JavaScript Constructor Pattern Native

by horhey

JavaScript

// constructor
var Rectangle = function(width, height) {
    this.width = width;
    this.height = height;
};

Rectangle.prototype.area = function() {
    return this.width * this.height;
};

var myRect = new Rectangle(2, 2);
window.console.log('myRect area is %d', myRect.area()); // returns 4

// inheritance
var Square = function(size) {
    Rectangle.call(this, size, size);
};

Square.prototype = new Rectangle();
Square.prototype.constructor = Square;

var mySquare = new Square(4);
window.console.log('mySquare area is %d', mySquare.area()); // returns 16