Re: [w3c/ServiceWorker] Using BroadcastChannel to wake up a service worker (#975)

> @jakearchibald
> 
> Doesn't https://developers.google.com/web/updates/2015/12/background-sync do this?

Background-sync only triggers an event "out of nowhere" so the data I need to send would not be accessible unless I use something like [localStorage](https://developer.mozilla.org/fr/docs/Web/API/Window/localStorage), which has a limit in storage capacity (5-10MB depending on browser).

The reports I need to send often reach up to 30-40MB, which is the main reason I want the upload to be in the background. It may take a while to upload this much data.

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