Many of you know dynamic geometry exercises in [Euclidea][1]; if not, here is [one example][2].
It lets you do a geometric construction and sends a message once you achieve the result.

I am looking for a way to produce exercises for students in a similar form.
At the moment I use [C.a.R.][3] which uses Java plugins.
But as you may know, all major browsers stopped supporting Java plugins in 2014 or so.
So I [have to make my students install JDK (or OpenJDK)][4] which is not fun.

There is plenty of software that does dynamic geometry, but as far as I see nothing else has the exercise mode that I need; **or did I miss something?**


  [1]: https://www.euclidea.xyz/en/
  [2]: https://www.euclidea.xyz/en/game/11.5
  [3]: http://car.rene-grothmann.de/doc_en/index.html
  [4]: https://anton-petrunin.github.io/birkhoff/car/index.html