Overriding Extjs classes and invoking callParent

Question

I have a few months of experience developing Extjs web application. I ran into this problem:

When I override a class, I modified the method and followed the previous imp

Answer 1

You can't use callParent but you can just call the grandparent class method directly instead.

GrandparentClass.prototype.finishedLayout.apply(this, arguments);

Here's a more generic (if somewhat fragile) approach.

this.superclass.superclass[arguments.callee.$name].apply(this, arguments);