/**
 * Shared HTML serialization utilities for Stencil components
 * Used by both matchers and snapshot serializers
 */
export interface SerializeOptions {
    /** Whether to include shadow DOM in serialization */
    serializeShadowRoot?: boolean;
    /** Whether to prettify the output */
    pretty?: boolean;
    /** Whether to exclude style tags */
    excludeStyles?: boolean;
}
/**
 * Serialize HTML element to string
 * Works across mock-doc, jsdom, and happy-dom environments
 * Uses consistent <mock:shadow-root> format across all environments
 */
export declare function serializeHtml(input: HTMLElement | ShadowRoot | DocumentFragment | string, options?: SerializeOptions): string;
/**
 * Custom HTML prettifier
 */
export declare function prettifyHtml(html: string): string;
/**
 * Normalize HTML for comparison by removing extra whitespace
 */
export declare function normalizeHtml(html: string): string;
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