What microlibraries to use for sdk?

Question

JavaScript

When you just make your site - you can pull anything.
I do something like disqus. For such an embeddable solution, you don’t want to pull jquery - it’s thick for this, and it may not be on the client site.
You can write everything without a framework, but you want to support it up to Ie6. What will result in a nightmare and writing your own framework.
I want something as cross-browser and modular as possible, in order to pull only what is actually used.

Answer 1

We decided to write on Google Closure.
It is much more than just jquery. It will cover the needs even those that we do not yet have.
Fully modular - only the necessary modules will get into the build.
Works perfectly with the closure compilera advanced mod - everything compiled without problems.

Answer 2

You can check for the presence of jquery on the site, and if there is none, then pull your version from some CDN.
But it seems strange to me these days to support IE6-7