What does jQuery use to minify their css and javascript?

I know that they use Google Closure for their Js files in 1.4 开发者_运维百科but what about css?

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jQuery doesn't have any CSS:)

jQuery UI doesn't minify their CSS :)

That being said, I use the YUI Compressor to minify CSS in projects as a build step and it's worked very well, CSS minification isn't that complicated, so it's hard to go wrong here.