[your_fin]

I would highly recommend the ts-pattern [1] library if you find yourself wanting exhaustive switch statements! The syntax is a bit noiser than case statements in simple cases, but I find it less awkward for exhaustive pattern matching and much harder to shoot yourself in the foot with. Once you get familiar with it, it can trim down a /lot/ of more complicated logic too.

It also makes match expressions an expression rather than a statement, so it can replace awkward terenaries. And it has no transitive dependencies!

[1]: https://github.com/gvergnaud/ts-pattern