Function fetchData

demos/suspense-use/Cpn.tsx:10–18

(id, timeout)

const cachePool: any[] = [];

function fetchData(id, timeout) {
	const cache = cachePool[id];
	if (cache) {
		return cache;
	}
	return (cachePool[id] = delay(timeout).then(() => {
		return { data: Math.random().toFixed(2) * 100 };
	}));
}

export function Cpn({ id, timeout }) {
	const [num, updateNum] = useState(0);