HTML Code
<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Web SQL — openDatabase</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; }
    button {
      padding: 0.55rem 1rem;
      font-size: 0.9375rem;
      background: #2563eb;
      color: #fff;
      border: none;
      border-radius: 8px;
      cursor: pointer;
    }
    button:hover { background: #1d4ed8; }
    #status {
      margin-top: 1rem;
      padding: 0.75rem 1rem;
      max-width: 440px;
      background: #fff;
      border: 1px solid #e2e8f0;
      border-radius: 8px;
      font-size: 0.875rem;
    }
    #status.ok { border-left: 4px solid #22c55e; }
    #status.err { border-left: 4px solid #ef4444; }
    .hint {
      margin-top: 1rem;
      font-size: 0.8125rem;
      color: #64748b;
      max-width: 440px;
    }
    code { background: #e2e8f0; padding: 0.1rem 0.35rem; border-radius: 4px; }
  </style>
</head>
<body>
  <h1>Open a Web SQL database</h1>
  <p>Click the button to run <code>openDatabase()</code> and <code>CREATE TABLE</code> inside a transaction.</p>

  <button type="button" id="setupBtn">Create contacts table</button>
  <p id="status">Ready. Click the button to set up the database.</p>
  <p class="hint">If Web SQL is not supported, the status box will tell you. Try Safari on older iOS/macOS builds.</p>

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

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

      document.getElementById('setupBtn').addEventListener('click', function () {
        db.transaction(function (tx) {
          tx.executeSql(
            'CREATE TABLE IF NOT EXISTS contacts (id INTEGER PRIMARY KEY, name TEXT, email TEXT)',
            [],
            function () {
              statusEl.textContent = 'Table "contacts" is ready. You can INSERT rows next.';
              statusEl.className = 'ok';
            },
            function (tx, error) {
              statusEl.textContent = 'Error: ' + error.message;
              statusEl.className = 'err';
              return true;
            }
          );
        });
      });
    }
  </script>
</body>
</html>
Lines: 0 | Characters: 0
Live Preview Auto-refresh on Run
Web SQL — Open Database & Create Table
