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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 delete key range</title>
  <style>
    body { font-family: system-ui, sans-serif; margin: 1.5rem; line-height: 1.5; }
    button { margin-right: 0.5rem; margin-bottom: 0.5rem; padding: 0.5rem 0.9rem; cursor: pointer; }
    #status { margin-top: 1rem; }
  </style>
</head>
<body>
  <h1>Delete a key range</h1>
  <p>Seed ids 1–5, then delete keys 1 through 3 with <code>IDBKeyRange.bound(1, 3)</code>.</p>

  <button type="button" id="seedBtn" disabled>Seed ids 1–5</button>
  <button type="button" id="listBtn" disabled>List keys</button>
  <button type="button" id="rangeBtn" disabled>Delete range 1–3</button>

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

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

    function listKeys() {
      var tx = db.transaction(['orders'], 'readonly');
      var req = tx.objectStore('orders').getAllKeys();
      req.onsuccess = function () {
        var keys = req.result;
        statusEl.textContent = keys.length
          ? 'Keys in store: ' + keys.join(', ')
          : 'Store is empty.';
      };
    }

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

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

    openReq.onsuccess = function (event) {
      db = event.target.result;
      statusEl.textContent = 'Ready.';
      ['seedBtn', 'listBtn', 'rangeBtn'].forEach(function (id) {
        document.getElementById(id).disabled = false;
      });
    };

    document.getElementById('seedBtn').addEventListener('click', function () {
      var tx = db.transaction(['orders'], 'readwrite');
      var store = tx.objectStore('orders');
      for (var i = 1; i <= 5; i++) {
        store.put({ id: i, label: 'Order ' + i });
      }
      tx.oncomplete = function () {
        statusEl.textContent = 'Seeded orders 1–5.';
      };
    });

    document.getElementById('listBtn').addEventListener('click', listKeys);

    document.getElementById('rangeBtn').addEventListener('click', function () {
      var tx = db.transaction(['orders'], 'readwrite');
      var range = IDBKeyRange.bound(1, 3);
      var req = tx.objectStore('orders').delete(range);
      req.onsuccess = function () {
        statusEl.textContent = 'Deleted keys 1–3 with store.delete(range).';
      };
    });
  </script>
</body>
</html>
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IndexedDB Delete — Key Range
