/**
 * @function applyFiltersToHtmlAndMediaElements
 * @description Reads the current `data-tone-appearance` and `data-tone-saturation`
 * attributes from the html element and applies the combined CSS filter
 * to the html element and media (img, video, canvas) elements.
 * This function should be called whenever either data attribute changes.
 */
export declare function applyFiltersToHtmlAndMediaElements(): void;