When to use .bind() in JS

Question

There is a ton of blogs and posts about how to use bind() and how it\'s different than call() and apply(), but there is very little ex

Answer 1

This is possibly the simplest way to explain it in a practical sense. Since most answers have given a theoretical definition and explanation, I will show a straightforward use case. You would use bind when you want to the function being called to have a different this value than the default one.

var NS = {
  user     : "self",
  getUser  : function() { return this.user; }
};

var CLOSURE = NS.getUser;

// error user is undefined, "this" in that context refers to the global object, "window"
console.log(CLOSURE());

// Bind the function call to NS object
console.log(CLOSURE.bind(NS)());

http://jsfiddle.net/ev3z3td3/2/