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  <title>Web SQL — batch INSERT</title>
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    .btns { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 1rem; }
    button {
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  <h1>Insert multiple rows in one transaction</h1>
  <p>Loop over a <code>products</code> array and run <code>tx.executeSql(...)</code> once per row&mdash;all inside a single <code>db.transaction()</code>.</p>

  <div class="btns">
    <button type="button" id="batchBtn">1. Insert 3 Products (batch)</button>
    <button type="button" id="listBtn" class="secondary">2. List Items</button>
  </div>

  <table id="itemTable">
    <thead>
      <tr><th>id</th><th>name</th></tr>
    </thead>
    <tbody id="itemBody">
      <tr><td colspan="2">Click "Insert 3 Products", then "List Items".</td></tr>
    </tbody>
  </table>

  <p id="status">Follow the steps in order.</p>

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

    if (!window.openDatabase) {
      statusEl.textContent = 'Web SQL is not supported in this browser.';
      statusEl.className = 'err';
    } else {
      var db = openDatabase('tryitDemo', '1.0', 'Try It DB', 1024 * 1024);

      db.transaction(function (tx) {
        tx.executeSql(
          'CREATE TABLE IF NOT EXISTS items (id INTEGER PRIMARY KEY, name TEXT)'
        );
      });

      function renderRows(rows) {
        if (!rows.length) {
          bodyEl.innerHTML = '<tr><td colspan="2">No items — insert the batch first.</td></tr>';
          return;
        }
        bodyEl.innerHTML = rows.map(function (r) {
          return '<tr><td>' + r.id + '</td><td>' + r.name + '</td></tr>';
        }).join('');
      }

      document.getElementById('batchBtn').addEventListener('click', function () {
        var products = [
          { id: 10, name: 'Apple' },
          { id: 11, name: 'Banana' },
          { id: 12, name: 'Cherry' }
        ];

        db.transaction(function (tx) {
          products.forEach(function (p) {
            tx.executeSql(
              'INSERT OR REPLACE INTO items (id, name) VALUES (?, ?)',
              [p.id, p.name]
            );
          });
        }, function (error) {
          statusEl.textContent = 'Batch failed: ' + error.message;
          statusEl.className = 'err';
        }, function () {
          statusEl.textContent = 'All ' + products.length + ' rows inserted.';
          statusEl.className = 'ok';
          document.getElementById('listBtn').click();
        });
      });

      document.getElementById('listBtn').addEventListener('click', function () {
        db.transaction(function (tx) {
          tx.executeSql('SELECT id, name FROM items ORDER BY id', [], function (tx, result) {
            var rows = [];
            for (var i = 0; i < result.rows.length; i++) rows.push(result.rows.item(i));
            renderRows(rows);
          });
        });
      });
    }
  </script>
</body>
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Web SQL INSERT — Multiple Rows in One Transaction
