Source Code of Ext JS Examples

I saw some examples fro开发者_Python百科m a JavaScript library: Ext JS i.e.:

http://dev.sencha.com/deploy/ext-4.0.0/examples/feed-viewer/feed-viewer.html

I have some knowledge about JQuery developed some applications. How can I get sources of that examples to try them myself and what should I download to run them?

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They are in the extjs package /ext-4.0.2a/examples/key-feed-viewer.

Download link:

http://www.sencha.com/products/extjs/download/ext-js-4.0.2/204

UPDATE.

Newest versions of Ext js for download are:

• For Extjs version 4.2.0 you can download it here

• Ext js 5 can download it here ( Ext js 5 has a trial period )