webpack.config.js

const path = require("path");

module.exports = {
  context: __dirname,
  entry: "./frontend/littok.jsx",
  output: {
    path: path.resolve(__dirname, "app", "assets", "javascripts"),
    filename: "bundle.js",
  },
  resolve: {
    extensions: [".js", ".jsx", "*"],
  },
  module: {
    rules: [
      {
        test: /\.jsx?$/,
        exclude: /(node_modules)/,
        use: {
          loader: "babel-loader",
          query: {
            presets: [
              "@babel/env",
              "@babel/react",
              {
                plugins: ["@babel/plugin-proposal-class-properties"],
              },
            ],
          },
        },
      },
      {
        test: /\.css$/i,
        use: ["style-loader", "css-loader"],
      },
      {
        test: /\.(png|jpe?g|gif)$/i,
        use: [
          {
            loader: "file-loader",
            options: {
              name: "[name].[contenthash].[ext]",
              outputPath: "static/img",
              esModule: false, // <- here
            },
          },
        ],
      },
      {
        test: /\.svg$/,
        loader: "svg-inline-loader",
      },
    ],
  },
  devtool: "source-map",
};