如何使用异步返回字符串

function asyncFunc(callback) {
  setTimeout(() => {
    callback('Hello, World!');
  }, 1000);
}

asyncFunc((result) => {
  console.log(result);
});

function asyncFunc() {
  return new Promise((resolve, reject) => {
    setTimeout(() => {
      resolve('Hello, World!');
    }, 1000);
  });
}

asyncFunc().then((result) => {
  console.log(result);
}).catch((error) => {
  console.error(error);
});

function delay(ms) {
  return new Promise((resolve) => setTimeout(resolve, ms));
}

async function asyncFunc() {
  await delay(1000);
  return 'Hello, World!';
}

(async () => {
  try {
    const result = await asyncFunc();
    console.log(result);
  } catch (error) {
    console.error(error);
  }
})();