Very few of us have extensive experience in more than one library. JavaScript muddled along without standard libraries for a long time. I use Ruby on Rails, w

Very few of us have extensive experience in more than one library. JavaScript muddled along without standard libraries for a long time. I use Ruby on Rails, which has support for Prototype/Scriptaculous, so that's what I use. I like it a lot better than straight JavaScript. The thing that the libraries do well at is papering over browser differences. One good aspect is they collect "fixes" and tricks that have been spread all over the web and concentrate them one place. I'm mystified why Prototype doesn't download in minified format. It's easy and useful to do but I'm sure most folks don't think of it.