HTML Code

<!DOCTYPE html>

<html lang="en">

<head>

  <meta charset="utf-8">

  <title>$ suffix</title>

</head>

<body>

  <h1>End anchor suffix</h1>

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

  <script>

    var phrases = ["hello world", "world peace", "say world"];

    var lines = phrases.map(function (s) {

      return s + " → " + /world$/.test(s);

    });

    document.getElementById("out").textContent = lines.join("\n");

  </script>

</body>

</html>

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JavaScript RegExp $ quantifier — suffix match (Try It)