JavaScript Prototype Properties

Definition and usage

The prototype property gives you the ability to add properties and methods to an object.

Grammar

Object.prototype.name=value

Instance

In this example, we will show how to use the prototype property to add properties to an object:

<script type= "Text/javascript" >function employee (name,job,born) {This.name=name;this.job=job;this.born=born ;} VAR bill=new employee ("Bill Gates", "Engineer", 1985); employee.prototype.salary=null; Bill.salary=20000;document.write (bill.salary);</script>

JavaScript Prototype Properties