HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>Split on \f</title>
</head>
<body>
  <h1>split() on form feed</h1>
  <pre id="out"></pre>
  <script>
    var doc = "Title\fChapter 1\fChapter 2\fIndex";
    var sections = doc.split(/\f/);
    document.getElementById("out").textContent =
      JSON.stringify(sections) + "\n" + sections.length;
  </script>
</body>
</html>

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JavaScript RegExp \f — split sections (Try It)