Can anyone recommend a wiki engine with great support for implementing client-side javascript or jquery?
I’d like to take an existing wiki engine, and it pains me to say it, but add “gmail like” file uploading. I’m sure this can be done with a lot of wiki engines but I’d like to know if any have good support for doing this sort of thing.
Instead of reinventing the wheel, you might like to take a look at existing file upload widgets. Here are a few for MediaWiki:
http://www.mediawiki.org/wiki/Extension:UploadWizard
http://www.mediawiki.org/wiki/Extension:Add_Media_Wizard
If you do want to roll your own, MediaWiki has reasonable JavaScript support built in:
http://www.mediawiki.org/wiki/Manual:Interface/JavaScript