prototyper

Base object for using prototypal inheritance in javascript. Is has a strong dependence on ES5.

Getting Started

Install the module with: npm install prototyper

'use strict';

var Prototyper = require('../lib/Prototyper');

var Person = Prototyper.extend('Person',
    // iVars
    {
        name: 'Unnamed',
        happiness: 10,
        happinessThreshold: 100
    },
    // cVars
    {
        initialize: function initialize(name) {
            if (!name) throw new Error('name is required');
            this.name = name;
        },
        sayName: function sayName() {
            return 'My name is ' + this.name;
        },
        get isHappy() {
            return this.happiness >= this.happinessThreshold;
        }
    },
    // descriptors
    {
        iVars: {
            happinessThreshold: {
                writable: false
            }
        },
        cVars: {
            sayName: {
                writable: false,
                configurable: false
            }
        }
    }
);

var mechi = Person.create('Mechi');

mechi.sayName() // -> 'My name is Mechi'
mechi.name // -> 'Mechi'
mechi.isHappy // -> false
mechi.happiness = 200;
mechi.isHappy // -> true
mechi.happinessThreshold = 0; // -> TypeError: Cannot assign to read only property
                                    'happinessThreshold' of [instance person-1]

mechi.super.objectName // -> 'Person'
mechi.super.toString() // -> '[class Person]'
mechi.super.super.objectName // -> 'Prototyper'
mechi.super.super.toString() // -> '[class Prototyper]'

To-do list

• Documentation
• More examples
• Browser version

Test

Run the command: npm test

License

Copyright (c) 2013 Claudio Romandini
Licensed under the MIT license.