Migrating to jquery 1.4

Question

I would like to upgrade a site from 1.3.2 to 1.4 as I see there are some good performance improvements.

1. Can I simply drop this in or should I be concerned about my plugins working?

2. Is it backward compatible?

3. What should I be worrying about?

Answer 1

Check this page: http://jquery14.com/day-01/jquery-14 (cached version from web.archive.org)

On the bottom there's a list of breaking changes. It will give you an idea if there are issues for you.

There's also a plugin which makes jQuery 1.4 compatible with 1.3.