In Javascript, why is the “this” operator inconsistent?

Question

In JavaScript, the \"this\" operator can refer to different things under different scenarios.

Typically in a method within a JavaScript \"object\", it refers to the

Answer 1

As soon as callback methods are called from other context I'm usually using something that I'm call callback context:

var ctx = function CallbackContext()
{
_callbackSender
...
}

function DoCallback(_sender, delegate, callbackFunc)
{
 ctx = _callbackSender = _sender;
 delegate();
}

function TestObject()
{
   test = function()
  {
     DoCallback(otherFunc, callbackHandler);
  }

  callbackHandler = function()
{
 ctx._callbackSender;
 //or this = ctx._callbacjHandler;
}
}