'use strict'; class Point { constructor(x, y) { this.x = x; this.y = y; } move(x, y) { this.x += x; this.y += y; } } // Usage const p1 = new Point(10, 20); console.log(p1); const c1 = Object.assign({}, p1); Object.setPrototypeOf(c1, Point.prototype); c1.move(-5, 10); console.log(c1); console.log(''); const line = [new Point(0, 0), new Point(10, 10)]; console.log(line); const clone = Object.assign({}, line); console.log(clone);