Download of media files for offline playback and consumption

[dellagustin]

One essential feature is for podcast aggregators is to download media for offline consumption.
This is a rather challenging requirement for PWAs, as the options for accessing the local file system currently not mature.

Existing options (ideas):

• Fetch data and save on Cache (see Cache API)
  • Use background fetch when available
• File System API (requestFileSystem) [1]
  • Cons
    • Only available on chrome
• Native File System API
  • Save to the Origin Private File System (https://wicg.github.io/file-system-access/#sandboxed-filesystem)

[1] - https://web.dev/storage-for-the-web/

CORS will also be an issue here (#1)
See also: WICG/file-system-access#29 (comment)

h1. References

• Background Fetch API
  • https://github.com/WICG/background-fetch
  • https://medium.com/google-developer-experts/background-fetch-api-get-ready-to-use-it-69cca522cd8f