platform-guideline checked
MDN PWA offline and background operation
Documents service-worker controlled pages, Cache API use, cache-first strategies, offline fallback pages, background synchronization, and intermittent-connectivity support for progressive web apps.
Pattern Decisions This Source Supports
| Pattern | Supported decision | Required contract | Claim note |
|---|---|---|---|
| Offline mobile retry | Choose offline mobile retry when a mobile action should be preserved and retried after connection loss, flaky network, app backgrounding, or policy-limited connectivity. | The UI never reports server success for a mobile action that is only saved locally or queued. | Supports offline fallback, service-worker behavior, caching, and background operation for PWAs. |
| Offline state | Choose offline state when connection loss changes what users can read, edit, save, submit, refresh, upload, export, or share. | The offline indicator appears only when connectivity affects the current task or a global app capability users can reasonably act on. | MDN supports service workers, Cache API strategies, offline fallback pages, and background operations for intermittent connectivity. |
Evidence Role
This source is treated as platform-guideline evidence. Use it to validate the decision rules above, not as a visual style reference.
Publisher: MDN Web Docs. Last checked: .