react-transition-group 
ATTENTION! To address many issues that have come up over the years, the API in v2 and above is not backwards compatible with the original <code>React addon (v1-stable)</code>.
For a drop-in replacement for
react-addons-transition-groupandreact-addons-css-transition-group, use the v1 release. Documentation and code for that release are available on the <code>v1-stable</code> branch.We are no longer updating the v1 codebase, please upgrade to the latest version when possible
A set of components for managing component states (including mounting and unmounting) over time, specifically designed with animation in mind.
Documentation
TypeScript
TypeScript definitions are published via <strong>DefinitelyTyped</strong> and can be installed via the following command:
npm install @types/react-transition-group
Examples
Clone the repo first:
git@github.com:reactjs/react-transition-group.git
Then run npm install (or yarn), and finally npm run storybook to start a storybook instance that you can navigate to in your browser to see the examples.