Yes, and not DOM manipulation. Its the anonymous functions, closures, functional...

twism on Aug 19, 2008 | parent | context | favorite | on: Ask YC: What's on your "Holy Shit" list?

Yes, and not DOM manipulation. Its the anonymous functions, closures, functional programming, scopes and contexts, etc... pair it with Rhino and the power of "dynamic scopes" and shared scopes and you have multi-threaded programming.