import type { ChartFocusFilter, ChartMark, ChartValue } from './types.js';
export declare function whenFocused<TDatum, TXPointValue extends ChartValue, TYPointValue extends ChartValue, TXScaleValue extends ChartValue, TYScaleValue extends ChartValue, TXScaleId extends string, TYScaleId extends string>(mark: ChartMark<TDatum, TXPointValue, TYPointValue, TXScaleValue, TYScaleValue, TXScaleId, TYScaleId>, options?: ChartFocusFilter): ChartMark<TDatum, TXPointValue, TYPointValue, TXScaleValue, TYScaleValue, TXScaleId, TYScaleId>;