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jQuery simple Ajax call example

巴扎黑Original: 2017-06-30 14:18:591112browse

jQuery It’s really convenient. Let’s make a simple Ajax call:

Create a simple html file:

<!DOCTYPE HTML><html><head><script type="text/javascript" src="Public/js/jquery-easyui-1.3.1/jquery-1.8.2.min.js"></script><script type="text/javascript">
    $(function(){        //按钮单击时执行        $("#testAjax").click(function(){              //取Ajax返回结果
              //为了简单，这里简单地从文件中读取内容作为返回数据              htmlobj=$.ajax({url:"/Readme.txt",async:false});               //显示Ajax返回结果               $("#myp").html(htmlobj.responseText);
         });
    });</script>    </head>
    <body>
        <p id="myp"><h2>通过 AJAX 改变文本</h2></p>
        <button id="testAjax" type="button">Ajax改变内容</button>
    </body></html>

Okay, click the button to see the effect.

Of course, jQuery's Ajax call can control many items, and a simple call is demonstrated here.

Pay attention to your own jqueryreferencepath.

Okay, let’s do an example of calling the background:

<!DOCTYPE HTML><html><head><script type="text/javascript" src="Public/js/jquery-easyui-1.3.1/jquery-1.8.2.min.js"></script><script type="text/javascript">
    $(function(){        //按钮单击时执行        $("#testAjax").click(function(){              
              //Ajax调用处理
            var html = $.ajax({
               type: "POST",
               url: "test.php",
               data: "name=garfield&age=18",
               async: false

            }).responseText;
            $("#myp").html('<h2>'+html+'</h2>');
         });
    });</script>    </head>
    <body>
        <p id="myp"><h2>通过 AJAX 改变文本</h2></p>
        <button id="testAjax" type="button">Ajax改变内容</button>
    </body></html>

Backend code:

<?php    $msg='Hello,'.$_POST['name'].',your age is '.$_POST['age'].'!';    echo $msg;

Now you can get data from the background!

Of course, we can also call Ajax like this:

<!DOCTYPE HTML><html><head><script type="text/javascript" src="Public/js/jquery-easyui-1.3.1/jquery-1.8.2.min.js"></script><script type="text/javascript">
    $(function(){        //按钮单击时执行        $("#testAjax").click(function(){              
              //Ajax调用处理            $.ajax({
               type: "POST",
               url: "test.php",
               data: "name=garfield&age=18",
               success: function(data){
                        $("#myp").html('<h2>'+data+'</h2>');
                  }
            });
            
         });
    });</script>    </head>
    <body>
        <p id="myp"><h2>通过 AJAX 改变文本</h2></p>
        <button id="testAjax" type="button">Ajax改变内容</button>
    </body></html>

Note that the data parameter in

success: function(data)

can be changed to another name, such as success: function( msg), msg(data) is the returned data. This is the parameter of the callback function, not the data parameter in the Ajax call in

data: "name=garfield&age=18"

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