HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>String.blink()</title>
</head>
<body>
  <pre id="out"></pre>
  <script>
    var html = "Hello, world".blink();
    document.getElementById("out").textContent =
      html + "\n(invalid modern markup — <blink> was removed; do not blink text)";
  </script>
</body>
</html>

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String.blink() — legacy HTML (Try It)