Question

I understand passing in a function to another function as a callback and having it execute, but I’m not understanding the best implementation to do that. I’m looking for a very basic example, like this:

var myCallBackExample = {     myFirstFunction : function( param1, param2, callback ) {         // Do something with param1 and param2.         if ( arguments.length == 3 ) {             // Execute callback function.             // What is the 'best' way to do this?         }     },     mySecondFunction : function() {         myFirstFunction( false, true, function() {             // When this anonymous function is called, execute it.         });     } }; 

In myFirstFunction, if I do return new callback(), then it works and executes the anonymous function, but that doesn’t seem like the correct approach to me.

Answer 1

You can just say

callback(); 

Alternately you can use the call method if you want to adjust the value of this within the callback.

callback.call( newValueForThis); 

Inside the function this would be whatever newValueForThis is.