将异步响应转换为标准Javascript对象

function fetchData(callback) {
  // 异步操作，比如发送网络请求
  setTimeout(() => {
    const data = { name: 'John', age: 25 };
    callback(data); // 将结果传递给回调函数
  }, 1000);
}

fetchData((result) => {
  console.log(result); // { name: 'John', age: 25 }
});

function fetchData() {
  return new Promise((resolve, reject) => {
    // 异步操作，比如发送网络请求
    setTimeout(() => {
      const data = { name: 'John', age: 25 };
      resolve(data); // 将结果传递给resolve函数
    }, 1000);
  });
}

fetchData()
  .then((result) => {
    console.log(result); // { name: 'John', age: 25 }
  })
  .catch((error) => {
    console.error(error);
  });

async function fetchData() {
  return new Promise((resolve, reject) => {
    // 异步操作，比如发送网络请求
    setTimeout(() => {
      const data = { name: 'John', age: 25 };
      resolve(data); // 将结果传递给resolve函数
    }, 1000);
  });
}

(async () => {
  try {
    const result = await fetchData();
    console.log(result); // { name: 'John', age: 25 }
  } catch (error) {
    console.error(error);
  }
})();