1、npm install node-sass --save-dev
2、npm install sass-loader --save-dev
npm i less-loader --save-dev
1、npm install node-sass --save-dev
2、npm install sass-loader --save-dev
npm i less-loader --save-dev
https://www.bilibili.com/video/BV1k8411575T/?vd_source=d68ed178f151e80fea1e02efd205802c