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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>exec() details</title>
</head>
<body>
  <h1>Result details</h1>
  <pre id="out"></pre>
  <script>
    var regex = /(JS)(\d+)/;
    var text = "Learn JS2026 today";
    var result = regex.exec(text);
    document.getElementById("out").textContent =
      "full: " + result[0] + "\n" +
      "g1: " + result[1] + "\n" +
      "g2: " + result[2] + "\n" +
      "index: " + result.index + "\n" +
      "input: " + result.input;
  </script>
</body>
</html>

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JavaScript RegExp exec() — result details (Try It)