复制
1function promise1 () {
2  let p = new Promise((resolve) => {
3    console.log('promise1');
4    resolve('1')
5  })
6  return p;
7}
8function promise2 () {
9  return new Promise((resolve, reject) => {
10    reject('error')
11  })
12}
13promise1()
14  .then(res => console.log(res))
15  .catch(err => console.log(err))
16  .finally(() => console.log('finally1'))
17
18promise2()
19  .then(res => console.log(res))
20  .catch(err => console.log(err))
21  .finally(() => console.log('finally2'))
22