复制
1Promise.resolve('1')
2  .then(res => {
3    console.log(res)
4  })
5  .finally(() => {
6    console.log('finally')
7  })
8Promise.resolve('2')
9  .finally(() => {
10    console.log('finally2')
11  	return '我是finally2返回的值'
12  })
13  .then(res => {
14    console.log('finally2后面的then函数', res)
15  })
16