Tryit Editor v2.9

Edit This Code:
<!DOCTYPE html>
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.2/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 (will not have border)</li>
  </ul>
  </li>
  <li>List item</li>
</ul>

</body>
</html>