.bind in JavaScript

bind_js1.js

this.statusId = 1;
var module = {
    statusId : 4,
    getStatus : function(){
        return this.statusId;
    }
};

console.log(module.getStatus()); //4

var getModuleStatus = module.getStatus;
console.log(getModuleStatus()); //this refers to global //1

var boundGetStatus = getModuleStatus.bind(module);
console.log(boundGetStatus()); //4