Are there any good reasons NOT to use jQuery instead of plain old JavaScript? [closed]

Question

I recently discovered jQuery, and I can immediately see how useful and elegant it is.

I'm curious, though - are there any reasons NOT to use it (and just use plain old JavaScript instead)? If there aren't any reasons, should it not be integrated fully into the JavaScript language?

Answer 1

If you don't actually use any of the features of jQuery, there's no reason to introduce the page weight to your site. If you do use any of the features, there's probably not a good reason to roll your own version except for learning purposes.