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Przykład dziedziczenia z użyciem prototypu

function Shape(color){ this.x = 4; this.y = 4; this.color = color; this.move = function(dx, dy){ this.x+=dx; this.y+=dy;

function Circle(color){ this.r = 2; this.color = color;

}

Circle.prototype = new Shape(); function Square(color){ this.a = 2; this.color = color;

}

Square.prototype = new Shape(); var myćircle = new Circle("black"); var mySquare = new Square("red");