webpack.common.js

const webpack = require("webpack");
const path = require("path");
const CopyWebpackPlugin = require("copy-webpack-plugin");
const MiniCssExtractPlugin = require("mini-css-extract-plugin");
const AssetsPlugin = require("assets-webpack-plugin");
const HtmlWebpackPlugin = require("html-webpack-plugin");

module.exports = {
  entry: {
    main: path.join(__dirname, "src", "index.js"),
    cms: path.join(__dirname, "src", "js", "cms.js"),
  },

  output: {
    path: path.join(__dirname, "dist"),
    publicPath: ""
  },

  module: {
    rules: [
      {
        test: /\.((png)|(eot)|(woff)|(woff2)|(ttf)|(svg)|(gif))(\?v=\d+\.\d+\.\d+)?$/,
        loader: "file-loader",
        options: {
          name: "name=/[fullhash].[ext]"
        }
      },
      {
        loader: "babel-loader",
        test: /\.js?$/,
        exclude: /node_modules/,
        options: {
          cacheDirectory: true,
          presets: ['@babel/preset-env','@babel/preset-react']
        }
      },
      {
        test: /\.(sa|sc|c)ss$/,
        exclude: /node_modules/,
        use: [
          "style-loader", 
          {
            loader: MiniCssExtractPlugin.loader,
            options: {
              esModule: false
            }
          }, 
          "css-loader",
          "postcss-loader",
          "sass-loader"
        ]
      }
    ]
  },

  plugins: [
    new AssetsPlugin({
      filename: "webpack.json",
      path: path.join(process.cwd(), "site/data"),
      prettyPrint: true
    }),
    new CopyWebpackPlugin({
      patterns: [{
        from: "./src/fonts/",
        to: "fonts/",
      }]
    }),
    new HtmlWebpackPlugin({
      filename: "admin/index.html",
      template: 'src/cms.html',
      inject: false,
    })
  ],

  resolve: {
    fallback: {
      path: require.resolve('path-browserify'),
      stream: require.resolve('stream-browserify'),
      buffer: require.resolve('buffer/'),
    },
  },
};