| 1 | import { ControllableReducerAction, ControllableReducerParameters } from './useControllableReducer.types';
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| 2 | /**
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| 3 | * The alternative to `React.useReducer` that lets you control the state from the outside.
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| 4 | *
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| 5 | * It can be used in an uncontrolled mode, similar to `React.useReducer`, or in a controlled mode, when the state is controlled by the props.
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| 6 | * It also supports partially controlled state, when some state items are controlled and some are not.
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| 7 | *
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| 8 | * The controlled state items are provided via the `controlledProps` parameter.
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| 9 | * When a reducer action is dispatched, the internal state is updated with the new values.
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| 10 | * A change event (`onStateChange`) is then triggered (for each changed state item) if the new state is different from the previous state.
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| 11 | * This event can be used to update the controlled values.
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| 12 | *
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| 13 | * The comparison of the previous and next states is done using the `stateComparers` parameter.
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| 14 | * If a state item has a corresponding comparer, it will be used to determine if the state has changed.
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| 15 | * This is useful when the state item is an object and you want to compare only a subset of its properties or if it's an array and you want to compare its contents.
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| 16 | *
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| 17 | * An additional feature is the `actionContext` parameter. It allows you to add additional properties to every action object,
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| 18 | * similarly to how React context is implicitly available to every component.
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| 19 | *
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| 20 | * @template State - The type of the state calculated by the reducer.
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| 21 | * @template Action - The type of the actions that can be dispatched.
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| 22 | * @template ActionContext - The type of the additional properties that will be added to every action object.
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| 23 | *
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| 24 | * @ignore - internal hook.
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| 25 | */
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| 26 | export declare function useControllableReducer<State extends {}, Action extends ControllableReducerAction, ActionContext = undefined>(parameters: ControllableReducerParameters<State, Action, ActionContext>): [State, (action: Action) => void];
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