How can I use jQuery in Greasemonkey scripts in Google Chrome?

Question

As some of you may know, Google Chrome has put some severe limitation on Greasemonkey scripts.

Chromium does not support @require,

Answer 1

I have written a few functions based on the Erik Vold's script to help run me run functions, code and other scripts in a document. You can use them to load jQuery into the page and then run code under the global window scope.

Example Usage

// ==UserScript==
// @name           Example from http://stackoverflow.com/q/6834930
// @version        1.3
// @namespace      http://stackoverflow.com/q/6834930
// @description    An example, adding a border to a post on Stack Overflow.
// @include        http://stackoverflow.com/questions/2246901/*
// ==/UserScript==

var load,execute,loadAndExecute;load=function(a,b,c){var d;d=document.createElement("script"),d.setAttribute("src",a),b!=null&&d.addEventListener("load",b),c!=null&&d.addEventListener("error",c),document.body.appendChild(d);return d},execute=function(a){var b,c;typeof a=="function"?b="("+a+")();":b=a,c=document.createElement("script"),c.textContent=b,document.body.appendChild(c);return c},loadAndExecute=function(a,b){return load(a,function(){return execute(b)})};

loadAndExecute("//ajax.googleapis.com/ajax/libs/jquery/1.6.2/jquery.min.js", function() {
    $("#answer-6834930").css("border", ".5em solid black");
});

You can click here to install it, if you trust that I'm not trying to trick you into installing something malicious and that nobody has edited my post to point to something else. Reload the page and you should see a border around my post.

Functions

load(url, onLoad, onError)

Loads the script at url into the document. Optionally, callbacks may be provided for onLoad and onError.

execute(functionOrCode)

Inserts a function or string of code into the document and executes it. The functions are converted to source code before being inserted, so they lose their current scope/closures and are run underneath the global window scope.

loadAndExecute(url, functionOrCode)

A shortcut; this loads a script from url, then inserts and executes functionOrCode if successful.

Code

function load(url, onLoad, onError) {
    e = document.createElement("script");
    e.setAttribute("src", url);

    if (onLoad != null) { e.addEventListener("load", onLoad); }
    if (onError != null) { e.addEventListener("error", onError); }

    document.body.appendChild(e);

    return e;
}

function execute(functionOrCode) {
    if (typeof functionOrCode === "function") {
        code = "(" + functionOrCode + ")();";
    } else {
        code = functionOrCode;
    }

    e = document.createElement("script");
    e.textContent = code;

    document.body.appendChild(e);

    return e;
}

function loadAndExecute(url, functionOrCode) {
    load(url, function() { execute(functionOrCode); });
}