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21 lines
860 B
TypeScript
21 lines
860 B
TypeScript
export interface IArrayListener<T> {
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_onDataPush?(...item: T[]): void;
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_onDataPop?(): void;
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_onDataShift?(): void;
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_onDataSplice?(index: number, deleteCount: number, ...items: T[]): void;
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_onDataUnshift?(...item: T[]): void;
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}
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/**
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* Hooks the array methods that add or remove values ('push', pop', 'shift', 'splice',
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* 'unshift') and notify the listener AFTER the array has been altered. Listeners are
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* called on the '_onData*' callbacks (e.g. _onDataPush, etc.) with same arguments.
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*/
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export function listenArrayEvents<T>(array: T[], listener: IArrayListener<T>): void;
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/**
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* Removes the given array event listener and cleanup extra attached properties (such as
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* the _chartjs stub and overridden methods) if array doesn't have any more listeners.
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*/
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export function unlistenArrayEvents<T>(array: T[], listener: IArrayListener<T>): void;
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