03.js

const User = {
  name: "fraxken",
  callGreet: 0,
  addProperty() {
    return Reflect.set(this, "hello", "world!");
  },
  greet() {
    this.callGreet = this.callGreet > 2 ? 0 : this.callGreet + 1;

    return `hello ${this.name}`;
  }
};

export default Object.seal(User);