I noticed this recently on the React docs site on mobile [0]. It's also used on Github mobile's view of repository for switching between Code, Issues, Pull Requ

I noticed this recently on the React docs site on mobile [0]. It's also used on Github mobile's view of repository for switching between Code, Issues, Pull Requests, etc [1]. [0] https://reactjs.org/docs/getting-started.html https://reactjs.org/docs/getting-started.html [1] https://github.com/multiprocessio/datastation https://github.com/multiprocessio/datastation