HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>jQuery href starts with https</title>
  <style>
    a { display: block; margin: 8px 0; }
    .secure-link { color: #16a34a; font-weight: bold; }
  </style>
</head>
<body>
  <a href="https://example.com">HTTPS example</a>
  <a href="https://docs.site/page">HTTPS docs</a>
  <a href="http://example.com">HTTP example</a>
  <a href="/about">Relative about</a>
  <script src="https://code.jquery.com/jquery-3.7.1.min.js"></script>
  <script>
    $("a[href^='https://']").addClass("secure-link");
  </script>
</body>
</html>

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jQuery a[href^='https://'] — secure links (Try It)