Clases en js

gistfile1.txt

// Old
function Poligono(height, width) {
    this.height = height;
    this.width = width;
}

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

var c = new Poligono(10, 10);

console.log(c.area());

// ES6
class Poligono {
    constructor(height, width) {
        this.height = height;
        this.width = width;
    }

    get area() {
        return this.calcArea();
    }

    calcArea() {
        return this.height * this.width;
    }
}

var c = new Poligono(10, 10);

console.log(c.area);