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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>URL normalization</title>
</head>
<body>
  <h1>Normalize protocols</h1>
  <pre id="out"></pre>
  <script>
    var links = [
      "http://example.com",
      "https://secure.com",
      "ftp://files.com"
    ];
    var normalized = links.map(function (link) {
      return link.replace(/^(http|https):\/\//, "https://");
    });
    document.getElementById("out").textContent = JSON.stringify(normalized);
  </script>
</body>
</html>

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