← Back to home

Complete PWA Architecture

A production blueprint for building resilient Next.js PWAs that remain functional in unstable network conditions and synchronize safely when connectivity returns.

1) Client Shell and Install Layer

  • •Manifest setup, install prompt handling, and standalone mode constraints.
  • •Persistent app shell navigation and route-level loading states.
  • •Asset pre-cache strategy to keep shell responsive after first visit.

2) Service Worker Strategy Matrix

  • •Cache-first for immutable static assets and icon/font bundles.
  • •Network-first with fallback for frequently changing data endpoints.
  • •Stale-while-revalidate for catalogs/lists where freshness can lag briefly.

3) IndexedDB Data Plane

  • •Domain-based object stores with deterministic keys and compound indexes.
  • •Schema versioning and migration scripts to keep historical data valid.
  • •Transactional writes for critical user actions to prevent partial state.

4) Sync and Conflict Resolution

  • •Outbox queue with idempotency keys and replay scheduling.
  • •Exponential backoff + dead-letter channel for non-recoverable failures.
  • •Merge policies and user-facing conflict resolution workflows.

5) Observability and Recovery

  • •Track queue depth, replay success rate, and average sync latency.
  • •Release-time safeguards for service worker updates and DB migrations.
  • •Feature flags to disable risky sync paths without full rollback.