27 Apr 2012 4:09 AM #1
Basic of Ext JS
30 Apr 2012 12:42 PM #2
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Panel extends Container and the reason why one extends another is there is functionality in Container that Panel wants to use so Panel extends Container. If it didn't then you would have to duplicate code which would blow the library up quite a bit.
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30 Apr 2012 9:48 PM #3
Thanks mitchell to have a good answer.