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fix(useCustomCompareMemo): Correctly infer factory function return type #976

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Oct 22, 2022
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fix(useCustomCompareMemo): Correctly infer factory function return type #976

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6 changes: 3 additions & 3 deletions src/useCustomCompareMemo/__docs__/story.mdx
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Original file line number Diff line number Diff line change
Expand Up @@ -22,11 +22,11 @@ export type DependenciesComparator<Deps extends DependencyList = DependencyList>
b: Deps
) => boolean;

function useCustomCompareMemo<Factory extends () => unknown, Deps extends DependencyList>(
factory: Factory,
function useCustomCompareMemo<T, Deps extends DependencyList>(
factory: () => T,
deps: Deps,
comparator: DependenciesComparator<Deps>
): ReturnType<Factory>;
): T
```

#### Importing
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8 changes: 4 additions & 4 deletions src/useCustomCompareMemo/useCustomCompareMemo.ts
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Expand Up @@ -10,17 +10,17 @@ import type { DependenciesComparator } from '../types';
* @param comparator function to validate dependency changes
* @returns useMemo result
*/
export const useCustomCompareMemo = <Factory extends () => unknown, Deps extends DependencyList>(
factory: Factory,
export const useCustomCompareMemo = <T, Deps extends DependencyList>(
factory: () => T,
deps: Deps,
comparator: DependenciesComparator<Deps>
) => {
): T => {
const dependencies = useRef<Deps>();

if (dependencies.current === undefined || !comparator(dependencies.current, deps)) {
dependencies.current = deps;
}

// eslint-disable-next-line react-hooks/exhaustive-deps -- missing factory function
return useMemo(factory, dependencies.current);
return useMemo<T>(factory, dependencies.current);
};