async/await在类的方法的使用

As a final note before we move on, you can even add async in front of class/object methods to make them return promises, and await promises inside them. Take a look at the ES class code we saw in our object-oriented JavaScript article, and then look at our modified version with an async method:

class Person {
  constructor(first, last, age, gender, interests) {
    this.name = {
      first,
      last
    };
    this.age = age;
    this.gender = gender;
    this.interests = interests;
  }

  async greeting() {
    return await Promise.resolve(`Hi! I'm ${this.name.first}`);
  };

  farewell() {
    console.log(`${this.name.first} has left the building. Bye for now!`);
  };
}

let han = new Person('Han', 'Solo', 25, 'male', ['Smuggling']);
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The first class method could now be used something like this:

han.greeting().then(console.log);
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