Typescripts inferred types, can do some crazy things, and can be very powerful. This to me is really fun, but has definitely caused me when I first started using it to get lost in having fun doing crazy things, to ensure my strings were exactly some set of values depending on what some other value was, when a simple unit test and a simple "string" type, would've been a lot quicker and less confusing.
https://www.typescriptlang.org/docs/handbook/enums.html#enum...
https://www.typescriptlang.org/play/index.html?useDefineForC...
Really just a matter of preference though.
It's just you doing something stupid thinking you were being clever, as we all have.
One kind of weird thing we did, was we had these JSON Schema definitions that were const, so all the strings like "type" were of a literal string type. Then using recursive type definitions, and the `extends` key word we were able to extract the actual shape of the data into a type.
Not exactly that useful, compared to typing it out, but it was still kind of cool.