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<html><head><script src="https://ajax.googleapis.com/ajax/libs/jquery/3.7.1/jquery.min.js"></script><script>$(document).ready(function(){ $("ul.test li").css("border", "4px double");});</script></head><body> <ul class="test"> <li>List item</li> <li>List item <ul> <li>Nested list item</li> </ul> </li> <li>List item</li></ul></body></html>