Simple and light wrapper component for sliding (to auto height) and fading animation when children mounts and unmount:

• Animate - provides sliding and fading animation for single component when mount & umount
• AnimateGroup - provides animation for items entering & leaving a list.

$ yarn add react-animate-mount

• https://mingruizhang.github.io/react-animate-mount/
• https://codesandbox.io/s/303lzkow5
• https://codesandbox.io/s/zrwyk6l933

Help animate single component when mount & umount

/** Before **/
this.state.show ? {childen} : null;

/** After **/
import { Animate } from 'react-animate-mount'

<Animate show={this.state.show}>
  {childen}
</Animate>

Wraps around a list of item, this provides <Animate> effect to each individual child. As item changes in the list, <AnimateGroup> will animate out removed children and animate in new children correctly.

Please provide unique key to each child. keys are used to identify child between renders

import { AnimateGroup } from 'react-animate-mount'

<AnimateGroup>
  {items.map(item => (<Item key={item.key} data={item.data} />)}
</AnimateGroup>