Javascript “this” pointer within nested function

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In JavaScript the this object is really based on how you make your function calls.

In general there are three ways to setup the this object:

  1. someThing.someFunction(arg1, arg2, argN)
  2. someFunction.call(someThing, arg1, arg2, argN)
  3. someFunction.apply(someThing, [arg1, arg2, argN])

In all of the above examples the this object will be someThing.
Calling a function without a leading parent object will generally get you the global object which in most browsers means the window object.

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