Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 | 1x 2x 2x 1x 1x 1x 2x 2x 2x | import {
createContext,
PropsWithChildren,
useContext,
useEffect,
useMemo,
useReducer,
} from "react";
import { delay } from "./delay";
const RenderingContext = createContext<{ calls: number }>({ calls: 0 });
/**
* This is a component that rerenders after a short delay
*/
export function RerenderingProvider({
children,
}: PropsWithChildren<{}>): JSX.Element {
const [calls, forceUpdate] = useReducer((prev: number) => prev + 1, 0);
useEffect(() => {
(async function asyncEffect() {
await delay(10000);
forceUpdate();
})();
}, []);
const contextValue = useMemo(()=>({calls}),[calls]);
return (
<RenderingContext.Provider value={contextValue}>
{children}
</RenderingContext.Provider>
);
}
export function useRerendering(): { calls: number } {
return useContext(RenderingContext);
}
|