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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>Web SQL INSERT</title>
  <style>
    body { font-family: system-ui, sans-serif; margin: 1.5rem; line-height: 1.5; }
    button { padding: 0.5rem 0.9rem; cursor: pointer; }
    #status { margin-top: 1rem; }
  </style>
</head>
<body>
  <h1>Insert a row</h1>
  <p>Run <code>INSERT INTO contacts (name, email) VALUES (?, ?)</code>.</p>

  <button type="button" id="insertBtn" disabled>Insert Alex</button>
  <p id="status">Opening&hellip;</p>

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

    if (!window.openDatabase) {
      statusEl.textContent = 'Web SQL is not available.';
    } else {
      var db = openDatabase('tryitHubInsert', '1.0', 'Try It', 1024 * 1024);
      db.transaction(function (tx) {
        tx.executeSql(
          'CREATE TABLE IF NOT EXISTS contacts (id INTEGER PRIMARY KEY, name TEXT, email TEXT)'
        );
      }, null, function () {
        statusEl.textContent = 'Ready.';
        insertBtn.disabled = false;
      });

      insertBtn.addEventListener('click', function () {
        db.transaction(function (tx) {
          tx.executeSql(
            'INSERT INTO contacts (name, email) VALUES (?, ?)',
            ['Alex Rivera', 'alex@example.com'],
            function (tx, result) {
              statusEl.textContent = 'Inserted id: ' + result.insertId;
            }
          );
        });
      });
    }
  </script>
</body>
</html>

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Web SQL — Insert a Row