()
| 1 | import { useEffect, useLayoutEffect, useState } from "react"; |
| 2 | |
| 3 | async function queryData() { |
| 4 | const data = await new Promise<number>((resolve) => { |
| 5 | setTimeout(() => { |
| 6 | resolve(666); |
| 7 | }, 2000); |
| 8 | }) |
| 9 | return data; |
| 10 | } |
| 11 | |
| 12 | function App() { |
| 13 | const [num, setNum] = useState(0); |