Perfection kills » What’s wrong with extending the DOM
I was recently surprised to find out how little the topic of DOM extensions is covered on the web. What’s disturbing is that downsides of this seemingly useful practice don’t seem to be well known, except in certain secluded circles. The lack of information could well explain why there are scripts and libraries built today that still fall into this trap. I’d like to explain why extending DOM is generally a bad idea, by showing some of the problems associated with it. We’ll also look at possible alternatives to this harmful exercise.