import { Breakpoint, BreakpointConfig } from './types.js';
declare class ScreenSizeServiceImpl {
    private _listeners;
    private _currentBreakpoint;
    private _width;
    private _breakpoints;
    constructor(breakpoints?: BreakpointConfig);
    /** Current breakpoint name */
    get breakpoint(): Breakpoint;
    /** Current viewport width in pixels */
    get width(): number;
    /** True if viewport is extra small or small (< 768px) */
    get isMobile(): boolean;
    /** True if viewport is medium (768px - 1023px) */
    get isTablet(): boolean;
    /** True if viewport is large or extra large (>= 1024px) */
    get isDesktop(): boolean;
    /** Breakpoint order for fallback resolution */
    get breakpointOrder(): readonly Breakpoint[];
    /**
     * Subscribe to breakpoint changes.
     * Callback is called when the breakpoint changes (not on every resize).
     *
     * @param callback - Function to call when breakpoint changes
     * @returns Unsubscribe function
     */
    subscribe(callback: () => void): () => void;
    /**
     * Check if the current breakpoint matches the given breakpoint.
     */
    is(breakpoint: Breakpoint): boolean;
    /**
     * Check if the current breakpoint is at least the given breakpoint.
     * E.g., isAtLeast('md') returns true for md, lg, xl.
     */
    isAtLeast(breakpoint: Breakpoint): boolean;
    /**
     * Check if the current breakpoint is at most the given breakpoint.
     * E.g., isAtMost('md') returns true for xs, sm, md.
     */
    isAtMost(breakpoint: Breakpoint): boolean;
    private _handleResize;
    private _updateSize;
    private _notifyListeners;
}
/** Singleton instance of the screen size service */
export declare const screenSizeService: ScreenSizeServiceImpl;
export {};
//# sourceMappingURL=ScreenSizeService.d.ts.map