node.js中的类方法

class Person {
  constructor(name, age) {
    this.name = name;
    this.age = age;
  }

  sayHello() {
    console.log(`Hello, my name is ${this.name} and I am ${this.age} years old.`);
  }
}

const person1 = new Person('Alice', 30);
person1.sayHello(); // 输出：Hello, my name is Alice and I am 30 years old.

class Person {
  constructor(name, age) {
    this.name = name;
    this.age = age;
  }

  sayHello = () => {
    console.log(`Hello, my name is ${this.name} and I am ${this.age} years old.`);
  }
}

const person1 = new Person('Alice', 30);
person1.sayHello(); // 输出：Hello, my name is Alice and I am 30 years old.