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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>setTimeout() — basic</title>
</head>
<body>
  <pre id="out">Waiting…</pre>
  <script>
    function greet() {
      document.getElementById("out").textContent = "Hello, world!";
    }
    setTimeout(greet, 2000);
  </script>
</body>
</html>

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JavaScript setTimeout() — basic delay (Try It)