jsinheritance v1.0.1

jsinheritance

Install

npm install jsinheritance

Example

  var Define = require('jsinheritance');

  //Define Shape class as usually using prototype pattern
  var Shape = function Shape(properties) {
    this.position = properties.position || {x:0 , y:0};
  };
  //Define Shape class extends Object class
  Define(Shape).as('Object');
  Shape.prototype.toString = function() {
    return "I am a Shape at " + this.position;
  };
  Shape.prototype.move = function(x, y) {
    this.position.x += x;
    this.position.y += y;
  };


  //Define Rectangle class as usually using prototype pattern
  var Rectangle = function Rectangle(properties) {
    Rectangle.super(this, properties); //Call super constructor
    this.width = properties.width;
    this.height = properties.height;
  };
  //Define Rectangle class extends Shape class and save super constructor
  //Important: this line must be after the constructor and before prototype functions definition
  Rectangle.super = Define(Rectangle).as(['Shape']);

  Rectangle.prototype.toString = function() {
    return "I am a Rectangle!" + JSON.stringify(this);
  };
  Rectangle.prototype.getArea = function() {
    return this.width * this.height;
  };

  //Define Square class as usually using prototype pattern
  var Square = function Square(properties) {
    //Transform the constructor arguments before calling the super constructor
    var parentProps = {
        width: properties.size,
        height: properties.size,
        position: properties.position
    };
    Square.super(this, parentProps); //Call super constructor
  };
  //Define Square class extends Rectangle class and save super constructor
  //Important: this line must be after the constructor and before prototype functions definition
  Square.super = Define(Square).as(['Rectangle']);
  Square.prototype.toString = function() {
    return "I am a Square!" + JSON.stringify(this);
  };

  //Now create the instance of the objects
  var square = new Square({size: 100});
  var rect = new Rectangle({width: 100, height: 200});
  console.log('square',square); // It prints the type of the object!! :)
  console.log('rect', rect); // It prints the type of the object!! :)
  rect.move(10, 10);
  console.log('rect', rect);