Service that keeps running when WASM page is closed

[Toine-db]

Is there a way to implement a service that keeps on running when the Blazor WASM page is closed and the browser is still open.
Googles workbox has a solution that does exactly that with 'workbox-background-sync' for syncing purposes.

My use case would be to use when the app was working and closed offline, to send / sync data in the background as soon as the browser reconnects with internet. But it can be used for other small (none UI) processes as well of course.

Anyone ideas how to accomplish this?
Can WASM code operate when the page is closed, just like 'workbox-background-sync' does?