awit的用法,等待执行结果

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>awit函数</title>
</head>
<body>
    <script>
       function shui () {
           return new Promise((reslove, reject) => {
                setTimeout(() => {
                    console.log('shui')
                    reslove('shui')
                }, 5000)
           })
       }
       function hai () {
           return new Promise((reslove, reject) => {
                setTimeout(() => {
                    console.log('hai')
                    reslove('hai')
                }, 10000)
           })
       }
       async function waitMe() {
        let a = await shui() // 1. 等待执行shui  5秒后 console.log('shui')
        let b = await hai() // 2. 等待执行完 hai 然后10s执行 console.log('hai')
        console.log(a + b) // shuihai
       }
       waitMe()
    </script>
</body>
</html>

  

posted @ 2019-11-13 13:37  曾经的水哥  阅读(1284)  评论(0编辑  收藏  举报