Open file with system application in a Progressive Web App

I'm trying to figure out if it is possible to open a file from a Progressive Web App with the default system application.

The idea is that a PWA would store for offline use some files (e.g. a .docx file), and that the user would be able to open them without (re)downloading them.

The ideal situation would be that the PWA is able to load into memory the file, make it accessible to the default system application for that file type (e.g. Word for .docx files), watch for changes (i.e. the user saves edits), and then store it back into the PWA storage. Even a read-only solution would be great.

Since there are serious security issues implied, and since from a Google search nothing came up, my best bet is that this is not (yet) supported. However, I'm hoping that there might be a way to do it of which I'm unaware and that does not require the user to download a copy of the file.



Read more here: https://stackoverflow.com/questions/50716986/open-file-with-system-application-in-a-progressive-web-app

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