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<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>runoops自学教程(runoops.com)</title> <style> .ancestors *{ display: block; border: 2px solid lightgrey; color: lightgrey; padding: 5px; margin: 15px; } </style> <script src="https://cdn.staticfile.org/jquery/1.10.2/jquery.min.js"> </script> <script> $(document).ready(function(){ $("div").find(".1").css({"color":"red","border":"2px solid red"}); }); </script> </head> <body class="ancestors">body (曾祖先节点) <div style="width:500px;">div (祖先节点) <ul>ul (直接父节点) <li class="1">li (子节点) <span>span (孙节点)</span> </li> <li class="2">li (子节点) <span class="1">span (孙节点)</span> </li> </ul> </div> </body> </html>
运行结果：