Background Sync API: Send Data When the Network Returns
The Background Sync API lets your app defer work until the network is back. You register a task, and the browser wakes your service worker to run it when connectivity returns. Use it to reliably send data submitted while offline, like form posts or chat.
The Background Sync API lets your web app survive spotty connections by deferring tasks to a service worker. You register a sync task with a tag (e.g., 'send-messages'), and the browser runs it automatically when connectivity returns, even if the user has closed the tab. It's ideal for actions that must eventually reach a server, like sending form data or syncing state in an offline-first PWA. The main footgun is that the browser, not you, decides when to fire the event, so don't use it for time-critical operations.
Read the original → developer.mozilla.org
- #web apis
- #pwa
- #service worker
- #offline
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