Add method to Object class : Object « Object Oriented « JavaScript Tutorial

1. JavaScript Tutorial
2. Object Oriented
3. Object

Since all objects used in JavaScript are inherited from Object, all of the object can use the method added to Object.

Object.prototype.showValue = function () {
    alert(this.valueOf());
};

var str = "hello";
var iNum = 25;
str.showValue();
iNum.showValue();