AI solution for React Coding Question on BFE.dev
4. useSWR() I

To implement the basic usage of useSWR(), we need to import the useSWR hook and the fetcher function. The fetcher function is a simple function used to fetch data from the provided URL.

Here's a possible implementation:

import React from 'react';
import useSWR from 'swr';

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

function App() {
  const { data, error } = useSWR('/api', fetcher);

  if (error) return <div>failed</div>;
  if (!data) return <div>loading</div>;

  return <div>succeeded</div>;
}

Note that in this example, we're assuming that the API at /api returns a JSON response. If you're using a different data format, you need to adjust the fetcher function accordingly.