import { NodePart, AttributePart, BooleanAttributePart, EventPart, PropertyPart } from "lit-html";
/** #################################################################################
 ** The purpose of this module is to provide an API to clean up the node parts cache.
 ** This is to avoid memory leaks from parts being added and removed to the template.
 ** This is necessary since lit-html currently do not provide a way of cleaning up after a directive.
 ** In the ideal world we would be able to cache the parts in a weakmap, however that makes
 ** us unable to loop over the map which is required for updating the translations when the lang changes.
 ** This module will be obsolete the day lit-html provides a way of cleaning up after a directive
 ** ##################################################################################

/**
 * Check whether the part is still connected / has been removed from the DOM.
 * @param part
 */
export declare function isConnected(part: NodePart | AttributePart | BooleanAttributePart | EventPart | PropertyPart): boolean;
/**
 * Removes the disconnected parts from the cache.
 */
export declare function removeDisconnectedParts(map: Map<NodePart, unknown>): void;
/**
 * Invokes a callback when the browser is idle.
 * Fallback to setTimeout.
 * @param cb
 */
export declare function whenIdle(cb: (() => void)): void;
/**
 * Starts an interval that cleans up the part cache map each X ms.
 * @param map
 * @param ms
 */
export declare function attachPartsGarbageCollector(map: Map<NodePart, unknown>, ms: number): void;