使用异步迭代器来链接承诺

// 定义一个异步迭代器
const asyncIterator = {
  [Symbol.asyncIterator]() {
    let i = 0;
    return {
      async next() {
        if (i < promises.length) {
          const result = await promises[i];
          i++;
          return { value: result, done: false };
        }
        return { done: true };
      }
    };
  }
};

// 定义一组承诺
const promises = [
  new Promise(resolve => setTimeout(() => resolve('Promise 1'), 1000)),
  new Promise(resolve => setTimeout(() => resolve('Promise 2'), 2000)),
  new Promise(resolve => setTimeout(() => resolve('Promise 3'), 3000))
];

// 使用异步迭代器链接承诺
(async () => {
  for await (const result of asyncIterator) {
    console.log(result);
  }
})();