SWR vs React Query: Which is Better for TypeScript?

What are the main differences between SWR and React Query when using TypeScript?

SWR and React Query are both data fetching libraries, but they have different philosophies. SWR focuses on simplicity and revalidation, while React Query offers more features like caching and background updates. In TypeScript, both libraries provide good type support, but React Query has more built-in types for complex scenarios.

Can you give me an example of how to use SWR with TypeScript?

Sure! Here's a simple example:

import useSWR from 'swr';

const fetcher = (url: string) => fetch(url).then(res => res.json());

function App() {
  const { data, error } = useSWR<DataType>('https://api.example.com/data', fetcher);

  if (error) return <div>Error loading data</div>;
  if (!data) return <div>Loading...</div>;

  return <div>{data.name}</div>;
}

What about React Query? Can you show me a TypeScript example?

Absolutely! Here's how you can use React Query with TypeScript:

import { useQuery } from 'react-query';

const fetchData = async (): Promise<DataType> => {
  const response = await fetch('https://api.example.com/data');
  return response.json();
};

function App() {
  const { data, error, isLoading } = useQuery<DataType>('data', fetchData);

  if (isLoading) return <div>Loading...</div>;
  if (error) return <div>Error loading data</div>;

  return <div>{data.name}</div>;
}