How does the load() function allow the user to provide a callback?

Question

In javascript it\'s very popular for libraries/frameworks to let us define a callback function for post-processing of data.

eg.

load(\"5\", function(         


        

Answer 1

function(callback,argumentArray) {
    var result = callback.apply(this,argumentArray);
}

Points to be noted:

• this can be null. In that case if this is used in the callback implementation then it would point to the Global object.
• argumentArray is actually a JavaScript Array of arguments required by the callback method.