/**
 * ResizeObserver mock for testing
 *
 * Provides a mock implementation of ResizeObserver
 * for testing responsive components.
 *
 * @example
 * ```typescript
 * // Setup mock before tests
 * setupResizeObserverMock();
 *
 * // Now ResizeObserver won't throw
 * const observer = new ResizeObserver(entries => {
 *   console.log('Resized:', entries);
 * });
 * observer.observe(element);
 *
 * // Trigger resize callbacks manually
 * MockResizeObserver.triggerAll([{ width: 100, height: 200 }]);
 * ```
 */
type ResizeObserverCallback = (entries: ResizeObserverEntry[], observer: ResizeObserver) => void;
/**
 * Mock ResizeObserver class
 */
export declare class MockResizeObserver implements ResizeObserver {
    private callback;
    private observedElements;
    /** All active MockResizeObserver instances */
    static instances: MockResizeObserver[];
    constructor(callback: ResizeObserverCallback);
    observe(target: Element): void;
    unobserve(target: Element): void;
    disconnect(): void;
    /**
     * Get observed elements
     */
    getObservedElements(): Element[];
    /**
     * Manually trigger the callback with mock entries
     */
    trigger(entries: Array<{
        width?: number;
        height?: number;
        target?: Element;
    }>): void;
    /**
     * Trigger all active observers
     */
    static triggerAll(entries: Array<{
        width?: number;
        height?: number;
    }>): void;
    /**
     * Clear all instances
     */
    static clearInstances(): void;
}
/**
 * Sets up ResizeObserver mock on globalThis
 */
export declare function setupResizeObserverMock(): void;
/**
 * Creates a standalone mock ResizeObserver (without global setup)
 */
export declare function createMockResizeObserver(callback: ResizeObserverCallback): MockResizeObserver;
export {};
//# sourceMappingURL=resizeObserver.d.ts.map