承诺按添加顺序解决的顺序不同

在Promise链中使用async/await或.then()来确保Promise按照添加顺序解决。

示例代码：

// 使用async/await的示例
async function orderPromise() {
  const promise1 = new Promise((resolve) => setTimeout(() => resolve(1), 1000));
  const promise2 = new Promise((resolve) => setTimeout(() => resolve(2), 500));
  const promise3 = new Promise((resolve) => setTimeout(() => resolve(3), 100));
  
  const result1 = await promise1;
  const result2 = await promise2;
  const result3 = await promise3;
  
  console.log(result1, result2, result3);
}
orderPromise(); // 输出：1 2 3

// 使用.then()的示例
Promise.resolve()
  .then(() => new Promise((resolve) => setTimeout(() => resolve(1), 1000))))
  .then((result) => {
    console.log(result); // 输出：1
    return new Promise((resolve) => setTimeout(() => resolve(2), 500));
  })
  .then((result) => {
    console.log(result); // 输出：2
    return new Promise((resolve) => setTimeout(() => resolve(3), 100));
  })
  .then((result) => {
    console.log(result); // 输出：3
  });