Override Backbone.sync but save its previous functionality

Question

I'd like to override Backbone.sync but also have the original Backbone.sync functionality run after my additions. I guess kind of like calling super on a superclass in Java. Is there a way to do this other than copying all the previous code over?

Answer 1

In JavaScript, you can store any property or method in a variable. The following example will assign Backbone.sync to another variable and then at the end of your function call it with all the variables that are passed to your new Backbone.sync function.

var originalSync = Backbone.sync;
Backbone.sync = function() {
    // Your code here.
    return originalSync.apply(Backbone, arguments);
};