So the biggest issue is the project relies extremely heavily on a third party API service, and since the data is received over said service, typescript is unable to infer what the objects the API is sending is because it sends during runtime, to get around this I have to define everything that I expect that the library is going to have to handle that would be Recieved, since any object that the API is going to return is just going to have a type of any if it's not defined, this on top of the fact that the API has stated that the data being sent should not be relied on for being accurate and types may change randomly(usually it does not but it has happend, it sucks but out of my control) means that I generally also have to have a function level test the data when it's received to make sure that the value is being supplied are the correct type and are formatted in a way that the library can still understand it. Which means that it's able to catch any inconsistency of typing before it would be processed anyway, and would either warn or throw depending on how important the function is to actual operation.

The reason why I would call it standard is because it seems like basically anywhere you look if you are using node, you're using typescript they go hand in hand it seems as of the last two or three years, but honestly I've never really understood the benefit of, I've always thought it was a fairly standard to have at the beginning of a function the documentation of what each perimeter should be unless it is easily verified by looking at it.

As for my setup, it's not very advanced it's just Sublime Text with linter hooked to it, which does tell me on save if there's a typescript error or if I formatted something wrong, but again even if one did happen to slip through that it would fail during the testing phase due to the fact that it would throw at the function level.

My opinion of my experience with typescript has been that it's great if everything is operated in house, but the second you start having to deal with stuff that comes from an external source any advantage of the check just seems not worth the extra effort to make sure typescript works right.