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fetch的异步和同步以及Mock.js使用
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作业代码

  1. <!DOCTYPE html>
  2. <html lang="zh">
  3. <head>
  4.     <meta charset="UTF-8">
  5.     <meta http-equiv="X-UA-Compatible" content="IE=edge">
  6.     <meta name="viewport" content="width=device-width, initial-scale=1.0">
  7.     <title>fetch的异步和同步以及Mock.js使用</title>
  8.     <style type="text/css">
  9.         *{box-sizing:border-box;margin:0;padding:0;}
  10.         body{background-color:#f2f2f2;font-size:16px;}
  11.         h1,h2,h3,h4{margin-bottom:15px;}
  12.         input[type=checkbox]+label,input[type=radio]+label{margin-right:10px;margin-left:5px;height:36px;line-height:36px;}
  13.         button{padding:0 18px;height:36px;border:1px solid transparent;border-radius:2px;background-color:#03a9f4;color:#fff;text-align:center;white-space:nowrap;font-size:14px;line-height:36px;cursor:pointer;}
  14.         button:hover{opacity:.8;}
  15.         pre{display:block;overflow:auto;margin:15px 0;padding:15px;border-radius:6px;background-color:#f5f5f5;color:#333;word-wrap:break-word;font-size:13px;line-height:1.4;word-break:break-all;}
  16.         #app{margin:30px auto;padding:20px;max-width:970px;background-color:#fff;}
  17.         .mock{position:relative;}
  18.         .mock>.refresh{position:absolute;right:0;bottom:0;border:none;border-radius:0 0 6px 0;background-color:#03a9f4;color:#fff;cursor:pointer;}
  19.     </style>
  20. </head>
  21. <body>
  22.     <div id="app">
  23.         <div class="mock">
  24.             <h2>Mock.js 演示</h2>
  25.             <pre></pre>
  26.             <button class="refresh" onclick="mockTest(this)">刷新</button>
  27.         </div>
  29.         <div class="fetch">
  30.             <h2>fetch API演示</h2>
  31.             <div class="btn-group">
  32.                 <button onclick="fetchTest(this, 'GET')">发送GET请求</button>
  33.                 <button onclick="fetchTest(this, 'POST')">异步发送POST请求</button>
  34.                 <button onclick="fetch2Test(this, 'PUT')">同步发送PUT请求</button>
  35.                 <button onclick="fetch2Test(this, 'PATCH')">同步发送PATCH请求</button>
  36.                 <button onclick="fetch2Test(this, 'DELETE')">同步发送DELETE请求</button>
  37.             </div>
  38.             <pre></pre>
  39.         </div>
  40.     </div>
  43.     <script src="https://cdn.staticfile.org/Mock.js/1.0.0/mock-min.js" type="text/javascript" charset="utf-8">
  44.     </script>
  45.     <script type="text/javascript" charset="utf-8">
  46.         document.querySelector('.mock>.refresh').click();
  48.         // mock测试
  49.         function mockTest(ele) {
  50.             let mock = {
  51.                 "id": Mock.mock('@integer(100000, 999999)'),
  52.                 "name": Mock.mock('@cname'),
  53.                 "ip": Mock.mock('@ip'),
  54.                 "region": Mock.mock('@region'),
  55.                 "province": Mock.mock('@province'),
  56.                 "city": Mock.mock('@city')
  57.             }
  58.             ele.parentNode.querySelector('pre').innerHTML = JSON.stringify(mock, null, 2)
  59.         }
  61.         // 异步方式
  62.         function fetchTest(ele, method = 'GET') {
  63.             let obj = getMockData(method);
  64.             fetch(obj.url, obj.option).then(response => response.json()).then(json => {
  65.                 ele.parentNode.parentNode.querySelector('pre').innerHTML = JSON.stringify(json, null, 2)
  66.             });
  67.         }
  69.         // 同步方式
  70.         async function fetch2Test(ele, method = 'GET') {
  71.             let obj = getMockData(method);
  72.             // 1. 等待结果再进行下一步操作,返回响应对象
  73.             const response = await fetch(obj.url, obj.option);
  74.             // 2. 将响应结果,转为json, json()
  75.             const result = await response.json();
  76.             ele.parentNode.parentNode.querySelector('pre').innerHTML = JSON.stringify(result, null, 2)
  77.         }
  79.         // 获取测试数据
  80.         function getMockData(method){
  81.             let url = '';
  82.             let option = {};
  83.             option.method = method;
  84.             option.headers = {
  85.                 'Content-type': 'application/json; charset=UTF-8',
  86.             }
  87.             // GET方法没有 body参数, 其他请求必须要有body
  88.             switch (method) {
  89.                 case 'GET':
  90.                     url = 'https://jsonplaceholder.typicode.com/todos/' + Mock.mock('@integer(1, 200)');
  91.                     break;
  92.                 case 'POST':
  93.                     url = 'https://jsonplaceholder.typicode.com/posts/';
  94.                     option.body = JSON.stringify({
  95.                         userId: Mock.mock('@integer(100000, 999999)'),
  96.                         title: Mock.mock('@ctitle'),
  97.                         body: Mock.mock('@cparagraph'),
  98.                     })
  99.                     break;
  100.                 case 'PUT':
  101.                     url = 'https://jsonplaceholder.typicode.com/posts/' + Mock.mock('@integer(1, 100)');
  102.                     option.body = JSON.stringify({
  103.                         userId: Mock.mock('@integer(100000, 999999)'),
  104.                         title: Mock.mock('@ctitle'),
  105.                         body: Mock.mock('@cparagraph'),
  106.                     })
  107.                     break;
  108.                 case 'PATCH':
  109.                     url = 'https://jsonplaceholder.typicode.com/posts/' + Mock.mock('@integer(1, 100)');
  110.                     option.body = JSON.stringify({
  111.                         title: Mock.mock('@ctitle'),
  112.                     })
  113.                     break;
  114.                 case 'DELETE':
  115.                     url = 'https://jsonplaceholder.typicode.com/posts/' + Mock.mock('@integer(1, 100)');
  116.                     break;
  117.             }
  118.             return {url: url, option: option}
  119.         }
  120.     </script>
  121. </body>
  122. </html>

演示效果

Correcting teacher：PHPzPHPz

Correction status：qualified

Teacher's comments：
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