webpack.config.js

const path = require('path');

const HtmlWebpackPlugin = require('html-webpack-plugin');
const { CleanWebpackPlugin } = require('clean-webpack-plugin');
const CopyPlugin = require('copy-webpack-plugin');

const createStyledComponentsTransformer = require('typescript-plugin-styled-components')
  .default;
const styledComponentsTransformer = createStyledComponentsTransformer();

module.exports = {
  mode: 'production',
  entry: {
    'bundle.js': __dirname + '/src/index.tsx',
  },
  output: {
    path: path.join(__dirname, 'dist'),
    filename: 'bundle.min.js',
    publicPath: '/',
  },

  // Enable sourcemaps for debugging webpack's output.
  devtool: 'source-map',
  devServer: {
    port: 5000,
    historyApiFallback: true,
    publicPath: '/',
  },

  resolve: {
    // Add '.ts' and '.tsx' as resolvable extensions.
    extensions: ['.ts', '.tsx', '.js', '.jsx'],
    // we need this to reference files in the symlinked src/circuits directory
    symlinks: false,
  },

  module: {
    rules: [
      {
        test: /\.ts(x?)$/,
        exclude: [
          /node_modules/,
          /snarkjs.min.js/
        ],
        loader: 'ts-loader',
        options: {
          getCustomTransformers: () => ({
            before: [styledComponentsTransformer],
          }),
        },
      },
      {
        test: /\.css$/,
        use: ['style-loader', 'css-loader'],
      },
      {
        test: /\.(woff(2)?|ttf|eot|svg)(\?v=\d+\.\d+\.\d+)?$/,
        use: [
          {
            loader: 'file-loader',
            options: {
              name: '[name].[ext]',
              outputPath: 'fonts/'
            }
          }
        ]
      },
      {
        test: /snarkjs.min.js/,
        use: [
          {
            loader: 'file-loader',
          }
        ]
      },
      {
        test: /\.(js|jsx)$/,
        exclude: [
          /node_modules/,
          /snarkjs.min.js/
        ],
        use: {
          loader: "babel-loader",
          options: {
                presets: ["@babel/preset-env"]
          }
        }
      },
      // All output '.js' files will have any sourcemaps re-processed by 'source-map-loader'.
      {
        enforce: 'pre',
        test: /\.js$/,
        loader: 'source-map-loader',
      },
    ],
  },
  plugins: [
    new CleanWebpackPlugin(),
    new CopyPlugin({
      patterns: [
        { from: 'public', to: '' }
      ]
    }),
  ],

  // When importing a module whose path matches one of the following, just
  // assume a corresponding global variable exists and use that instead.
  // This is important because it allows us to avoid bundling all of our
  // dependencies, which allows browsers to cache those libraries between builds.
  externals: {
  },
};