How to improve user experience in React using async workflows

Question

Can you explain How to improve user experience in React using async workflows?

Answer 1

It involves optimizing how your application handles asynchronous operations like data fetching, state updates, and side effects. Here are some precise strategies:

1. Use Loading States

Example:

const [data, setData] = useState(null);

const [loading, setLoading] = useState(false);

useEffect(() => {

  setLoading(true);

  fetchData().then(response => {

    setData(response);

    setLoading(false);

  });

}, []);

return loading ? <Spinner /> : <DataComponent data={data} />;

2. Optimistic Updates

Example:

const handleLike = async (postId) => {

  const previousLikes = posts[postId].likes;

  setPosts(prev => ({ ...prev, [postId]: { ...prev[postId], likes: previousLikes + 1 } }));


  try {

    await likePost(postId);

  } catch (error) {

    setPosts(prev => ({ ...prev, [postId]: { ...prev[postId], likes: previousLikes } }));

  }

};

3. Debounce or Throttle Input

Example with debounce:

const [query, setQuery] = useState('');

const debouncedQuery = useDebounce(query, 300);

useEffect(() => {

  fetchResults(debouncedQuery);

}, [debouncedQuery]);