React hooks: dispatch action from useEffect

Version using react-redux hooks:

You can even cut out the connect function completely by using useDispatch from react-redux:

export default function MyComponent() {
  useFetching(fetchSomething);

  return <div>Doing some fetching!</div>
}

with your custom hook

import { useDispatch } from 'react-redux';

const useFetching = (someFetchActionCreator) => {
  const dispatch = useDispatch();
  useEffect(() => {
    dispatch(someFetchActionCreator());
  }, [])
}

Edit: removed dispatch from custom hook as suggested by @yonga-springfield

Note: React guarantees that dispatch function identity is stable and won’t change on re-renders. This is why it’s safe to omit from the useEffect or useCallback dependency list.