1.安装依赖

npm install --save-dev node-sass
npm install sass-loader css-loader style-loader --save-dev

如果报错：卸载重新安装，如下命令

node-sass安装失败.png

npm uninstall node-sass
npm install node-sass@latest

再执行

npm install sass-loader css-loader style-loader --save-dev

2.webpack.config.js中配置

     {
        test: /\.scss$/,
        loaders: ["style", "css", "sass"]
      },

3.开始sass之旅

scoped:只有当前组件可用

<style lang="scss" scoped>
</style>

4.sass文件引入

<style lang="scss">
    @import './css/main.scss'
</style>