a web page that already loads some other, conflicting, JavaScript framework, like Prototype — I found no script that worked. Not a fucking one. They all contained very wrong bits, and I wander why they're still published. They're still indexed so that people like me can experience more pain. Here's what I came up with after much labor. I believe it is fail-proof.


// ==UserScript==
// @name name
// @namespace namespace
// @description Does jQuery stuff while playing nice with other JavaScript frameworks
// @author Caroline Schnapp
// @homepage
// @include *
// ==/UserScript==
// Add jQuery
var script = document.createElement('script');
script.src = '';
// When jQuery is loaded
script.addEventListener('load', function(){ 
  jQuery = unsafeWindow['jQuery'];
  /* You put your jQuery code here, which must use the jQuery namespace. See Note. */
}, false);
Note: Use the “jQuery” namespace, not the dollar sign “$”, in your code.

How it all works — me thinks

My code makes the following assumptions:

jQuery is hosted on Google — I always forget that

You can find a link to google-hosted latest and best jQuery minified right here.