用vue-cli 搭建框架的时候，style 用sass或scss 编译器时，会报如下的错误，
* !!vue-style-loader!css-loader?{"sourceMap":true}!../../../node_modules/vue-loader/lib/style-compiler/index?{"vue":true,"id":"data-v-96f3ab80","scoped":true,"hasInlineConfig":false}!sass-loader?{"sourceMap":true}!../../../node_modules/vue-loader/lib/selector?type=styles&index=0!./index.vue in ./src/components/m-header/index.vue
To install it, you can run: npm install --save !!vue-style-loader!css-loader?{"sourceMap":true}!../../../node_modules/vue-loader/lib/style-compiler/index?{"vue":true,"id":"data-v-96f3ab80","scoped":true,"hasInlineConfig":false}!sass-loader?{"sourceMap":true}!../../../node_modules/vue-loader/lib/selector?type=styles&index=0!./index.vue
不要担心，安装两个npm 包就解决问题了
npm install --save sass-loader
npm install --save node-sass
就解决问题了！