oak stream
I have a simple generic function which I'd like to get the return type of.
if ('a' in a) {
return 1;
}
return 2;
}```
I want to do something like this:
```type Something = ReturnType<typeof testing<{ a: 1 }>> // Should be 1```
That doesn't work, because `ReturnType` can't take a generic. How can I make it work?I found this answer https://stackoverflow.com/questions/50321419/typescript-returntype-of-generic-function
But the problem is that I have a list of these functions, so i'd need to declare a new class for each of them, and Wrapper<T> wouldn't work any more because i'd have Wrapper1, Wrapper2, etc.
slow creek
@oak stream Your original code does work though?
topaz ravenBOT
declare const testing: <T extends { a: number } | { b: number }>(
a: T,
) => T extends { a: number } ? 1 : 2
type Something = ReturnType<typeof testing<{ a: 1 }>>
// ^? - type Something = 1
south crown