Mirko, you would have no worries. The license basically means that an entity that sues facebook may lose the patent grants facebook has. So if I sue Facebook, I might lose my patent grant to distribute React based software, but you would not be affected in any way. The license cannot be revoked.

Kyle

If you are right and that is the issue, does that mean Koha would
not be Free Software anymore unless everything React is reverted?

That sounds like something I would not just push away with "i don't
imagine that happening", it sounds scary and not a way I want to go.

I don't see how a license that can be revoked for whatever reasons
could work for us.

-- Mirko