UseSWR (Stale While Revalidating), is a hooks based protocol for updating state in React apps

As an example, consider this code:

const { data: todoList, error, mutate: mutateTodos } = useSWR(
    ["/api/todos", getToken],
    fetchWithToken
  );

In this code, the array ["/api/todos", getToken] is the list of parameters that will be passed to the function fetchWithToken.

TODO: Add more explanation and/or links to useful articles tutorials…