JQuery 第二天 - 层次选择器

最新推荐文章于 2022-05-13 08:40:14 发布

最新推荐文章于 2022-05-13 08:40:14 发布 · 127 阅读

文章标签：

#jQuery #CSS #HTML #ViewUI

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本文介绍如何使用jQuery操作HTML元素，包括选择元素、改变样式、选择特定类型的元素、选择相邻元素和兄弟元素的方法。


<%@ page language="java" import="java.util.*" pageEncoding="UTF-8" %>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %>
 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
    <head>
        <base href="<%=basePath%>"><title>JQuery DEMO</title>
        <meta http-equiv="pragma" content="no-cache">
        <meta http-equiv="cache-control" content="no-cache">
        <meta http-equiv="expires" content="0">
        <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
        <meta http-equiv="description" content="This is my page">
        <!--
        <link rel="stylesheet" type="text/css" href="styles.css">
        -->
        <style type="text/css">
        	div{
        		width:250px;
				height:100px;
				border:1px solid blue;
				float:left;
				padding:10px;
        	}
			span{
				margin:3px;
				border:1px solid red;
				padding:5px;
			}
			h1,h2{
				display:inline;
			}
        </style>
		<!--引入 jquery.js 文件-->
        <script type="text/javascript" src="js/jquery/jquery-1.3.2.js">
        </script>
        <script type="text/javascript">
         		$(function(){
					//选取div中所有的span元素样式
					$("div span").css("background","yellow");

					//选取div下元素是span元素样式
					$("div>span").css("background","blue");

					//选取id为sp1的下一个span元素
					//	$("#sp1 + span").css("border","3px solid black");
					//等价于
					$("#sp1").next("span").css("border","3px solid black");

					//选取id为div1的所有兄弟span元素
					$("#div1 ~ span").css("background","#eeeeee");
					//等价于
					//	$("#div1").nextAll("span").css("background","#eeeeee");

					//不同于 siblings 与前后位置无关
					$("#div1").siblings("span").css("background","#113344");
				});
        </script>
    </head>
    <body>
    		<span>
			SPAN2
		</span>
		<div id="div1">
			<h1>div h1</h1>			
		</div>
		<div>
			<h2 >div h2</h2>
		</div>
		<div>
			<span>div span</span>
		</div>
		<div>
			<span>
				<span  id="sp1">div.div.span1</span>				
				<span>div.div.span2</span>				
			</span>
		</div>
		<span>
			SPAN1
		</span>
    </body>
</html>