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<!DOCTYPE html>

<html lang="en">

<head>

  <meta charset="utf-8">

  <title>toString() basic</title>

</head>

<body>

  <h1>Basic toString()</h1>

  <pre id="out"></pre>

  <script>

    var regex = /hello/gi;

    document.getElementById("out").textContent =

      regex.toString() + "\n" + typeof regex.toString();

  </script>

</body>

</html>

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JavaScript RegExp toString() — basic output (Try It)