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jquery children()和find()区别

2024-03-31 Web开发

<html> <head> <meta charset="UTF-8"> <title>Document</title> <style> div{ /*background-color: pink;*/ } </style> </head> <body> <div> <span>11</span> <span> <ul> <li class="no1">aaa</li> <li>bbb</li> <li>ccc</li> </ul> </span> <span>222</span> <ul> <li>ddd</li> <li>eee</li> <li>fff</li> </ul> </div> </body> <script src="http://code.jquery.com/jquery-latest.js"></script> <script> $("div").children(".no1").css({color:‘#a61c00‘,backgroundColor:"#0000ff"}); console.log($("div").children(".no1")[0]); // 打印获取到的dom元素这时你会发现结果为 undefined // $("div").find(".no1").css({color:‘#a61c00‘,backgroundColor:"#0000ff"}); </script> </html>

技术图片

此时我们再把find 这项打开注释

<html> <head> <meta charset="UTF-8"> <title>Document</title> <style> div{ /*background-color: pink;*/ } </style> </head> <body> <div> <span>11</span> <span> <ul> <li class="no1">aaa</li> <li>bbb</li> <li>ccc</li> </ul> </span> <span>222</span> <ul> <li>ddd</li> <li>eee</li> <li>fff</li> </ul> </div> </body> <script src="http://code.jquery.com/jquery-latest.js"></script> <script> // $("div").children(".no1").css({color:‘#a61c00‘,backgroundColor:"#0000ff"}); // console.log($("div").children(".no1")[0]); $("div").find(".no1").css({color:‘#a61c00‘,backgroundColor:"#0000ff"}); console.log($("div").find(".no1")[0]); </script> </html>