They are though. What if the API you're relying on doesn't have types and it returns something you didn't expect.
I think this is the biggest gotcha for developers who are using typescript. Typescript doesn't do runtime type checks, so if you're calling out to something third party that isn't written in typescript, you can't trust it'll return what you think it returns.
I think this is the biggest gotcha for developers who are using typescript. Typescript doesn't do runtime type checks, so if you're calling out to something third party that isn't written in typescript, you can't trust it'll return what you think it returns.