Load external JS from bookmarklet?

How can I load an external JavaScript file using a bookmarklet? This would overcome the URL length limitations of IE and generally keep things cleaner.

Solution 1:

2015 Update

Content security policy will prevent this from working in many sites now. For example, the code below won't work on Facebook.

2008 answer

Use a bookmarklet that creates a script tag which includes your external JS.

As a sample:

javascript:(function(){document.body.appendChild(document.createElement('script')).src='** your external file URL here **';})();

Solution 2:

Firefox and perhaps others support multiline bookmarklets, no need for one liner. When you paste in the code it just replaces newlines with spaces.

javascript:
var q = document.createElement('script');
q.src = 'http://svnpenn.github.io/bm/yt.js';
document.body.appendChild(q);
void 0;

Example