jquery基础选择器的用法

时间：2024-11-16 09:12:36

1、选择所有元素：<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%><%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %><% pageContext.setAttribute("APP_PATH",request.getContextPath());%><meta name="viewport" content="width=device-width,initial-scale=1"><script type="text/javascript" src="${APP_PATH}/static/js/jquery-3.2.1.min.js"></script><link rel="stylesheet" href="${APP_PATH}/static/bootstrap-3.3.7-dist/css/bootstrap.min.css" /><script type="text/javascript" src="${APP_PATH}/static/bootstrap-3.3.7-dist/js/bootstrap.min.js"></script><script type="text/javascript"> $(function() { $("div *").html("我是大神"); })</script><html> <body> <div> <p></p> <label></label> </div> </body></html>

2、运行程序，查看程序的执行结果，div下的单个表单都加上了我们脚本中的内容。

3、类选择器，选择给定类名"pcontent"的所有元素。<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%><%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %><% pageContext.setAttribute("APP_PATH",request.getContextPath());%><meta name="viewport" content="width=device-width,initial-scale=1"><script type="text/javascript" src="${APP_PATH}/static/js/jquery-3.2.1.min.js"></script><link rel="stylesheet" href="${APP_PATH}/static/bootstrap-3.3.7-dist/css/bootstrap.min.css" /><script type="text/javascript" src="${APP_PATH}/static/bootstrap-3.3.7-dist/js/bootstrap.min.js"></script><script type="text/javascript"> $(function() { $(".pcontent").html("我是大神"); })</script><html> <body> <div> <p class="pcontent"></p> <label></label> </div> </body></html>

4、元素选择器：根据给定标记名称选择所有的元素：<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%><%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %><% pageContext.setAttribute("APP_PATH",request.getContextPath());%><meta name="viewport" content="width=device-width,initial-scale=1"><script type="text/javascript" src="${APP_PATH}/static/js/jquery-3.2.1.min.js"></script><link rel="stylesheet" href="${APP_PATH}/static/bootstrap-3.3.7-dist/css/bootstrap.min.css" /><script type="text/javascript" src="${APP_PATH}/static/bootstrap-3.3.7-dist/js/bootstrap.min.js"></script><script type="text/javascript"> $(function() { $("span").html("我是大神666"); })</script><html> <body> <div> <p></p> <label></label> <span></span> </div> </body></html>

5、id选择器：选择一个具有给定id属性的单个元素：<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%><%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %><% pageContext.setAttribute("APP_PATH",request.getContextPath());%><meta name="viewport" content="width=device-width,initial-scale=1"><script type="text/javascript" src="${APP_PATH}/static/js/jquery-3.2.1.min.js"></script><link rel="stylesheet" href="${APP_PATH}/static/bootstrap-3.3.7-dist/css/bootstrap.min.css" /><script type="text/javascript" src="${APP_PATH}/static/bootstrap-3.3.7-dist/js/bootstrap.min.js"></script><script type="text/javascript"> $(function() { $("#content").html("我是大神666"); })</script><html> <body> <div> <p></p> <label></label> <span id="content"></span> </div> </body></html>

6、多个元素选择器，将每一个选择器匹配到的元素合并后一起返回。<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%><%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %><% pageContext.setAttribute("APP_PATH",request.getContextPath());%><meta name="viewport" content="width=device-width,initial-scale=1"><script type="text/javascript" src="${APP_PATH}/static/js/jquery-3.2.1.min.js"></script><link rel="stylesheet" href="${APP_PATH}/static/bootstrap-3.3.7-dist/css/bootstrap.min.css" /><script type="text/javascript" src="${APP_PATH}/static/bootstrap-3.3.7-dist/js/bootstrap.min.js"></script><script type="text/javascript"> $(function() { $("#content,p,label").html("我是大神6676"); })</script><html> <body> <div> <p></p> <label></label> <span id="content"></span> </div> </body></html>