/**
 * Element stability detection.
 * Checks if an element's position and size are stable across animation frames.
 * Based on Playwright's stability checking implementation.
 */
export interface StabilityOptions {
    /** Number of RAF frames to check stability across. Default: 2 */
    frameCount?: number;
    /** Timeout in milliseconds. Default: 5000 */
    timeout?: number;
}
export interface StabilityResult {
    stable: boolean;
    reason?: 'disconnected' | 'moving' | 'resizing' | 'timeout';
}
/**
 * Check if element position/size is stable across animation frames.
 * Uses requestAnimationFrame to compare bounding rects.
 *
 * @param element The element to check stability for
 * @param options Stability check options
 * @returns Promise resolving to stability result
 */
export declare function checkElementStability(element: Element, options?: StabilityOptions): Promise<StabilityResult>;
/**
 * Wait for element to become stable or timeout.
 * This is an alias for checkElementStability for API consistency.
 *
 * @param element The element to wait for stability
 * @param options Stability check options
 * @returns Promise resolving to stability result
 */
export declare function waitForElementStable(element: Element, options?: StabilityOptions): Promise<StabilityResult>;
/**
 * Check if an element is currently stable (synchronous snapshot check).
 * This only checks the current state and cannot detect movement.
 * For true stability detection, use checkElementStability.
 *
 * @param element The element to check
 * @returns Whether the element is connected and has valid dimensions
 */
export declare function isElementStableSync(element: Element): boolean;
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