javascript-study-note/index.html at main · hcj0105/javascript-study-note · GitHub

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<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <script>

      /* 面试题一
        script start
        promise1
        2
        script end

        then1
        queueMicrotask1
        then3

        setTimeout1
        then2
        then4

        setTimeout2
      */


       /*
        script start
        getData start
        getData end
        script end
        setTimeout
        then1-res why
      */

      /*
        script start
        getData start
        requestData
        script end
        setTimeout
        then1-res why
        getData end
      */


      /* 面试题二
        script strat
        async1 start
        async2
        promise1
        script end
        async1 end
        promise2
        seTimeout
      */

      async function async1() {
        console.log('async1 start')
        await async2()
        console.log('async1 end')
      }

      async function async2() {
        return new Promise((resolve) => {
          console.log('promise1')
          resolve()
        }).then(() => {
          console.log('then1')
        })
      }

      async1()
      //
      // async1 start、 promise1 then1 async1 end

    </script>
  </body>
</html>