Try It Yourself - Online HTML Editor

HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>Octal vs hex vs unicode</title>
</head>
<body>
  <h1>Three forms of A</h1>
  <pre id="out"></pre>
  <script>
    var ch = "A";
    document.getElementById("out").textContent =
      /\101/.test(ch) + "\n" +
      /\x41/.test(ch) + "\n" +
      /\u0041/.test(ch);
  </script>
</body>
</html>

Lines: 0 | Characters: 0

Live Preview Auto-refresh on Run

JavaScript RegExp \ooo — compare \101 \x41 \u0041 (Try It)