Inject javascript into a javascript function

Question

I\'ve got a weird question in that I need to inject some javascript into another javascript function. I am using a framework which is locked so I can not change the existing fun

Answer 1

Alias it.

var oldDoSomething = doSomething;
doSomething = function() {
  // Do what you need to do.
  return oldDoSomething.apply(oldDoSomething, arguments);
}