If loading is false and error is undefined, what can we assume?

[joepetrillo]

If loading is false and error is undefined, can I assume data is not undefined? (using typescript)

Is it ok to always have to use data like this data?.something (since it is possibly undefined).

Is there a more standard way to know for sure when data is ready to be used on the UI? Should I always do something like data && <Component/>?

Thanks!