JavaScript String prototype Property

JavaScript String Reference JavaScript String Reference

Example

Use the prototype property to add a new property to all objects of a given type:

function employee(name, jobtitle, born) {
    this.name = name;
    this.jobtitle = jobtitle;
    this.born = born;
}
employee.prototype.salary = 2000;

var fred = new employee("Fred Flintstone", "Caveman", 1970);

The value of fred.salary will be:

2000

Try it yourself »

Definition and Usage

The prototype property allows you to add new properties and methods to existing object types.

Note: Prototype is a global property which is available with almost all JavaScript objects.


Browser Support

Property
prototype Yes Yes Yes Yes Yes

Syntax

object.prototype.name = value

Technical Details

Return Value: A reference to the String.prototype object
JavaScript Version: 1.1

JavaScript String Reference JavaScript String Reference

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