当设置材料用户界面组件时，Sass-Loader的模块构建失败

Question

，我的环境，，我有一个RoR应用程序安装与React。我使用rails服务器和webpack作为我的开发环境。

试图添加UI库--我将文档中所需的实质性ui文件添加到了ReactJS应用程序中。

在将资料UI档案加入我的根资料夹后，当执行我的应用程式时，请使用

编译时会出现以下错误：

根据此错误，解析-url-加载程序设置是不正确的。

WARNING in ./app/javascript/components/assets/scss/material-kit-react.scss (./node_modules/css-loader/dist/cjs.js??ref--7-1!./node_modules/postcss-loader/src??ref--7-2!./node_modules/resolve-url-loader??ref--7-3!./node_modules/sass-loader/lib/loader.js??ref--7-4!./app/javascript/components/assets/scss/material-kit-react.scss)
Module Warning (from ./node_modules/resolve-url-loader/index.js):
resolve-url-loader: loader misconfiguration
  "attempts" option is defunct (consider "join" option if search is needed)

错误作为多米诺效应来自不正确的解析-url-加载器设置，引用sass/scss不工作。

ERROR in ./app/javascript/components/assets/scss/plugins/_plugin-react-datetime.scss (./node_modules/css-loader/dist/cjs.js??ref--7-1!./node_modules/postcss-loader/src??ref--7-2!./node_modules/resolve-url-loader??ref--7-3!./node_modules/sass-loader/lib/loader.js??ref--7-4!./app/javascript/components/assets/scss/plugins/_plugin-react-datetime.scss)
Module build failed (from ./node_modules/sass-loader/lib/loader.js):

  border-color: $white-color !important;
               ^
      Undefined variable: "$white-color".
      in /home/ubuntu/workspace/backend/app/javascript/components/assets/scss/plugins/_plugin-react-datetime.scss (line 116, column 17)

我尝试将以下节点库添加到我的应用程序中

"devDependencies": {
    "css-loader": "^2.1.1",
    "mini-css-extract-plugin": "^0.6.0",
    "node-sass": "^4.11.0",
    "resolve-url-loader": "^3.1.0",
    "sass-loader": "^7.1.0",
    "style-loader": "^0.23.1",
    "webpack": "^4.30.0",
    "webpack-cli": "^3.3.0",
    "webpack-dev-server": "^3.2.1"
  }

在我的主根文件夹中创建和配置一个webpack.config.js

const path = require('path');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');

module.exports = {
  entry: './src/styles.scss',

  mode: 'development',

  module: {
    rules: [
      {
        test: /\.(png|jpg|gif)$/,
        include: [
          path.resolve(__dirname, './static/img'),
        ],
        use: {
          loader: 'file-loader',
          options: {
            name: '[name]-[hash].[ext]',
          },
        },
      },
      {
        test: /\.svg$/,
        use: {
          loader: 'svg-inline-loader',
          options: {
            name: '[name]-[hash].[ext]',
          },
        },
      },
      {test: /\/src\/js\/(?:.*)\.css$/, use: [{loader: 'style-loader'}, {loader: 'css-loader'}]},
      {
        test: [/\.scss$/, /\.sass$/],
        use: [
          MiniCssExtractPlugin.loader,
          {
            loader: 'css-loader',
            options: {
              sourceMap: true,
            },
          },
          {
            loader: 'resolve-url-loader',
            options: {
              debug: true,
              root: path.join(__dirname, './static/img'),
              includeRoot: true,
              absolute: true,
            },
          },
          {
            loader: 'sass-loader',
            options: {
              outputStyle: 'compressed',
              sourceMap: true,
              includePaths: [
                './app/javascript/components/assets/scss',
              ],
            },
          },
        ],
      },
    ],
  },

  output: {
    path: path.resolve(__dirname, 'dist'),
    publicPath: '/app/javascript/components/assets/scss',
  },

  plugins: [
    new MiniCssExtractPlugin({
      // Options similar to the same options in webpackOptions.output
      // both options are optional
      filename: '[name]-[chunkhash].css',
      chunkFilename: '[name]-[chunkhash].css', // Ensure each chunk has a unique id
    }),
  ],

  devtool: 'source-map'
};

向environment.js文件中添加sass加载程序

./config/webpack/environment.js

const { environment } = require('@rails/webpacker')

// resolve-url-loader must be used before sass-loader
environment.loaders.get('sass').use.splice(-1, 0, {
  loader: 'resolve-url-loader',
  options: {
    attempts: 1
  }
});

module.exports = environment

我也试过npm rebuild node-sass

经过我的尝试配置webpack和解析-url-加载器，我仍然无法使它工作。我已经阅读过他们各自的文档、其他问题和解决方案，但即使是解决-url-加载器自己的文档也说很难配置。

我希望能够在我的app文件夹中编译和处理scss/sass文件。

当前文件夹结构

./ (root folder)
  ./Webpack.config.js
  ./Config/webpack/environment
  ./App/javascript ( root folder react app)

如果你需要更多的信息，请问我

Answer 1

我有一个文件，在这个文件中，所有其他的scss都被导入，并且与其中一个文件连接。不幸的是，编译器没有考虑到这一点，并单独读取每个文件，说明丢失的文件，所以我不得不使用@import将丢失的文件添加到每个单独的scss文件中。草率的解决办法，但奏效了。

任何更好的答案都可以标记为我的答案。

Answer 2

Sidenote：@import将随着时间的推移逐步被淘汰，正如Sass 在这里输入链接描述中所说的那样。我也有兴趣在这里找到更好的解决办法。