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Fix generic type of useNavigationParam #71

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Fix generic type of useNavigationParam #71

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8 changes: 4 additions & 4 deletions src/Hooks.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -17,7 +17,7 @@ import {
EventType,
} from 'react-navigation';

export function useNavigation<S>(): NavigationScreenProp<S & NavigationRoute> {
export function useNavigation<S, P = NavigationParams>(): NavigationScreenProp<S & NavigationRoute, P> {
const navigation = useContext(NavigationContext) as any; // TODO typing?
if (!navigation) {
throw new Error(
Expand All @@ -29,10 +29,10 @@ export function useNavigation<S>(): NavigationScreenProp<S & NavigationRoute> {
return navigation;
}

export function useNavigationParam<T extends keyof NavigationParams>(
paramName: T
export function useNavigationParam<Params extends NavigationParams = NavigationParams>(
paramName: keyof Params
) {
return useNavigation().getParam(paramName);
return useNavigation<unknown, Params>().getParam(paramName) as Params[typeof paramName] | undefined
}

export function useNavigationState() {
Expand Down