复制
1async function async1 () {
2  await async2();
3  console.log('async1');
4  return 'async1 success'
5}
6async function async2 () {
7  return new Promise((resolve, reject) => {
8    console.log('async2')
9    reject('error')
10  })
11}
12async1().then(res => console.log(res))