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Re:Show HN: 100% offline Shamir's Secret Sharing GUI by ahazred8ta on Wednesday June 17, 2020 @01:00AM (#23547980)
> save the HTML on your local machine, and then run it from there

Yes; there is another js Shamir utility that works like that; it requires you to download the html and refuses to run unless it detects that you are offline. :-)

https://bs.parity.io/#-BananaSplit-shamir

Re:Show HN: 100% offline Shamir's Secret Sharing GUI by ijpsud on Friday June 19, 2020 @12:30PM (#23576026)
> refuses to run unless it detects that you are offline

They could just display the "please disconnect" error for a while, then sneakily stop checking after some date, collecting data every time you forget to disconnect. You'd need to check the code, or never forget to disconnect - the latter is probably a mistake waiting to happen.

Chrome bug page for "offline-only PWAs" if you want to star it: https://bugs.chromium.org/p/chromium/issues/detail?id=995236