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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>IndexedDB — openCursor</title>
  <style>
    body {
      font-family: system-ui, sans-serif;
      margin: 0;
      padding: 1.5rem;
      background: #f8fafc;
      color: #334155;
      line-height: 1.6;
    }
    h1 { margin: 0 0 0.5rem; font-size: 1.25rem; color: #0f172a; }
    p { margin: 0 0 1rem; max-width: 440px; }
    .btns { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 1rem; }
    button {
      padding: 0.55rem 1rem;
      font-size: 0.9375rem;
      background: #2563eb;
      color: #fff;
      border: none;
      border-radius: 8px;
      cursor: pointer;
    }
    button.secondary { background: #7c3aed; }
    button:hover { filter: brightness(1.06); }
    button:disabled { opacity: 0.6; cursor: not-allowed; }
    #status {
      padding: 0.75rem 1rem;
      max-width: 440px;
      background: #fff;
      border: 1px solid #e2e8f0;
      border-radius: 8px;
      font-size: 0.875rem;
      margin-bottom: 0.75rem;
    }
    #status.ok { border-left: 4px solid #22c55e; }
    ul {
      margin: 0;
      padding-left: 1.25rem;
      max-width: 440px;
      font-size: 0.875rem;
    }
    li { margin-bottom: 0.35rem; }
    code { background: #e2e8f0; padding: 0.1rem 0.35rem; border-radius: 4px; }
  </style>
</head>
<body>
  <h1>Cursor over all rows</h1>
  <p>Use <code>openCursor()</code> to walk every record in the store.</p>

  <div class="btns">
    <button type="button" id="seedBtn" disabled>Add 3 items</button>
    <button type="button" id="cursorBtn" class="secondary" disabled>List with cursor</button>
  </div>

  <p id="status">Opening database&hellip;</p>
  <ul id="list"></ul>

  <script>
    var statusEl = document.getElementById('status');
    var listEl = document.getElementById('list');
    var db;

    var openReq = indexedDB.open('tryitCursorDemo', 1);

    openReq.onupgradeneeded = function (event) {
      event.target.result.createObjectStore('items', { keyPath: 'id', autoIncrement: true });
    };

    openReq.onsuccess = function (event) {
      db = event.target.result;
      statusEl.textContent = 'Ready. Add items, then list them with a cursor.';
      statusEl.className = 'ok';
      document.getElementById('seedBtn').disabled = false;
      document.getElementById('cursorBtn').disabled = false;
    };

    document.getElementById('seedBtn').addEventListener('click', function () {
      var tx = db.transaction(['items'], 'readwrite');
      var store = tx.objectStore('items');
      ['Apple', 'Banana', 'Cherry'].forEach(function (name) {
        store.add({ name: name });
      });
      tx.oncomplete = function () {
        statusEl.textContent = 'Added 3 items.';
        statusEl.className = 'ok';
      };
    });

    document.getElementById('cursorBtn').addEventListener('click', function () {
      listEl.innerHTML = '';
      var lines = [];

      var tx = db.transaction(['items'], 'readonly');
      var req = tx.objectStore('items').openCursor();

      req.onsuccess = function (event) {
        var cursor = event.target.result;
        if (cursor) {
          lines.push('Key ' + cursor.key + ': ' + cursor.value.name);
          cursor.continue();
        } else {
          if (!lines.length) {
            listEl.innerHTML = '<li><em>No records — add items first.</em></li>';
          } else {
            lines.forEach(function (line) {
              var li = document.createElement('li');
              li.textContent = line;
              listEl.appendChild(li);
            });
          }
          statusEl.textContent = 'Cursor finished. Found ' + lines.length + ' record(s).';
          statusEl.className = 'ok';
        }
      };
    });
  </script>
</body>
</html>
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IndexedDB Retrieve — openCursor() All Records
