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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>Replace \f</title>
</head>
<body>
  <h1>Normalize form feeds</h1>
  <pre id="out"></pre>
  <script>
    var legacy = "Page A\fPage B\fPage C";
    var readable = legacy.replace(/\f/g, "\n\n");
    document.getElementById("out").textContent = JSON.stringify(readable);
  </script>
</body>
</html>

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JavaScript RegExp \f — replace with newlines (Try It)