webpack.config.js

const path = require('path');
const fs = require('fs');
const webpack = require('webpack');
const ExtractTextPlugin = require('extract-text-webpack-plugin');
// const CheckerPlugin = require('awesome-typescript-loader').CheckerPlugin;
const merge = require('webpack-merge');
const bundleOutputDir = './wwwroot/dist';
const appDirectory = fs.realpathSync(process.cwd());
const resolveApp = relativePath => path.resolve(appDirectory, relativePath);
module.exports = (env) => {
  const isDevBuild = !(env && env.prod);
  // Configuration in common to both client-side and server-side bundles
  const sharedConfig = () => ({
    stats: { modules: false },
    resolve: { extensions: ['.js', '.jsx'] },
    output: {
      path: path.join(__dirname, bundleOutputDir),
      filename: '[name].js',
      publicPath: 'dist/'
    },
    module: {
      rules: [
        {
          exclude: [
            /\.html$/,
            /\.(js|jsx)$/,
            /\.css$/,
            /\.json$/,
            /\.bmp$/,
            /\.gif$/,
            /\.jpe?g$/,
            /\.png$/,
            /\.scss$/
          ],
          loader: require.resolve('file-loader'),
          options: {
            name: 'static/media/[name].[hash:8].[ext]'
          }
        },
        {
          test: [
            /\.bmp$/, /\.gif$/, /\.jpe?g$/, /\.png$/
          ],
          loader: require.resolve('url-loader'),
          options: {
            limit: 10000,
            name: 'static/media/[name].[hash:8].[ext]'
          }
        },
        {
          test: /\.(js|jsx)$/,
          include : resolveApp('ClientApp'),
          loader: require.resolve('babel-loader'),
          options: {
            cacheDirectory: true
          }
        },
        {
          test: /\.css$/,
          use: isDevBuild? [
            require.resolve('style-loader'),
            {
              loader: require.resolve('css-loader')
            }
          ]:
            ExtractTextPlugin.extract({use:'css-loader?minimize'})
        },
      ]
    },
    plugins: []
  });

  // Configuration for client-side bundle suitable for running in browsers
  const clientBundleOutputDir = './wwwroot/dist';
  const clientBundleConfig = merge(sharedConfig(), {
    entry: { 'main-client': './ClientApp/boot-client.js' },
    output: { path: path.join(__dirname, clientBundleOutputDir) },
    plugins: [
      new ExtractTextPlugin('site.css'),
      new webpack.DllReferencePlugin({
        context: __dirname,
        manifest: require('./wwwroot/dist/vendor-manifest.json')
      })
    ].concat(isDevBuild ? [
      // Plugins that apply in development builds only
      new webpack.SourceMapDevToolPlugin({
        filename: '[file].map', // Remove this line if you prefer inline source maps
        moduleFilenameTemplate: path.relative(clientBundleOutputDir, '[resourcePath]') // Point sourcemap entries to the original file locations on disk
      })
    ] : [
      // Plugins that apply in production builds only
      new webpack.optimize.UglifyJsPlugin()
    ])
  });

  // Configuration for server-side (prerendering) bundle suitable for running in Node
  const serverBundleConfig = merge(sharedConfig(), {
    resolve: { mainFields: ['main'] },
    entry: { 'main-server': './ClientApp/boot-server.js' },
    plugins: [
      new webpack.DllReferencePlugin({
        context: __dirname,
        manifest: require('./ClientApp/dist/vendor-manifest.json'),
        sourceType: 'commonjs2',
        name: './vendor'
      })
    ],
    output: {
      libraryTarget: 'commonjs',
      path: path.join(__dirname, './ClientApp/dist')
    },
    target: 'node',
    devtool: 'inline-source-map'
  });

  return [clientBundleConfig, serverBundleConfig];
};