import { Size } from './types';
export type BreakpointName = 'xs' | 'sm' | 'md' | 'lg' | 'xl' | '2xl';
/**
 * Map from breakpoint to component size. A key applies at that breakpoint and all narrower ones (e.g. md:lg → xs, sm, md use lg).
 */
export type BreakpointToSizeMap = Partial<Record<BreakpointName, Size>>;
/**
 * Parses a string like "sm:lg,md:md" into a BreakpointToSizeMap.
 * Key = breakpoint (xs, sm, md, lg, xl, 2xl). Value = component size (xxs, xs, sm, md, lg).
 * Invalid pairs are skipped. Returns undefined for empty/null/whitespace.
 */
export declare function parseResponsiveSizeMap(value: string | null | undefined): BreakpointToSizeMap | undefined;
/**
 * Returns the effective component size from the breakpoint→size map.
 * A map entry like "md:lg" applies at that breakpoint and all narrower breakpoints (xs, sm, md).
 * With multiple entries we use the narrowest matching key (most specific). E.g. "sm:lg,md:md" → xs/sm use lg, md uses md.
 */
export declare function getResponsiveSize(requestedSize: Size, breakpointToSizeMap: BreakpointToSizeMap | null | undefined): Size;
/**
 * Subscribes to viewport changes at the given breakpoint. The callback is invoked
 * when the viewport crosses the breakpoint. Returns an unsubscribe function.
 */
export declare function subscribeToBreakpoint(breakpoint: BreakpointName, callback: () => void): () => void;
/**
 * Subscribes to multiple breakpoints; callback runs when any of them is crossed.
 * Returns a single unsubscribe that removes all listeners.
 */
export declare function subscribeToBreakpoints(breakpoints: BreakpointName[], callback: () => void): () => void;