<html><head><script src="https://libs.baidu.com/jquery/2.1.4/jquery.min.js"></script><script>$(document).ready(function(){ $("button").click(function(){ $("p").wrap(function(){ return "<div></div>" }); });});</script><style>div { background-color: yellow; padding: 10px;}</style></head><body><p>This is a paragraph.</p><button>Wrap a div element around the p element</button></body></html>