JavaScript Object 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;
const fred = new employee("Fred Flintstone", "Caveman", 1970);
Try it Yourself »
Definition and Usage
The prototype is a global property available with all JavaScript objects.
The prototype property allows you to add new properties and methods to objects.
Syntax
object.prototype.name = value
Browser Support
prototype is an ECMAScript1 (ES1) feature.
ES1 (JavaScript 1997) is fully supported in all browsers:
| Chrome | IE | Edge | Firefox | Safari | Opera |
| Yes | Yes | Yes | Yes | Yes | Yes |
