/**
 * Call onMount() if it's inside a component lifecycle, if not, just call the function
 *
 * @param fn
 * @param sync if set to false, it will run in the nextTick() of Vue
 */
export declare function tryOnMount(fn: () => unknown): void;
/**
 * Call `onDestroy` if inside a component, otherwise do nothing
 */
export declare function tryOnDestroy(fn: () => void): void;