Use jQuery's AJax to implement asynchronous access and asynchronous loading
- 高洛峰Original
- 2016-12-08 11:15:381332browse
This article implements asynchronous access and asynchronous loading using jQuery's AJax. It has certain reference value. Interested friends can refer to it.
【Asynchronous Access】
Use an example to illustrate: click the button, send the data entered by the user in the input to the server, and return the result to the page.
The first is the html content:
<!DOCTYPE html> <html> <head lang="en"> <meta charset="UTF-8"> <title>AJax异步访问</title> <script src="js/jquery-2.1.3.min.js"></script> <script src="js/ajaxDemo.js"></script> </head> <body> <input type="text" id="nameValue"> <br/> <button id="btn">提交</button> <p> 结果：<span id="result"></span> </p> </body> </html>
Configuration server: Server.php
<?php
if(isset($_GET['name'])){
echo "姓名：".$_GET['name'];
}else{
echo "参数错误";
}
ajaxDemo.js implements AJax asynchronous access:
$(document).ready(function(){
$("#btn").on("click",function(){
//在与服务器通讯较慢时给用户提示信息
$("#result").text("数据请求中，请稍后...");
//向服务器发送请求(get、post)
$.get("Server.php",{name:$("#nameValue").val()},function(data){
$("#result").text(data);
}).error(function(){
//当服务器出现异常时
$("#result").text("服务器正在维护")
})
})
})
Achieve the effect:
【Asynchronous Loading】
Mainly use the load() method and getScript() method, specifically explained with an example:
Load a prepared fragment in the existing html file, and in the fragment A popup that prevents the user from further action until loading is complete.
The first is the existing html code without any content:
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>AJax异步加载</title> <script src="js/jquery-2.1.3.min.js"></script> <script src="js/main.js"></script> </head> <body> </body> </html>
Draw a js file getData.js and write a simple pop-up box prompt for the function as an example:
function getData(){
alert("片段的内容引自新浪体育");
}
拟一个片段box.htm，承载要加载的片段内容：
<div>
<h4>中超-耿晓峰失误拉蒙两球 申花7轮首败1-4绿城</h4>
<p>
北京时间8月11日晚19点35分，2015年中超联赛第22轮在杭州黄龙体育场开始一场较量，
由杭州绿城迎战上海申花。上半场第7分钟陈柏良突然冷射，导致耿晓峰接球脱手造成失球，
这是中华台北球员（陈昌源在比利时土生土长）在中超联赛进的首球。
第12分钟申花队吕征禁区右路左脚凌空射门扳平比分。第25分钟阿甘在底线附近把球送入禁区，
拉蒙头球得分，第37分钟阿甘单刀赴会打入一球。
第60分钟阿甘头球摆渡，拉蒙跟进射门梅开二度。最终杭州绿城4比1战胜上海申花。
</p>
</div>Finally write main.js to load getData asynchronously. js and box.htm into the existing html file.
$(document).ready(function(){
//异步加载js文件
$.getScript("js/getData.js").complete(function(){
getData();
})
//异步加载片段
$("body").text("加载中...")
$("body").load("box.htm",function(url,status,c){
if(status=="error"){
$(this).text("片段加载失败");
}
});
})Final effect:
