webpack.config.js

'use strict';

const webpack = require('webpack');
const path = require('path');
const ClosurePlugin = require('closure-webpack-plugin');

module.exports = (env) => {
  const isProduction = env === 'production';
  const compilerFlags = isProduction
    ? {
      angular_pass: true,
      compilation_level: 'WHITESPACE_ONLY',
      warning_level: 'QUIET'
    }
    : {
      formatting: 'PRETTY_PRINT',
      angular_pass: true,
      debug: true
    };

  return {
    entry: {
      app: './src/app.js',
    },
    output: {
      path: path.resolve(__dirname, 'public'),
      filename: 'app.js'
    },
    devServer: {
      contentBase: path.resolve(__dirname, 'public'),
    },
    module: {
      rules: [
        {
          test: /\.html$/,
          use: 'raw-loader',
          exclude: [/node_modules/]
        }
      ]
    },
    plugins: [
      new ClosurePlugin(
        {
          mode: isProduction ? 'STANDARD' : 'NONE',
          closureLibraryBase: require.resolve('google-closure-library/closure/goog/base'),
          deps: [
            require.resolve('google-closure-library/closure/goog/deps'),
            './public/deps.js',
          ],
        },
        compilerFlags
      )
    ]
  }
};