HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Local Storage Example</title>
</head>
<body>
  <h1>HTML Local Storage Example</h1>
  <button type="button" id="save">Save to Local Storage</button>
  <button type="button" id="retrieve">Retrieve from Local Storage</button>
  <button type="button" id="remove">Remove from Local Storage</button>
  <button type="button" id="clear">Clear All Local Storage</button>
  <p id="output"></p>

  <script>
    document.getElementById('save').onclick = function () {
      localStorage.setItem('greeting', 'Hello, World!');
      document.getElementById('output').textContent = 'Data saved!';
    };

    document.getElementById('retrieve').onclick = function () {
      var greeting = localStorage.getItem('greeting');
      document.getElementById('output').textContent =
        greeting ? greeting : 'No data found';
    };

    document.getElementById('remove').onclick = function () {
      localStorage.removeItem('greeting');
      document.getElementById('output').textContent = 'Data removed!';
    };

    document.getElementById('clear').onclick = function () {
      localStorage.clear();
      document.getElementById('output').textContent = 'All data cleared!';
    };
  </script>
</body>
</html>

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Local Storage — Complete Example Page