const person = {
  name: 'Alice',
  greet() {
    return `Hello, I'm ${this.name}`;
  },
  farewell: () => `Goodbye from ${this.name}`
};

const greetFn = person.greet;
const farewellFn = person.farewell;

console.log(person.greet());
console.log(greetFn());
console.log(farewellFn());