I did have second thoughts initially about including this project on the site. It's just an animated dropdown menu I thought. However, in retrospect its a Facebook-style dropdown menu built in Facebook's React, and for that reason I thought it worth including. By clicking on the chevron on the right-hand-side, and then settings, we can see the animated menu in action. The menu automatically expands its height and width based on the number of components it contains.

All of the styling is done in vanila CSS.