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<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>迹忆客(jiyik.com)</title> <script src="https://www.jiyik.com//templets/jiyi/v2/js/jquery-2.2.4.min.js"> </script> <script> $(document).ready(function(){ $("button").click(function(){ $("h1,h2,p").removeClass("blue"); }); }); </script> <style type="text/css"> .important { font-weight:bold; font-size:xx-large; } .blue { color:blue; } </style> </head> <body> <h1 class="blue">标题 1</h1> <h2 class="blue">标题 2</h2> <p class="blue">这是一个段落。</p> <p class="important">这是另外一个段落。</p> <br> <button>从元素中移除 class</button> </body> </html>
