class Basket {
constructor(order, price, count) {
this.order = order;
this.price = price;
this.count = count;
}
static totalPrice() {
return this.price * this.count;
}
}
let data = new Basket('Milk', 100, 5);
Basket.totalPrice();
Basket.totalPrice.call(data)
. Но, повторюсь, это безумие.