在类javascript类构造函数中使用异步调用

class MyClass {
  constructor() {
    this.data = null;
    this.init();
  }

  async init() {
    this.data = await fetchData(); // 异步调用，等待数据返回
    console.log(this.data);
  }
}

async function fetchData() {
  // 异步操作，例如发送网络请求或者读取文件
  return new Promise((resolve, reject) => {
    setTimeout(() => {
      resolve('Data fetched');
    }, 1000);
  });
}

const myObject = new MyClass();

class MyClass {
  constructor() {
    this.data = null;
    this.init().then((result) => {
      this.data = result;
      console.log(this.data);
    });
  }

  init() {
    return new Promise((resolve, reject) => {
      fetchData().then((data) => {
        resolve(data);
      }).catch((error) => {
        reject(error);
      });
    });
  }
}

function fetchData() {
  return new Promise((resolve, reject) => {
    setTimeout(() => {
      resolve('Data fetched');
    }, 1000);
  });
}

const myObject = new MyClass();