delegate

[akrymski]

Looking at your source it doesn't seem like delegation is done correctly: you can't just compare the event.target, you have to find the closest ancestor matching the selector.

This is how jQuery & Zepto do it, and that's the correct behaviour. Example:

$('body').delegate('li > a', 'click', fn);

If you've clicked a span within the a element then it won't match even though a child of the a element was indeed clicked.

Because of this requirement, firing delegated events is actually quite a bit slower, and is rarely a necessity. I've opted against them in espresso.js and have not had any issues at all.

[airblade]

This seems relevant: whatwg/dom#215.