async/await && promise

发布: 2017-01-20 13:19:04标签: 前端开发
01<!DOCTYPE html>
02<html lang='en'>
03<head>
04  <meta charset='UTF-8'>
05  <title>Document</title>
06</head>
07<body>
08  <script>
09    function test(num) {
10      return new Promise((resove, reject) => {
11        setTimeout(() => {
12          let random = Math.floor(Math.random() * 100);
13          if (num > random) {
14            resove('成功' + num + ',' + random);
15          } else {
16            reject('失败' + num + ',' + random);
17          }
18        }, 1000)
19      });
20    }
21    (async () => {
22     let  res = await test(50);
23     console.log(res);
24   })()
25 </script>
26</body>
27</html>
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