Detailed explanation of code examples of Vue encapsulation ajax
This article brings you a detailed explanation of the code examples of Vue encapsulation ajax. It has certain reference value. Friends in need can refer to it. I hope it will be helpful to you.
HTML file:
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<div id="app">
<button @click="getInfo">点击获取信息</button>
<span>{{ msg }}</span>
</div>
<script src="vue.js"></script>
<script src="vue-ajax.js"></script>
<script>
var vm=new Vue({
el: "#app",
data: {
msg: "",
},
methods: {
getInfo: function (){
var self=this;
this.ajax.get("1.json",{
tel: 123456,
address: "杭州"
},function (data){
self.msg=data[1].name
},"json");
}
}
})
</script>
</body>
</html>JS file:
/*
* ajax封装:
* 1. 引入文件
* 2. new Vue().ajax.get(url,data,fn,ojson), 或 new Vue().ajax.post(url,data,fn,ojson)
* url: 需要获取数据的文件地址 (string)
* data: 需要发送的信息 (可省略) (obj)
* fn: 获取信息后的回调函数,接收到的返回值为data (function)
* ojson: 是否需要转换为json格式 (可省略) (设置为 "json")
*
* 3. new Vue().ajax.get().cancel(): 取消异步请求
* 4. new Vue().ajax.json(str): 可转化json格式字符串
**/
Vue.prototype.ajax={
//添加url传送信息
addUrl: function (url,obj){
//如果省略url，则为post请求，令obj为url，令url为null
if(arguments.length==1){
obj=url;
url=null;
}
//url不为空(get请求: 设置url信息)
if(!!url){
for(var k in obj){
url += (url.indexOf("?")==-1 ? "?" : "&");
url+=encodeURIComponent(k)+ "=" +encodeURIComponent(obj[k]);
}
}else{
//post请求(设置data信息)
url="";
for(var k in obj){
url+=encodeURIComponent(k)+ "=" +encodeURIComponent(obj[k]);
url+="&";
}
//删除最后一个&
var arr=url.split("");
arr.pop();
url=arr.join("");
}
//返回拼接好的信息
return url;
},
get: function (url,data,fn,ojson){
this.xhr=new XMLHttpRequest();
//省略data时,即不发送数据
if(typeof data =="function"){
ojson=fn;
fn=data;
data={};
}
//合并url和data信息
url=this.addUrl(url,data)
//是否异步发送
this.xhr.open("get",url,true);
this.xhr.send(null);
//当请求完成之后调用回调函数返回数据
this.success(fn,ojson);
//链式编程
return this;
},
post: function (url,data,fn,ojson){
this.xhr=new XMLHttpRequest();
//省略data时,即不发送数据
if(typeof data =="function"){
ojson=fn;
fn=data;
data={};
}
//合并data信息
data=this.addUrl(data);
//是否异步发送
this.xhr.open("post",url,true);
this.xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
this.xhr.send(data);
//当请求完成之后调用回调函数返回数据
this.success(fn,ojson);
//链式编程
return this;
},
//字符串转换json
json: function (str){
return (new Function("return " + str))();
},
success: function (fn,ojson){
//当请求完成之后调用回调函数返回数据
var self=this;
this.xhr.onreadystatechange=function (){
var odata;
if(self.xhr.readyState == 4){
if((self.xhr.status>=200 && self.xhr.status<300) || self.xhr.status == 304){
odata=self.xhr.responseText;
//若为json则转化json格式
if(ojson==="json"){
odata=self.json(odata);
}
fn(odata);
}else{
odata="request was unsuccessful: "+self.xhr.status;
fn(odata);
}
}
}
},
//取消异步请求
cancel: function (){
this.xhr.abort();
return this;
}
}Backend acquisition or front-end constructed data structure:
[
{
"name": "张三",
"age": 18,
"sex": "man"
},
{
"name": "李四",
"age": 20,
"sex": "woman"
},
{
"name": "王五",
"age": 22,
"sex": "man"
}
]The above is the detailed content of Detailed explanation of code examples of Vue encapsulation ajax. For more information, please follow other related articles on the PHP Chinese website!
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