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Expose protected consumer render-prop #75

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Expose protected consumer render-prop #75

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22 changes: 21 additions & 1 deletion src/unstated-next.tsx
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Original file line number Diff line number Diff line change
Expand Up @@ -7,9 +7,14 @@ export interface ContainerProviderProps<State = void> {
children: React.ReactNode
}

export interface ContainerConsumerProps<Value> {
children: (value: Value) => React.ReactNode
}

export interface Container<Value, State = void> {
Provider: React.ComponentType<ContainerProviderProps<State>>
useContainer: () => Value
Consumer: React.ComponentType<ContainerConsumerProps<Value>>
}

export function createContainer<Value, State = void>(
Expand All @@ -30,7 +35,22 @@ export function createContainer<Value, State = void>(
return value
}

return { Provider, useContainer }
function Consumer(props: ContainerConsumerProps<Value>) {
return (
<Context.Consumer>
{value => {
if (value === EMPTY) {
throw new Error(
"Component must be wrapped with <Container.Provider>",
)
}
return props.children(value)
}}
</Context.Consumer>
)
}

return { Provider, useContainer, Consumer }
}

export function useContainer<Value, State = void>(
Expand Down