Feedback for “Conditional Fetching”

[petertflem]

Hello! 👋

I am working with the conditional data fetching, and it seems like the following is true, even though I can't see it in the docs.

When sending a request with useSwr, the result will be undefined, if the key function changes to return null after first sending the request. For example:

const { data, isValidating } = useSWR(
    () => {
        if (someCondition) {
           return null;
       }

       return '/fetch/some/data';
    },
    fetcher
)

If someCondition changes after the request is sent, data will always be undefined, even if the initial request returns the data. Is this correct? It is what I am seeing in the app I am working on. Even though the request returns data, the data return value from useSwr is always undefined because the fetcher function changed to return null.