I use react-transition-group in my project. The whole project works well so far,but there is something confused me. The animation of the project dosen't work without TransitionGroup.
ReactDOM.render(
<TransitionGroup>
<CSSTransition
appear={true}
classNames="appAppear"
timeout={500}
>
<App/>
</CSSTransition>
</TransitionGroup>,
document.getElementById('root')
);
The document said 'The component manages a set of components in a list.' I still don't know why this hanppen. Can someone tell me ???