import "animate.css";
import ReactCSSTransitionGroup from "react-addons-css-transition-group";
<ReactCSSTransitionGroup
transitionEnter={true}
transitionLeave={true}
transitionEnterTimeout={2500}
transitionLeaveTimeout={1500}
transitionName="animated"
>
<div id="menu1Child" key="amache" className={`animated fadeInDown ${this.state.menu1 === true ? styles.menu1Child : styles.hidden}`}>