extend-light

extend-light - npm

extend-light defines class in JavaScript.
This is simple module providing a simple Class function to simplify class definition in JavaScript.

Easy to use, easy to inherit/extend.

no difficult keywords,
no prototype, no __proto__,
no Object.defineProperty, no Object.setPrototypeOf, etc ...
needs constructor only.

Supports Google Chrome, Mozilla Firefox, Microsoft ie11/10/9/8/7/6 and Node.js/io.js.

Japanese version/■日本語版はこちら■

INSTALL:

$ npm install extend-light

or

http://lightspeedworks.github.io/extend-light/extend-light.js

<script src="http://lightspeedworks.github.io/extend-light/extend-light.js"></script>

USAGE:

var extend = require('extend-light');

method: [BaseClass].extend([proto], [staticProps])

Define new class (constructor function) that inherited from Base Class.

Format

var YourClass = extend([proto], [staticProps]);
var YourSubClass = YourClass.extend([proto], [staticProps]);

Parameters

• BaseClass: Base class or Super class for inherits
• proto: the prototype object for your class, optional
  • constructor or new: constructor function, optional
  • any methods: any method or member function, optional
  • statics: the object for class or static properties, optional
    • any methods: any method or member function, optional
• staticProps: the object for class or static properties, optional
  • any methods: any static method or class function, optional

You have to omit staticProps also, if you omit proto.
You have to specify proto or {}, if you want to specify staticProps.

Returns

The newly defined class (constructor function). (Your class is subclass of BaseClass)

Details

A simple and quick sample:

var extend = require('extend-light');
 
var MyClass = extend({
  constructor: function MyClass(value) {
    this.value = value;
  },
  show: function show() {
    console.log(this.value);
  }
});
 
var myObj = new MyClass(5);
myObj.value++; // 5 -> 6
myObj.show();
myObj.value++; // 6 -> 7

EXAMPLES:

// Animal
 
// extend
var extend = require('extend-light');
 
// SimpleClass
var SimpleClass = extend('SimpleClass');
var s1 = new SimpleClass();
 
// Animal
var Animal = extend({
  constructor: function Animal(name) {
    if (!(this instanceof Animal))
      return new Animal(name);
    this.name = name;
  },
  introduce: function () {
    console.log('My name is ' + this.name);
  }
}, {
  animalClassMethod: function () {
    console.log('Animal class method');
  }
});
var a1 = new Animal('Annie');
a1.introduce(); // -> My name is Annie
Animal.animalClassMethod(); // -> Animal class method
 
// Bear
var Bear = Animal.extend('Bear');
var b1 = Bear('Pooh'); // new less
b1.introduce(); // -> My name is Pooh
 
var Cat = Animal.extend({
  constructor: function Cat(name) {
    if (!(this instanceof Cat))
      return new Cat(name);
    Cat.super_.apply(this, arguments);
  }
});
var c1 = new Cat('Kitty');
c1.introduce(); // -> My name is Kitty
 
var Dog = Animal.extend({
  constructor: function Dog(name) {
    if (!(this instanceof Dog))
      return new Dog(name);
    Dog.super_.apply(this, arguments);
  },
}, {
  init: function () {
    console.log('Dog class init');
  },
  dogClassMethod: function () {
    this.animalClassMethod();
    console.log('Dog class method');
  }
}); // -> Dog init
var d1 = new Dog('Hachi');
d1.introduce(); // -> My name is Hachi
Dog.dogClassMethod(); // -> Animal class method, Dog class method
Dog.animalClassMethod(); // -> Animal class method

SEE ALSO:

base-class-extend - npm

get-constructors - npm

LICENSE:

MIT