Introduction to Marionette.js – The Backbone Framework/

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Calling the Constructor with the Apply Function

Calling the Constructor with the Apply Function

Learn how to use the Apply function with constructors.

We'll cover the following...

When calling the original constructor, we pass in the first two original arguments:

var NewConstructor = function(){
  var obj = new OldConstructor(arguments[0], arguments[1]);
  // code truncated for brevity
};
Passing the original arguments (assets/js/apps/config/storage/localstorage.js)

We can get away with this because we know exactly how our configureStorage function will be used—to configure local storage for models and collections. Luckily, both have two arguments in their constructor signature, so passing on two arguments to the original constructor will always work as expected. ...