/**
 * get the datetime attribute, `datetime` are supported.
 * @param node
 * @returns {*}
 */
export declare function getDateAttribute(node: HTMLElement): string;
/**
 * set the node attribute, native DOM
 * @param node
 * @param timerId
 * @returns {*}
 */
export declare function setTimerId(node: HTMLElement, timerId: number): void;
/**
 * get the timer id
 * @param node
 */
export declare function getTimerId(node: HTMLElement): number;