How do you handle data conflicts when syncing?

We implement configurable conflict resolution strategies: last-write-wins for simple cases, merge strategies for collaborative data, and manual conflict resolution UI for critical business data.

Does offline support work on all browsers?

Service workers and IndexedDB are supported in all modern browsers (Chrome, Firefox, Safari, Edge). We implement graceful degradation for older browsers that lack service worker support.

How much data can be stored offline?

Modern browsers allow up to 60% of available disk space for origin storage. For typical apps, this means hundreds of megabytes to several gigabytes. We implement storage quota monitoring and cleanup strategies.

Can offline support work with mobile apps?

Yes. For React Native and Flutter apps, we use local databases (SQLite, Realm) with background sync. For PWAs, we use the same service worker approach that works on mobile browsers.

Make Your App Work Anywhere, Even Without Internet

Bookuvai builds offline-capable applications with service workers, local-first data storage, and automatic background sync for uninterrupted user experiences.

Feature: Offline Support

Offline support ensures your application remains functional when users lose internet connectivity, whether they are in a subway, on a plane, or at a remote job site. A proper offline implementation caches critical assets and data locally, queues user actions for later sync, handles conflicts when reconnecting, and provides clear UI feedback about connectivity status.

Benefits

Uninterrupted User Experience: Users can continue working without frustration when connectivity drops. Forms, edits, and actions are preserved and synced automatically.
Faster Perceived Performance: Locally cached data loads instantly, making the app feel faster even with good connectivity. Network requests happen in the background.
Field and Remote Use Cases: Essential for applications used in construction sites, mines, warehouses, and rural areas where connectivity is unreliable.
Reduced Server Load: Local-first architecture reduces API calls by serving cached data first and batching sync operations, lowering server costs.

How It Works

Offline Strategy Design: We analyze your app's data access patterns and user workflows to design the optimal offline strategy: cache-first, network-first, or stale-while-revalidate.
Service Worker and Caching: We implement service workers with Workbox to cache static assets, API responses, and critical data for offline access with versioned cache management.
Local Data Storage: We set up IndexedDB or SQLite (via OPFS) for local data storage with schema management, queries, and storage quota handling.
Sync Engine and Conflict Resolution: We build a background sync engine that queues offline mutations, retries on reconnection, and resolves conflicts with configurable strategies.

Technology Options

Workbox + IndexedDB: Google's Workbox library for service worker management paired with IndexedDB for structured offline data storage. Mature and well-documented. (Best for: Progressive web apps needing reliable offline caching and data persistence)
TanStack Query Offline Mode: TanStack Query's built-in offline support with mutation queuing, automatic retry, and optimistic updates for React applications. (Best for: React apps wanting offline support with minimal architecture changes)
CRDT-Based Local-First (Yjs / Automerge): CRDT libraries that enable true local-first applications with conflict-free offline editing and peer-to-peer sync. (Best for: Collaborative apps needing offline editing with automatic conflict resolution)

Estimated Hours

Simple: 20-40 hrs | Moderate: 40-80 hrs | Complex: 80-160 hrs

Frequently Asked Questions

How do you handle data conflicts when syncing?: We implement configurable conflict resolution strategies: last-write-wins for simple cases, merge strategies for collaborative data, and manual conflict resolution UI for critical business data.
Does offline support work on all browsers?: Service workers and IndexedDB are supported in all modern browsers (Chrome, Firefox, Safari, Edge). We implement graceful degradation for older browsers that lack service worker support.
How much data can be stored offline?: Modern browsers allow up to 60% of available disk space for origin storage. For typical apps, this means hundreds of megabytes to several gigabytes. We implement storage quota monitoring and cleanup strategies.
Can offline support work with mobile apps?: Yes. For React Native and Flutter apps, we use local databases (SQLite, Realm) with background sync. For PWAs, we use the same service worker approach that works on mobile browsers.