import type { FocusHighlight } from './focusRegionMap.js';
/**
 * Writes the map's highlights onto the canvas and clears those that left it,
 * returning the IDs to pass back as `previous`. Only classes, properties and
 * attributes are written: inserting an element can make the browser scroll.
 */
export declare function applyFocusHighlights(doc: Document, focusMap: Map<string, FocusHighlight>, previous: ReadonlySet<string>): Set<string>;