import { ViewSize } from '@js-toolkit/web-utils/responsive/ViewSize';
export type BreakpointsMergeType = 'up' | 'down';
export type Breakpoints<V = unknown> = Readonly<PartialRecord<ViewSize.Keys, V>>;
export interface MergeBreakpointsOptions<V = unknown> {
    /**
     * `down` - merge from top to down until current view size. Default.
     * `up` - merge from down to top until current view size.
     * `true` treats as `down`.
     * `false` - no merge, use only exact breakpoint.
     */
    merge?: boolean | BreakpointsMergeType | undefined;
    breakpoints: Breakpoints<V>;
}
export declare function forEachBreakpoints<V, A = V>(viewSize: ViewSize, breakpoints: Breakpoints<V>, merge: boolean | BreakpointsMergeType, callback: (value: V | undefined, acc: A, viewSize: ViewSize) => A, accumulator: A): A;
export declare function getLastMergedBreakpointsValue(viewSize: ViewSize, { merge, breakpoints }: MergeBreakpointsOptions<boolean | undefined>, fallbackResult: boolean): boolean;