HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>blur() — element contrast</title>
</head>
<body>
  <input id="name" type="text" value="Focus is here">
  <button type="button" id="blurInput">Blur input</button>
  <pre id="out"></pre>
  <script>
    document.getElementById("blurInput").onclick = function () {
      document.getElementById("name").blur();
      document.getElementById("out").textContent = "Input blurred — window may still be focused";
    };
  </script>
</body>
</html>

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JavaScript Window blur() — vs element blur (Try It)