What are the differences between normal and slim package of jquery?

Question

At CDNJS jquery.slim package is placed. It has a smaller size. What are the major differences from an original? A quick look at the code didn't bring the answer, and at the https://jquery.com I've not found any reference about slim package.

So, what are the differences between jquery.js and jquery.slim.js?

Answer 1

The short answer taken from the announcement of jQuery 3.0 Final Release :

Along with the regular version of jQuery that includes the ajax and effects modules, we’re releasing a “slim” version that excludes these modules. All in all, it excludes ajax, effects, and currently deprecated code.

The file size (gzipped) is about 6k smaller, 23.6k vs 30k.