前端开发的开始---基于OO的Ajax类
一年都没写过博客了,不是懒,是不知有啥好写的。。。现在本人从一个后台开发.net的转向前端开发了。。。
之前去面试的时候,给面试官问过,有没有属于自己的ajax类,当时很奇怪,因为我基本上ajax开发都是用jquery来完成,后来想了想,也是应该写一个。
先看调用方式:
1 ajax.request("ajax.html",{v:Math.random(),num:1},function(data){
2 //do something
3 },'get');
2 //do something
3 },'get');
方式好像jquery哦。。。还是觉得这样调用方便些。。。
1 var ajax = {
2 //Xmlhttprequest类
3 Xmlhttprequest :function() {
4 this.xhr =false;
5 },
6 //外部调用接口
7 request : function(url,data,callback,type) {
8 //每次都创建一个Xmlhttprequest的对象,使ajax调用互不影响
9 var xhr = new this.Xmlhttprequest();
10 xhr.request(url,data,callback,type);
11 }
12 }
13 //将{num:1,t:'a'}这种json数据格式转为num=1&t=a这种字符串形式
14 var json2str = function(data){
15 var _data = [];
16
17 for(var name in data) {
18 _data.push(name+"="+data[name]);
19 }
20 return _data.join('&');
21 }
22 //扩展Xmlhttprequest类的方法
23 ajax.Xmlhttprequest.prototype = {
24 //创建XMLHttpRequest
25 createXmlHttpRequest : function(){
26
27 if(window.XMLHttpRequest) {
28 return new XMLHttpRequest();
29 }
30 else {
31 var a = ["Msxml2.XMLHTTP","Microsoft.XMLHTTP","Msxml2.XMLHTTP.5.0","Msxml2.XMLHTTP.4.0","Msxml2.XMLHTTP.3.0"];
32 for (var i=0,l=a.length;i<l;i++){
33 try{
34 return new ActiveXObject(a[i]);
35 }catch(e){};
36 }
37 }
38 },
39 //回调函数
40 fnCallback : function(callback){
41
42 if(this.xhr.readyState === 4 && this.xhr.status === 200) {
43 callback?callback(this.xhr.responseText):void(0);
44 }
45 },
46 //ajax请求
47 request : function(url, data, callback, type){
48
49 var that = this;
50 var ispost = type==='post'?true:false;
51
52 !ispost && (url += (url.indexOf('?')+1?'&':'?') + json2str(data));
53
54 this.xhr = this.createXmlHttpRequest();
55
56 this.xhr.open(type,url,true);
57 ispost?this.xhr.setRequestHeader("Content-Type","application/x-www-form-urlencoded"):'';
58 this.xhr.onreadystatechange = function(){that.fnCallback(callback);};
59 this.xhr.send(ispost?json2str(data):null);
60 }
61 }
2 //Xmlhttprequest类
3 Xmlhttprequest :function() {
4 this.xhr =false;
5 },
6 //外部调用接口
7 request : function(url,data,callback,type) {
8 //每次都创建一个Xmlhttprequest的对象,使ajax调用互不影响
9 var xhr = new this.Xmlhttprequest();
10 xhr.request(url,data,callback,type);
11 }
12 }
13 //将{num:1,t:'a'}这种json数据格式转为num=1&t=a这种字符串形式
14 var json2str = function(data){
15 var _data = [];
16
17 for(var name in data) {
18 _data.push(name+"="+data[name]);
19 }
20 return _data.join('&');
21 }
22 //扩展Xmlhttprequest类的方法
23 ajax.Xmlhttprequest.prototype = {
24 //创建XMLHttpRequest
25 createXmlHttpRequest : function(){
26
27 if(window.XMLHttpRequest) {
28 return new XMLHttpRequest();
29 }
30 else {
31 var a = ["Msxml2.XMLHTTP","Microsoft.XMLHTTP","Msxml2.XMLHTTP.5.0","Msxml2.XMLHTTP.4.0","Msxml2.XMLHTTP.3.0"];
32 for (var i=0,l=a.length;i<l;i++){
33 try{
34 return new ActiveXObject(a[i]);
35 }catch(e){};
36 }
37 }
38 },
39 //回调函数
40 fnCallback : function(callback){
41
42 if(this.xhr.readyState === 4 && this.xhr.status === 200) {
43 callback?callback(this.xhr.responseText):void(0);
44 }
45 },
46 //ajax请求
47 request : function(url, data, callback, type){
48
49 var that = this;
50 var ispost = type==='post'?true:false;
51
52 !ispost && (url += (url.indexOf('?')+1?'&':'?') + json2str(data));
53
54 this.xhr = this.createXmlHttpRequest();
55
56 this.xhr.open(type,url,true);
57 ispost?this.xhr.setRequestHeader("Content-Type","application/x-www-form-urlencoded"):'';
58 this.xhr.onreadystatechange = function(){that.fnCallback(callback);};
59 this.xhr.send(ispost?json2str(data):null);
60 }
61 }
这个类,肯定有不足的了,欢迎拍砖吧!每个人都有自己的习惯用法,最重要是适合用就行了!