discodeClass

class Box {
    constructor(x, y, w, h) {
        this.x = x;
        this.y = y;
        this.w = w;
        this.h = h;
    }
    log(val) {
        console.log(val);
    }
}

var box = new Box(0, 0, 10, 10);
console.log(box.w);