HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>sessionStorage — set and get</title>
</head>
<body>
  <h1>Save and read a value</h1>
  <p>Type a name, click Save, then Load.</p>
  <input type="text" id="input" placeholder="Enter your name">
  <button type="button" id="saveBtn">Save</button>
  <button type="button" id="loadBtn">Load</button>
  <p id="result">(nothing loaded yet)</p>

  <script>
    document.getElementById('saveBtn').onclick = function () {
      var name = document.getElementById('input').value;
      sessionStorage.setItem('username', name);
      document.getElementById('result').textContent = 'Saved: ' + name;
    };

    document.getElementById('loadBtn').onclick = function () {
      var name = sessionStorage.getItem('username');
      document.getElementById('result').textContent =
        name ? 'Hello, ' + name : 'No name saved in this tab';
    };
  </script>
</body>
</html>

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Session Storage — setItem & getItem