Use undefined instead of void #26
Description
It looks like the loading utility hook types the value property as void. This makes it difficult to work around potential edge cases in the code:
let [ user, userIsLoading, userError ] = useAuthState(firebase.auth());
if (userIsLoading) {
return null;
}
// do something with user ...
user.someProperty; // <- errors with "someProperty doesn't exist on type void | User"The problem here is that, because user is typed as possibly being void (which is different from undefined), I can't even do something like user!.someProperty to assure TS that the variable will have a value.
I think the fix here is to switch to undefined as the fallback type.