HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>last-child vs last</title>
  <style>
    body { font-family: sans-serif; padding: 16px; }
    li { margin: 4px 0; padding: 4px 8px; border: 1px solid #ccc; }
    .lc { background: #bbf; }
    .one { outline: 3px solid #dc2626; }
    #output { margin-top: 12px; padding: 12px; background: #e0f2fe; border: 1px solid #0284c7; }
  </style>
</head>
<body>
  <ul><li>A1</li><li>A2</li></ul>
  <ul><li>B1</li><li>B2</li></ul>
  <div id="output"></div>
  <script src="https://code.jquery.com/jquery-3.7.1.min.js"></script>
  <script>
    $("li:last-child").addClass("lc");
    $("li").last().addClass("one");
    $("#output").html(
      ":last-child → " + $("li:last-child").length + " (one per list)<br>" +
      ".last() → " + $("li").last().length + " (single element)"
    );
  </script>
</body>
</html>

Lines: 0 | Characters: 0

Live Preview Auto-refresh on Run

:last-child vs .last() (Try It)