How do I create a custom hook in React?

How do I create a custom hook in React?

Creating a custom hook in React involves defining a function that uses built-in hooks. What functionality do you want to implement?

I want to create a hook for fetching data from an API.

You can create a custom hook like this: function useFetch(url) { const [data, setData] = useState(null); useEffect(() => { fetch(url).then(response => response.json()).then(setData); }, [url]); return data; }. Would you like more details?

Yes, how do I handle loading and error states?

You can extend the hook to include loading and error states like this: function useFetch(url) { const [data, setData] = useState(null); const [loading, setLoading] = useState(true); const [error, setError] = useState(null); useEffect(() => { fetch(url) .then(response => { if (!response.ok) throw new Error('Network response was not ok'); return response.json(); }) .then(setData) .catch(setError) .finally(() => setLoading(false)); }, [url]); return { data, loading, error }; }. This way, you can manage all states effectively.