Background Sync

Queue tasks for background synchronization when offline and automatically sync when back online

MDN Documentation

Implementation Example

This example demonstrates how to implement background sync for offline-first web applications. Tasks are queued when offline and automatically synchronized when the connection is restored.

Task Queue
Add tasks while offline and watch them sync automatically when back online
Online

How It Works

The Background Sync API allows web applications to queue tasks for background synchronization when offline and automatically sync when the connection is restored.

Service Worker
  • Registers a background sync queue
  • Handles fetch events for task sync
  • Queues failed requests for retry
  • Notifies clients of successful syncs
Client Side
  • Manages task state and UI
  • Handles online/offline status
  • Listens for sync messages
  • Updates UI based on sync status