No repo needed. Just return an error component for expected errors and use the error.ts to handle unexpected errors. Attached you can see an easy example

my backend engineer wants me to use try catches everywhere, is it non-sense?

(thanks for the example code will be useful)

that would work, when you throw the error. But when he throws the error, he need to also handle the error correctly (for example by setting the correct status code or by setting the error message). That can then be read by you (like I am doing with request.ok and getting the error message by using .text())

Your backend dev might work differently and maybe always return you json, then it#s a bit different for you

aight thanks for the help, have a good one