1 <!DOCTYPE html>
2 <html>
3 <head>
4 <meta charset="utf-8">
5 <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
6 <title>Examples</title>
10 <script>
11
12 //将对象序列化
13 function params(data) {
14 var arg = [];
15 for (var i in data) {
16 arr.push(encodeURIComponent(i) + '=' + encodeURIComponent(data[i]));
17 }
18 return arr.join('&');
19 }
20
21 //封装ajax
22 function ajax(obj) {
23 //创建xhr对象;
24 obj.xhr = new XMLHttpRequest();
25 //后面随机数防止浏览器缓存
26 obj.url = url + "?rand=" + Math.random();
27 //序列化对象
28 obj.data = params(obj.data);
29 //当是get请求时
30 if (obj.method = 'get') {
31 //当前面没设置随机数时
32 obj.url += obj.url.indexOf('?') == -1 ? '?' +obj.data : '&' + obj.data;
33 }
34 //异步调用
35 if (obj.async == true) {
36 //监听响应状态
37 xhr.onreadystatechange = function() {
38 if (xhr.readyState == 4) {
39 callback();
40 }
41 };
42 }
43 //启动HTTP请求
44 xhr.open(obj.method, obj.url, obj.aysnc);
45 //当是post请求时
46 if(obj.method === 'post') {
47 //模仿表单提交
48 xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
49 //发送HTTP请求-post
50 xhr.send(obj.data);
51 } else {
52 //发送HTTP请求-get
53 xhr.send(null);
54 }
55 //同步调用
56 if (obj.async == false) {
57 callback();
58 }
59 //回调函数传参
60 function callback() {
61 if (xhr.atatus == 200) {
62 obj.success(xhr.responseText);
63 } else {
64 alert("失败，失败状态码：" + xhr.status);
65 }
66 }
67 }
68
69 document.addEventListener('click', function() {
70 ajax({
71 method: 'get',
72 url: 'demo3.php',
73 data: {
74 'name' = 'Lee',
75 'age' = 100
76 },
77 success: function(text) {
78 alert(text);
79 },
80 async = true
81 });
82 }, false);
83 </script>
84 </head>
85 <body>
86
87 </body>
88 </html>
