[deathtrader666]

Check out Miso [1] a frontend framework built in Haskell.

[1] - https://haskell-miso.org/

[frou_dh]

I look at the opening stanza of the first example:

https://github.com/dmjio/miso/blob/master/examples/todo-mvc/...

"We're not in Kansas anymore"

[Tarean]

RecordWildCards and DeriveGeneric are clearly used but fairly basic. OverloadedStrings seems to be used for MisoString.

The other extensions don't seem to be used so it probably isn't as bad as it looks.