node 環境(vue 項目 引入mui.min.css 打包報錯

引用mui.min.csss,運行沒問題，打包就報錯，樣式明顯是沒引用mui.min.css的，所以百度找到了方法；
[1m[31mERROR in ./~/extract-text-webpack-plugin/loader.js?{"omit":1,"remove":true,"publicPath":"../../"}!./~/vue-style-loader!./~/css-loader?{"minimize":true,"sourceMap":false}!./~/vue-loader/lib/style-compiler?{"vue":true,"id":"data-v-f5406ef0","scoped":true,"hasInlineConfig":false}!./~/vue-loader/lib/selector.js?type=styles&index=0!./src/components/page/home.vue
Module build failed: ModuleBuildError: Module build failed: 
    at runLoaders (D:\job\HRBDMobileVue2\node_modules\webpack\lib\NormalModule.js:192:19)
    at D:\job\HRBDMobileVue2\node_modules\loader-runner\lib\LoaderRunner.js:364:11
    at D:\job\HRBDMobileVue2\node_modules\loader-runner\lib\LoaderRunner.js:230:18
    at context.callback (D:\job\HRBDMobileVue2\node_modules\loader-runner\lib\LoaderRunner.js:111:13)
    at Object.<anonymous> (D:\job\HRBDMobileVue2\node_modules\css-loader\lib\loader.js:50:18)
    at D:\job\HRBDMobileVue2\node_modules\css-loader\lib\processCss.js:234:4
    at <anonymous>
    at runMicrotasksCallback (internal/process/next_tick.js:121:5)
    at _combinedTickCallback (internal/process/next_tick.js:131:7)
    at process._tickCallback (internal/process/next_tick.js:180:9)[39m[22m

  Build failed with errors.

解決方法：

mui.min.css 中.mui-spinner:after中引入svg,將background-url 注掉ok了。