1. async function testSometing() {
    2.   console.log('执行testSomething') // 2
    3.   return 'testSomething'
    4. }
    5. async function testAsync() {
    6.   console.log('执行testAsync') // 6
    7.   return Promise.resolve('hello async')
    8. }
    9. async function test() {
    10.   console.log('test start...') // 1
    11.   const v1 = await testSometing()
    12.   console.log(v1) // 5
    13.   const v2 = await testAsync()
    14.   console.log(v2) // 8
    15.   console.log(v1, v2) // 9
    16. }
    17. test()
    18. var promise = new Promise((resolve) => {
    19.   console.log('promise start...') // 3
    20.   resolve('promise')
    21. })
    22. promise.then((val) => console.log(val)) // 7
    23. console.log('test end...') // 4