JavaScript Prototype Properties

Definition and usage

The prototype property allows you to add properties and methods to an object

Note: Prototype is a global property that applies to all JavaScript objects.

Grammar Object.prototype.name=value

　　

The instance applies the prototype property to the object to add properties: <script>function Employee (name,jobtitle,born) {this.name=name;this.jobtitle= Jobtitle;this.born=born;} VAR fred=new employee ("Fred Flintstone", "Caveman", 1970); employee.prototype.salary=null;fred.salary=20000; document.write (fred.salary);</script> above instance output: 20000

　　

JavaScript Prototype Properties