const point = {
  x: 1,
  y: 2,
  arr: [1, 2],
  print: function () {
    console.log(`Point:(${this.x},${this.y}) ${this.arr}`);
  },
};

function ColorPoint(obj) {
  function f() {}
  f.prototype = obj;
  return new f();
}

const cp = ColorPoint(point);
cp.print(); // Point:(1,2) 1,2
cp.arr.push(10086);

const cp2 = Object.create(point);
cp2.print(); // Point:(1,2) 1,2,10086

console.log(cp instanceof ColorPoint); // false