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Use jQuery's AJax to implement asynchronous access and asynchronous loading

高洛峰

Dec 08, 2016 am 11:15 AM

jquery

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($_GET[&#39;name&#39;])){
  echo "姓名：".$_GET[&#39;name&#39;];
}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:

Use jQuerys AJax to implement asynchronous access and asynchronous loading

【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 id="中超-耿晓峰失误拉蒙两球-nbsp-申花-轮首败-绿城">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:

Use jQuerys AJax to implement asynchronous access and asynchronous loading

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