jquery$.ajax() method-JS Tutorial-php.cn

jquery$.ajax() method

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Release： 2018-06-29 15:14:25

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jquery's $.ajax() method

* $.ajax()

* Function: It is the Ajax underlying method in jquery, the $.get() I learned before, $.post...all its special forms

* Syntax: $ajax()

* Parameters: Parameters are written into js object literals

* Note: Because there are many parameters, examples are used to illustrate them below

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>$.ajax()</title>
</head>
<body>
<h2>用户登录</h2>
<form>
<p>用户名:<input type="text" name="name"></p>
</form>
</body>
</html>
<script type="text/javascript" src="js/jquery.js"></script>
<script type="text/javascript">
//当失去焦点时时行验证
$(&#39;:input&#39;).blur(function(){
// alert(&#39;通过&#39;)
//使用ajax进行异步验证
//语法1: 全部参数写到$.ajax()参数中
$.ajax({
//请求的服务器资源,必须是字符串
url: &#39;api/demo.php&#39;,
//客户端的请求类型:GET,POST...,推荐大写
type: &#39;GET&#39;,
//从服务器端返回的数据类型格式:xml,html,json,txt等
// dataType: &#39;json&#39;,
//异步true,还是同步false(锁定浏览器)
// async: true,
//发送数据
//1.查询字符串键值对,多个值之间用&连接
// data: &#39;name=&#39;+$(&#39;:input&#39;).val(),
//2.json格式
// data: {&#39;name&#39;:$(&#39;:input&#39;).val()},
//3.当表单有多个字段时使用序列化方法可提高效率
//将表单控件内容序列化为查询键值对格式
// data: $(&#39;form:first&#39;).serialize(),
//4.将表单控件内容序列化为json格式
data: $(&#39;form:first&#39;).serializeArray(),
//成功回调
success: function(msg,status,xhr) {
console.log(msg)
$(&#39;p span&#39;).empty()
$(&#39;p&#39;).append($(msg))
}
})
//$.ajax()第二种语法格式,用得不多,但要看得懂
$.ajax({
url: &#39;api/demo1.php&#39;,
type: &#39;GET&#39;,
dataType: &#39;json&#39;,
data: $(&#39;form:first&#39;).serialize(),
})
.done(
function(msg) {
console.log(msg.tips)
$(&#39;p span&#39;).empty()
$(&#39;p&#39;).append($(msg.tips))
})
})
</script>

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