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Ajax_POST submission

无忌哥哥Original: 2018-06-29 14:57:251887browse

* $_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">
$(&#39;button:first&#39;).click (function(){
//1.ajax-post提交的地址
var url = &#39;api/user.php?m=login&#39;
//2.要提交到服务器的数据
var data = {
"email": $(&#39;#email&#39;).val(),
"password": $(&#39;#password&#39;).val()
}
//3.设置执行成功的回调函数
var success = function(res){
if (res == &#39;1&#39;) {
$(&#39;#tips&#39;).text(&#39;登录成功,正在跳转中...&#39;)
setTimeout(function(){
location.href = &#39;api/index.php&#39;
},2000)
} else {
$(&#39;#tips&#39;).text(&#39;邮箱或密码错误,请重新输入...&#39;)
$(&#39;#email&#39;).focus()
setTimeout("$(&#39;#tips&#39;).empty()",2000)
}
}
//4.设置返回的数据格式为:json
var dataType = &#39;json&#39;
//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(
&#39;api/user.php?m=login&#39;,
{
"email": $(&#39;#email&#39;).val(),
"password": $(&#39;#password&#39;).val()
}, 
function(data){
if (data == &#39;1&#39;) {
$(&#39;#tips&#39;).text(&#39;登录成功,正在跳转中...&#39;)
setTimeout(function(){
location.href = &#39;api/index.php&#39;
},2000)
} else {
$(&#39;#tips&#39;).text(&#39;邮箱或密码错误,请重新输入...&#39;)
$(&#39;#email&#39;).focus()
setTimeout("$(&#39;#tips&#39;).empty()",2000)
}
}, &#39;json&#39;)
*/
//禁用默认提交
return false
})
</script>

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