jQuery API help

Do we have a document for jQUery 1.4.2..something that says this was there in 1.3.2 and has changed now in 1.4.2

Does the jQuery s开发者_如何学编程ite has an official documentation that can be downloaded?

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They DO have a change log, it's available at: http://api.jquery.com/category/version/1.4.2/ and http://api.jquery.com/category/version/1.4/ ... hopefully that's what you're looking for.

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It would be nice if they had a change log, but this is the next best thing: jQuery 1.4 Released – Full Release Notes

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In relation to the second part of your question, the documentation is obviously available online at api.jquery.com but you can also download a Windows CHM file of it here.