跨域代码示例——模拟百度搜索
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
*{
margin: 0;
padding: 0;
}
ul{
list-style: none;
}
input{
border: 0;
outline: none;
}
.box{
width: 500px;
height: 150px;
margin: 20px auto;
}
.box .search-box{
float: left;
width: 400px;
box-sizing: border-box;
border:2px solid cornflowerblue;
}
.box .search-box .txt{
display: block;
height: 46px;
line-height: 46px;
color: #333;
padding-left: 10px;
font-size: 16px;
}
.box .search-box ul li{
padding-left: 10px;
line-height: 36px;
color: #333;
}
.box .btn{
float: left;
width: 100px;
height: 50px;
background-color: cornflowerblue;
font-size: 18px;
color: #fff;
font-weight: bold;
}
</style>
</head>
<body>
<div class="box">
<div class="search-box">
<input type="text" class="txt">
<ul class="suggest-list">
<!-- <li>1</li>
<li>2</li>
<li>3</li>
<li>4</li> -->
</ul>
</div>
<input type="button" value="搜索" class="btn">
</div>
<script src="jquery-1.12.4.min.js"></script>
<script>
//添加txt按键弹起事件,每输入一个文字都会触发事件
var $txt = $(".txt");
var $ul = $(".suggest-list");
$txt.keydown(function(){
//获取input内输入的内容
var keyword = $(this).val();
//发送请求
$.ajax({
url:"https://www.baidu.com/sugrec?pre=1&p=3&ie=utf-8&json=1&prod=pc&from=pc_web",
// type:"get",
dataType: "jsonp",
jsonp: "cb",
data: { "wd": keyword },
success:function(data){
// console.log(data.g);
//获取需要的数据
var arr = data.g;
//将所有数组中的数据，渲染到页面中的ul里面
var str = "";
for(var i = 0;i < arr.length;i ++){
// 遍历数组，进行字符串拼接
// 字面量的方式 拼接字符串
str += `<li>${arr[i].q}</li>`;
}
//将最终拼接的字符串添加到页面上
$ul.html(str);
}
})
})
</script>
</body>
</html>
