npm命令
//安裝
npm install --save-dev sass-loader
npm install --save-dev node-sass
//卸載
npm uninstall --save-dev sass-loader
npm uninstall --save-dev node-sass
yarn命令
yarn add sass-loader --dev
yarn add node-sass --dev
//一起安裝
yarn add sass-loader node-sass --dev
//卸載
yarn remove sass-loader --dev
yarn remove node-sass --dev
