WebStorm has a convenient built-in terminal which you can launch with a simple keyboard shortcut and customize to your heart's content. This video shows how to set up the terminal to launch Cygwin (a very popular Windows shell alternative), but the concepts hold true for launching zsh, fish, or any shell of your choice.
In React 0.14+, you can write stateless components as pure functions called "stateless function[al] components"; in well designed apps, these "pure" components should be the majority of your application and can be tied together by a few "smart" wrapper components that control your state and pass down needed data to the pure components. In this lesson, we walk through the syntax of stateless function components, converting to them from stateless classes, and best practices in using them with stateful (aka "smart") components.
This lesson assumes use of ES6 and JSX.