<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<script src="./js/jquery.min.js"></script>
</head>
<body>
<a href="#" title="">你好</a>
<input type="checkbox" checked>
<div index="1" data-index="2"></div>
<span>123</span>
<script>
$(function() {
//获取元素固定的属性值
console.log($("a").prop("href"));
$("a").prop("title", "我们都挺好");
$("input").change(function() {
console.log($(this).prop("checked"));
})
//元素自定义属性通过attr来获取
console.log($("div").attr("index"));
$("div").attr("index", 4);
//数据缓存
$("span").data("uname", "andy");
console.log($("span").data("uname"));
//第一个不用写data开头
console.log($("div").data("index"));
})
</script>
</body>
</html> 运行结果
![jQuery实现百度搜索框[图]](data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACwAAAAAAQABAAACAkQBADs=)