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awit的用法,等待执行结果

程序员文章站 2024-02-03 20:07:46
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    <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>