<html><head><script src="/jquery/jquery-1.11.1.min.js"></script><script>$(document).ready(function(){ $("button").click(function(){ $("p").remove(".italic"); });});</script></head><body><p>This is a paragraph in the div.</p><p class="italic"><i>This is another paragraph in the div.</i></p><p class="italic"><i>This is another paragraph in the div.</i></p><button>删除 class="italic" 的所有 p 元素</button></body></html>