Library gives you the power of complex UI controls that have been developed at JetBrains over the years. It contains over 50 React controls, ranging from simple links and buttons to sophisticated controls, such as Date Picker or Data List.
https://blog.jetbrains.com/hub/2017/08/02/jetbrains-web-ui-components-open-sourced/
origin - http://www.pipiscrew.com/?p=9666 jetbrains-ring-ui-components-going-open-source