AJAX jQuery实现异步通信
程序员文章站
2022-03-06 12:49:26
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Load方法：用于从服务器加载数据并将内容填充
<!--开发要认真 三思而后行 -->
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1">
<title></title>
</head>
<body>
<button type="button" "load()">Load方法</button>
<div id="info">
</div>
<script src="js/jquery-1.12.4.js" type="text/javascript" charset="utf-8"></script>
<script type="text/javascript">
function load()
{
//从服务器获取数据
//第一个参数为服务器URL
// 第二个参数不写则为get写为post
// 第三个参数为回调 可以获取 返回信息 状态码 xmlHTTPRequest对象
$("#info").load("data/content.txt",{},function(data,status,xhr){
console.log("++",data,status,xhr);
})
}
</script>
</body>
</html>
GET方法：
<!--开发要认真 三思而后行 -->
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1">
<title></title>
</head>
<body>
<button type="button" "post()">POST请求</button>
<div id="info">
</div>
<script src="js/jquery-1.12.4.js" type="text/javascript" charset="utf-8"></script>
<script type="text/javascript">
function post(){
//第一个参数为URL
//第二个参数为 POST数据
//第三个参数为 回调方法
$.post("http://localhost:3000",{name:"zzy",age:20},function(resTxt,status,xhr){
document.getElementById("info").innerText=resTxt;
console.log(status,xhr);
})
}
</script>
</body>
</html>
AjAx方法Get
<!--开发要认真 三思而后行 -->
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1">
<title></title>
</head>
<body>
<button type="button" "ajax()">Ajax请求</button>
<div id="info">
</div>
<script src="js/jquery-1.12.4.js" type="text/javascript" charset="utf-8"></script>
<script type="text/javascript">
function ajax(){
$.ajax({
url:"data/content.txt?name=zzy",
type:"GET",
success:function(data,status,xhr){
document.getElementById("info").innerText=data;
console.log(status,xhr);
}
});
}
</script>
</body>
</html>
AjAx方法Post
<!--开发要认真 三思而后行 -->
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1">
<title></title>
</head>
<body>
<button type="button" "ajax()">Ajax请求</button>
<div id="info">
</div>
<script src="js/jquery-1.12.4.js" type="text/javascript" charset="utf-8"></script>
<script type="text/javascript">
function ajax(){
$.ajax({
url:"http://localhost:3000?name=zzy",
type:"post",
data:{na:"zz",age:"20"},
success:function(data,status,xhr)
{
document.getElementById("info").innerText=data;
console.log(status,xhr);
},
});
}
</script>
</body>
</html>
智能词条：
<!--开发要认真 三思而后行 -->
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1">
<title></title>
<style type="text/css">
*{
margin: 0;
padding: 0;
}
#container{
margin: 100px auto;
width: 400px;
background-color: #808080;
}
#kw{
width: 400px;
background-color: #CECECE;
}
ul{
/* display: none; */
}
ul li{
list-style: none;
background-color:#FFC0CB;
margin-bottom: 1px;
}
</style>
</head>
<body>
<div id="container">
<input type="text" name="kw" id="kw" value="" />
<ul id="msg">
</ul>
</div>
<script src="js/jquery-1.12.4.js" type="text/javascript" charset="utf-8"></script>
<script type="text/javascript">
var kw = $("#kw");
kw.keyup(function(){
$.ajax({
url:"https://sp0.baidu.com/5a1Fazu8AA54nxGko9WTAnF6hhy/su?cb=?",
type:"get",
data:{wd:kw.val()},
dataType:"jsonp",
success:function(msg){
$("ul").empty();
var msgs=msg.s;
for(var i=0;i<msgs.length;i++){
var str="<li>"+ msgs[i] +"</li>";
$("ul").append(str)
}
}
})
});
</script>
</body>
</html>
<!--同源策略
Web规范只能在相同域名下获取数据
如果不同域名下需要跨域
-->