JavaScript Enterprise Architecture & Custom Engineering

// ChittorTech Service Worker Offline Queue Sync Engine
const SYNC_DB = 'ChittorTech_Offline_POS';
async function processOfflineQueue() {
  const db = await openIndexedDB(SYNC_DB);
  const pendingInvoices = await db.getAll('pending_sales');
  
  for (const invoice of pendingInvoices) {
    try {
      const res = await fetch('/api/sync-invoice', {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify(invoice)
      });
      if (res.ok) await db.delete('pending_sales', invoice.id);
    } catch (netErr) {
      console.warn('Network offline, retrying on next cycle...');
      break;
    }
  }
}