27 lines
1.0 KiB
Plaintext
27 lines
1.0 KiB
Plaintext
import { AnyUpdater, Listener } from './types.js';
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export interface StoreOptions<TState, TUpdater extends AnyUpdater = (cb: TState) => TState> {
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/**
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* Replace the default update function with a custom one.
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*/
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updateFn?: (previous: TState) => (updater: TUpdater) => TState;
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/**
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* Called when a listener subscribes to the store.
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*
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* @return a function to unsubscribe the listener
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*/
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onSubscribe?: (listener: Listener<TState>, store: Store<TState, TUpdater>) => () => void;
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/**
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* Called after the state has been updated, used to derive other state.
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*/
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onUpdate?: () => void;
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}
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export declare class Store<TState, TUpdater extends AnyUpdater = (cb: TState) => TState> {
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listeners: Set<Listener<TState>>;
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state: TState;
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prevState: TState;
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options?: StoreOptions<TState, TUpdater>;
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constructor(initialState: TState, options?: StoreOptions<TState, TUpdater>);
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subscribe: (listener: Listener<TState>) => () => void;
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setState: (updater: TUpdater) => void;
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}
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