mirror of
https://github.com/idanoo/GoScrobble.git
synced 2024-11-23 00:45:16 +00:00
23 lines
884 B
TypeScript
23 lines
884 B
TypeScript
declare type Updater<TState> = (state: TState) => Partial<TState> | null;
|
|
/**
|
|
* Updates state, partial updates are merged into existing state values
|
|
*/
|
|
export declare type MergeStateSetter<TState> = (update: Updater<TState> | Partial<TState> | null) => void;
|
|
/**
|
|
* Mimics a React class component's state model, of having a single unified
|
|
* `state` object and an updater that merges updates into the existing state, as
|
|
* opposed to replacing it.
|
|
*
|
|
* ```js
|
|
* const [state, setState] = useMergeState({ name: 'Betsy', age: 24 })
|
|
*
|
|
* setState({ name: 'Johan' }) // { name: 'Johan', age: 24 }
|
|
*
|
|
* setState(state => ({ age: state.age + 10 })) // { name: 'Johan', age: 34 }
|
|
* ```
|
|
*
|
|
* @param initialState The initial state object
|
|
*/
|
|
export default function useMergeState<TState extends {}>(initialState: TState | (() => TState)): [TState, MergeStateSetter<TState>];
|
|
export {};
|