Babel is a toolchain that is mainly used to convert ECMAscr ipt 2015+ code into a backwards compatible version of Javascr ipt in current and older browsers or environments.
React 16的快速预览手册，全英文的，总结得很棒，值得学习State vs Props
Prop Types
Fragment
Events
Lifecycle events
Handling forms
Reference a doM element
Server side rendering
Context aPl
Higher-order components
Render Props
Hooks
Code splitting
Styling
Css in react
SASS Wit
