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Background sync mdn. Sep 9, 2025 · The modern way Periodic background sync lets you show fresh content when a progressive web app or service worker-backed page is launched. You can do this from Dec 8, 2015 · Background sync is a new web API that lets you defer actions until the user has stable connectivity. . Apr 22, 2024 · The Background Synchronization API enables a web app to defer tasks so that they can be run in a service worker once the user has a stable network connection. It does this by downloading data in the background when the app or page is not being used. This is useful for ensuring that whatever the user wants to send, is actually sent. Background sync enables the app to ask its service worker to perform a task on its behalf. Nov 10, 2021 · The sync event is considered to run in the background if no service worker clients whose frame type is top-level or auxiliary exist for the origin of the corresponding service worker registration. Using the Periodic Background Sync API After the service worker is installed, use the Permissions API to query for periodic-background-sync. Jul 18, 2023 · Background Data Sync The Push API can be used to trigger background data synchronization between a web application and a user's device. Jun 23, 2025 · Background sync, defined in the Background Synchronization API, is the solution to this problem for PWAs. For instance, a note-taking application can use push notifications to inform users about updates made on other devices and automatically sync the changes in the background. Jun 25, 2025 · How to do work in the background when the app isn't running, to synchronize content with the server, fetch new resources, or handle long-duration downloads. pkiej cry wmxi hbrt ygun acw sxebm jgao lxgbjc zohfid