David Himmelstrup

Permanently losing data doesn't qualify as "really unsafe"? I hope you're not working in banking. :) I would be willing to downgrade it from "reallyUnsafe" to just "unsafe". At first...

Done.

Are there any well-supported javascript parsers for Rust? [Tree-sitter](https://crates.io/crates/tree-sitter-javascript) seems quite heavy-weight (and I couldn't get the WASM support working). [Almond](https://crates.io/crates/almond) looks to be a better fit but might not...

Maybe https://crates.io/crates/swc_ecma_parser or https://crates.io/crates/ressa

@patrickt Did the problem go away when you used Rationals?

Oh nice. I'll add some helper functions to this branch tomorrow.

This PR depends on improved property testing, #51.

Can we use hgeometry as an ipelet? I tried to find documentation for ipelets but didn't have any luck.

I think option three is very promising. We want an hgeometry executable in any case. Wrapping the executable in an ipelet should be quite doable. I'll give it a go....

hgeometry-web doesn't compile for me. It fails with: ``` src/Miso/Subscription/MouseExtra.hs:14:69: error: Not in scope: type constructor or class ‘Sub’ | 14 | relativeMouseSub :: MisoString -> ((Int,Int) -> action) ->...