Javascript Object Function Scoping

Question

Let's say I have a class:

var asdf = new Class({
  myFunction: function () {
    //some stuff here
  },
  anotherFunction: function() {
    globalObject.dosomethingandusecallback( 
      function() { // this is the callback
        //how do I call myFunction() here? I can't seem to get it to work?
      }
    );
  }
});

I seem to have some scoping problems in trying to call myFunction within the definition of my callback function. What am I missing here? I thought it should have access to myFunction in this context?

Thanks!

David Tang · Accepted Answer · 2010-12-03 06:10:51Z

3

Copy the this keyword into a variable outside of the callback function, and use that variable inside the callback:

anotherFunction: function() {
  var self = this;
  globalObject.dosomethingandusecallback( 
    function() { // this is the callback
      self.myFunction();
    }
  );
}

answered Dec 3, 2010 at 6:10

David Tang

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