seec-theme-example/webpack.config.js

module.exports = {
  module: {
    rules: [
      {
        test: /\.s(c|a)ss$/,
        use: [
          "vue-style-loader",
          "css-loader",
          {
            loader: "sass-loader",
            // Requires sass-loader@^7.0.0
            options: {
              implementation: require("sass"),
              indentedSyntax: true, // optional
            },
            // Requires sass-loader@^8.0.0
            options: {
              implementation: require("sass"),
              sassOptions: {
                indentedSyntax: true, // optional
              },
            },
          },
        ],
      },
    ],
  },
};