React useEffectの使い方

import React, { useState, useEffect } from "react";
import axios from "axios";

function App() {
	const [items, setItem] = useState([]);
	const [isLoading, setIsLoading] = useState(false);

	useEffect(() => {
		const fetchData = async () => {
			setIsLoading(true);
			const result = await axios(
				"https://hn.algolia.com/api/v1/search?query=react"
			);
			setItem(result.data.hits);
			setIsLoading(false);
		};
		fetchData();
	}, []);

	return (
		<>
			{isLoading ? (
				<p>Loading</p>
			) : (
				<ul>
					{items.map((item) => (
						<li key={item.objectID}>
							<a href={item.url}>{item.title}</a>
						</li>
					))}
				</ul>
			)}
		</>
	);
}

export default App;

useEffectの第2引数に空配列を指定して、一回だけ実行するようにしている