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@xarc/react
  • @xarc/react
  • common
  • React
  • useReducer

Function useReducer

  • useReducer<R, I>(reducer, initializerArg, initializer): [ReducerStateWithoutAction<R>, DispatchWithoutAction]
  • An alternative to useState.

    useReducer is usually preferable to useState when you have complex state logic that involves multiple sub-values. It also lets you optimize performance for components that trigger deep updates because you can pass dispatch down instead of callbacks.

    Type Parameters

    • R extends ReducerWithoutAction<any>
    • I

    Parameters

    • reducer: R
    • initializerArg: I
    • initializer: ((arg) => ReducerStateWithoutAction<R>)
        • (arg): ReducerStateWithoutAction<R>
        • Parameters

          • arg: I

          Returns ReducerStateWithoutAction<R>

    Returns [ReducerStateWithoutAction<R>, DispatchWithoutAction]

    Version

    16.8.0

    See

    https://react.dev/reference/react/useReducer

    • Defined in common/temp/node_modules/.pnpm/@types+react@18.3.3/node_modules/@types/react/index.d.ts:1889
  • useReducer<R>(reducer, initializerArg, initializer?): [ReducerStateWithoutAction<R>, DispatchWithoutAction]
  • An alternative to useState.

    useReducer is usually preferable to useState when you have complex state logic that involves multiple sub-values. It also lets you optimize performance for components that trigger deep updates because you can pass dispatch down instead of callbacks.

    Type Parameters

    • R extends ReducerWithoutAction<any>

    Parameters

    • reducer: R
    • initializerArg: ReducerStateWithoutAction<R>
    • Optional initializer: undefined

    Returns [ReducerStateWithoutAction<R>, DispatchWithoutAction]

    Version

    16.8.0

    See

    https://react.dev/reference/react/useReducer

    • Defined in common/temp/node_modules/.pnpm/@types+react@18.3.3/node_modules/@types/react/index.d.ts:1905
  • useReducer<R, I>(reducer, initializerArg, initializer): [ReducerState<R>, Dispatch<ReducerAction<R>>]
  • An alternative to useState.

    useReducer is usually preferable to useState when you have complex state logic that involves multiple sub-values. It also lets you optimize performance for components that trigger deep updates because you can pass dispatch down instead of callbacks.

    Type Parameters

    • R extends Reducer<any, any>
    • I

    Parameters

    • reducer: R
    • initializerArg: I & ReducerState<R>
    • initializer: ((arg) => ReducerState<R>)
        • (arg): ReducerState<R>
        • Parameters

          • arg: I & ReducerState<R>

          Returns ReducerState<R>

    Returns [ReducerState<R>, Dispatch<ReducerAction<R>>]

    Version

    16.8.0

    See

    https://react.dev/reference/react/useReducer

    • Defined in common/temp/node_modules/.pnpm/@types+react@18.3.3/node_modules/@types/react/index.d.ts:1923
  • useReducer<R, I>(reducer, initializerArg, initializer): [ReducerState<R>, Dispatch<ReducerAction<R>>]
  • An alternative to useState.

    useReducer is usually preferable to useState when you have complex state logic that involves multiple sub-values. It also lets you optimize performance for components that trigger deep updates because you can pass dispatch down instead of callbacks.

    Type Parameters

    • R extends Reducer<any, any>
    • I

    Parameters

    • reducer: R
    • initializerArg: I
    • initializer: ((arg) => ReducerState<R>)
        • (arg): ReducerState<R>
        • Parameters

          • arg: I

          Returns ReducerState<R>

    Returns [ReducerState<R>, Dispatch<ReducerAction<R>>]

    Version

    16.8.0

    See

    https://react.dev/reference/react/useReducer

    • Defined in common/temp/node_modules/.pnpm/@types+react@18.3.3/node_modules/@types/react/index.d.ts:1939
  • useReducer<R>(reducer, initialState, initializer?): [ReducerState<R>, Dispatch<ReducerAction<R>>]
  • An alternative to useState.

    useReducer is usually preferable to useState when you have complex state logic that involves multiple sub-values. It also lets you optimize performance for components that trigger deep updates because you can pass dispatch down instead of callbacks.

    Type Parameters

    • R extends Reducer<any, any>

    Parameters

    • reducer: R
    • initialState: ReducerState<R>
    • Optional initializer: undefined

    Returns [ReducerState<R>, Dispatch<ReducerAction<R>>]

    Version

    16.8.0

    See

    https://react.dev/reference/react/useReducer

    • Defined in common/temp/node_modules/.pnpm/@types+react@18.3.3/node_modules/@types/react/index.d.ts:1964

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