项目构建
一，创建项目
npx create-react-app my-app
npm init react-app my-app
yarn create react-app my-app
二，项目运行
npm start 或 yarn start
npm test 或 yarn test
npm run build 或 yarn build
三，安装依赖
1.Sass:
安装：npm install node-sass --save或者yarn add node-sass
引入：@import 'styles/_colors.scss'
2.react-router-dom
安装：npm install --save react-router-dom或者yarn add react-router-dom
3.TypeScript
安装：npm install --save typescript @types/node @types/react @types/react-dom @types/jest
...........或者yarn add typescript @types/node @types/react @types/react-dom @types/jest
启动：$ npx create-react-app my-app --typescript或者yarn create react-app my-app --typescript
4.Relay（宏任务）
安装：npm install --save babel-plugin-relay@dev或者yarn upgrade babel-plugin-relay@dev
导入使用：
import graphql from 'babel-plugin-relay/macro';
// instead of:
// import { graphql } from "babel-plugin-relay"
graphql`
query UserQuery {
viewer {
id
}
}
`;
