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Ajax_POST submission
* $_post(): jquery handles post requests in ajax
* Basic syntax: $.post(url, data, success, dataType)
* Parameter description:
* url: requested address
* data: data that needs to be sent to the server
* success(data, status, xhr): execution Successful callback function,
* Callback parameters: 1.data: Data returned from the server
* 2.status: Status of the current request
* 3.xhr : ajax object
* Usually we only care about the returned data: data
* dataType: format of data returned from the server
* xml, html, script, json, text , _default
* Usually 'json', which can be omitted and automatically determined by the system
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>4.Ajax_POST</title> </head> <body> <form action="api/check.php" method="post"> <fieldset> <legend>用户登录</legend> <p> <label for="email">邮箱:</label> <input type="email" name="email" id="email"> </p> <p> <label for="password">邮箱:</label> <input type="password" name="password" id="password"> </p> <p> <button>登录</button> <span id="tips" style="font-size:1.2em;font-weight: bolder;color:red"></span> </p> </fieldset> </form> </body> </html> <script type="text/javascript" src="js/jquery.js"></script> <script type="text/javascript"> $('button:first').click (function(){ //1.ajax-post提交的地址 var url = 'api/user.php?m=login' //2.要提交到服务器的数据 var data = { "email": $('#email').val(), "password": $('#password').val() } //3.设置执行成功的回调函数 var success = function(res){ if (res == '1') { $('#tips').text('登录成功,正在跳转中...') setTimeout(function(){ location.href = 'api/index.php' },2000) } else { $('#tips').text('邮箱或密码错误,请重新输入...') $('#email').focus() setTimeout("$('#tips').empty()",2000) } } //4.设置返回的数据格式为:json var dataType = 'json' //5.调用全局函数$.post()执行post请求 $.post(url, data, success, dataType) /**简化代码,将参数值直接写到参数中 $.post( 'api/user.php?m=login', { "email": $('#email').val(), "password": $('#password').val() }, function(data){ if (data == '1') { $('#tips').text('登录成功,正在跳转中...') setTimeout(function(){ location.href = 'api/index.php' },2000) } else { $('#tips').text('邮箱或密码错误,请重新输入...') $('#email').focus() setTimeout("$('#tips').empty()",2000) } }, 'json') */ //禁用默认提交 return false }) </script>
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