I'm making a small JS library for building mobile apps that should work on webkit browsers Safari, Chrome. One of the problems to solve was how to implement event delegation.

What is event delegation? I think that very good explanation has David Walsh on his blog post about event delegation and the explanation how various libraries implement event delegation.

So if you are using jQuery you probably know .delegate() and .live() method. Basically what you trying to achieve is to have just one addEventListener that covers big area like the body, table or other portion of your code and avoid to have multiple addEventListener's. I think the .live() method in jQuery have one addEventListener positioned on the body HTML element.

My intention was to build simple yet flexible solution that will work on all modern browsers.