interface UseMountTransition {
    /**
     * Allows for css transitions to be applied to components, while mounting or unmounting.
     * @param {Object} [props] Properties provided to the state
     *
     * `props.isMounted`: boolean - Whether the component has been mounted.
     * `props.unmountDelay`: number -  Number value of the length of the transition in ms.
     *
     * @returns {Boolean} `isTransitioning`
     */
    (isMounted: boolean, unmountDelay: number): boolean;
}
declare const useMountTransition: UseMountTransition;
export default useMountTransition;