Try it Yourself - Bootstrap ref_js_popover

<!DOCTYPE html>
<html lang="en">
<head>
  <title>Bootstrap Example</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="stylesheet" href="/lib/bootstrap.min.css">
  <script src="/lib/jquery-1.12.2.min.js"></script>
  <script src="/lib/bootstrap.min.js"></script>
</head>
<body>

<div class="container">
  <h3>Popover Options</h3>
  <p>The <strong>placement</strong> option specifies the popover position.</p>
  <div>
    <button class="btn btn-warning btn-md">Top</button>
    <button class="btn btn-success btn-md">Bottom</button>
    <button class="btn btn-danger btn-md">Left</button>
    <button class="btn btn-default btn-md">Right</button>
  </div>
</div>

</body>
</html>