JavaScript String prototype
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);
Try it Yourself »
Definition and Usage
The prototype property allows you to add new properties and methods to
existing objects.
Note: prototype is a global property which is available with almost
all JavaScript objects.
Browser Support
prototype is fully supported in all browsers:
| Chrome | IE | Edge | Firefox | Safari | Opera |
| Yes | Yes | Yes | Yes | Yes | Yes |
Syntax
object.prototype.name = valueTechnical Details
| Return Value: | A reference to the String.prototype object |
|---|---|
| JavaScript Version: | ECMAScript 1 |
