Learn the fundamentals of JavaScript variable scope and common “execution context” (scope) challenges associated with early/late binding of event handlers, specifically within complex Ext JS layouts. We’ll also bring several patterns (namespaced references, Function closures, inline references, ref/refOwner, and the “Poor-man’s message bus”) to bear on the bowl of soup we call “scope.
https://www.youtube.com/watch?v=RnpPDoSzpYs