HTML Code

<!DOCTYPE html>

<html lang="en">

<head>

  <meta charset="utf-8">

  <title>$ with m</title>

</head>

<body>

  <h1>Line endings</h1>

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

  <script>

    var text = "line one end\nline two end\nno match";

    document.getElementById("out").textContent =

      /end$/.test(text) + "\n" +

      /end$/m.test(text) + "\n" +

      text.match(/end$/gm).join(" | ");

  </script>

</body>

</html>

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JavaScript RegExp $ quantifier — multiline line end (Try It)