测试代码

  1. function a() {
  2.     let res = 1;
  3.     return new Promise((resolute, reject) => {
  4.         setTimeout(() => {
  5.                res = 2;
  6.             resolute(res);
  7.             console.log('执行')
  8.         },2000);
  9.     })
  10. }
  12. async function b() {
  13.     const res = await a();
  14.     console.log('data', res)
  15. }
  17. b();

结果

  1. 执行
  2. data 2
  3. [Finished in 2.1s]