String Object - Prototype : Property

Table of content

1 String Object : Prototype Property Definition and Usage

String Object : Prototype Property Definition and Usage

The prototype property allows you to add properties and methods to an object.
Prototype is a global property.
Prototype is available with almost all JavaScript objects.

Script :

<html>
<body>
<script type="text/javascript">
function person(name,age)
  {
  this.name=name;
  this.age=age;
  }
var p1=new person("John",21);
person.prototype.gender=null;
p1.gender = "male";
document.write( p1.name + " is " + p1.gender);
</script>
</body>
</html>

Output :

John is male

Explanation :

var p1=new person("John",21);

Above Statement will create Person object and we are passing two Constructor Parameters.
Thus our Person object will have two properties - name and age

function person(name,age)
  {
  this.name=name;
  this.age=age;
  }

Now we are going to create our Third Property using Prototype Property of String Object.

Creating Property and Assigning Value

person.prototype.gender=null;
p1.gender = "male";