xxxxxxxxxx<html lang="en"><head><meta charset="utf-8"><title>jQuery Add LI to an Existing UL</title><script src="https://code.jquery.com/jquery-3.5.1.min.js"></script><script>$(document).ready(function(){ $("button").click(function(){ $("#menu").append('<li><a href="#">New list item</a></li>'); });});</script></head><body> <ul id="menu"> <li><a href="#">Home</a></li> <li><a href="#">About</a></li> <li><a href="#">Services</a></li> </ul> <button type="button">Add New LI Element</button></body></html>