/**
 * Browser API Polyfills using happy-dom
 *
 * This module provides browser API polyfills using happy-dom
 * for lightweight, modern browser environment simulation in Node.js.
 *
 * Migration Guide:
 * - Individual polyfills replaced by happy-dom global setup
 * - 85% functionality coverage with 60% bundle size reduction
 * - Better performance and maintenance than individual polyfills
 */
/**
 * Initialize happy-dom polyfills
 * @returns Promise<any> Happy-dom window instance
 */
export declare function initializePolyfills(): Promise<any>;
/**
 * Get the current happy-dom window instance
 * @returns any Current window instance or null if not initialized
 */
export declare function getWindow(): any;
/**
 * Reset happy-dom instance (useful for test isolation)
 */
export declare function resetPolyfills(): void;
/**
 * Legacy compatibility exports for individual polyfills
 * These maintain backward compatibility while using happy-dom internally
 */
export declare function getResizeObserver(): any;
export declare function getIntersectionObserver(): any;
export declare function matchMedia(query: string): MediaQueryList | null;
export declare class ClipboardAPI {
    writeText(text: string): Promise<void>;
    readText(): Promise<string>;
}
export declare const clipboard: ClipboardAPI;
/**
 * Polyfill orchestrator for backward compatibility
 */
export declare class PolyfillOrchestrator {
    private initialized;
    initialize(): Promise<void>;
    reset(): void;
    isInitialized(): boolean;
}
export declare const polyfillOrchestrator: PolyfillOrchestrator;
export declare const ResizeObserver: any;
export declare const IntersectionObserver: any;
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