How to use webpack

webpack(webpackConfig, function (err, stats) {
 spinner.stop()
 if (err) throw err
 process.stdout.write(stats.toString({
  colors: true,
  modules: false,
  children: false,
  chunks: false,
  chunkModules: false
 }) + '\n')
})

// force page reload when html-webpack-plugin template changes
compiler.plugin('compilation', function (compilation) {
 compilation.plugin('html-webpack-plugin-after-emit', function (data, cb) {
  hotMiddleware.publish({ action: 'reload' })
  cb()
 })
})

// only apply babel for test files when using isparta
webpackConfig.module.loaders.some(function (loader, i) {
 if (loader.loader === 'babel') {
  loader.include = /test\/unit/
  return true
 }
})

(function initWebpack() {
 var webpack = require('webpack');
 var webpackConfig = require('./webpack.config');
 var compiler = webpack(webpackConfig);

 app.use(require('webpack-dev-middleware')(compiler, {
  noInfo: true, publicPath: webpackConfig.output.publicPath
 }));

 app.use(require('webpack-hot-middleware')(compiler, {
  log: console.log, path: '/__webpack_hmr', heartbeat: 10 * 1000
 }));
})();

console.log('Creating an optimized production build...');
const compiler = webpack(config);
return new Promise((resolve, reject) => {
 compiler.run((err, stats) => {
   return reject(err);
  const messages = formatWebpackMessages(stats.toJson({}, true));
  if (messages.errors.length) {
   return reject(new Error(messages.errors.join('\n\n')));

const compiler = webpack(config);
return new Promise((resolve, reject) => {
 compiler.run((err, stats) => {
  } else {
   messages = formatWebpackMessages(
    stats.toJson({ all: false, warnings: true, errors: true })
   );

new webpack.DefinePlugin(env.stringified),
isEnvDevelopment && new webpack.HotModuleReplacementPlugin(),
new webpack.IgnorePlugin(/^\.\/locale$/, /moment$/),

const compiler = webpack(config);
return new Promise((resolve, reject) => {
  compiler.run((err, stats) => {
    } else {
      messages = formatWebpackMessages(
        stats.toJson({ all: false, warnings: true, errors: true })
      );

new webpack.DefinePlugin(env.stringified),
isEnvDevelopment && new webpack.HotModuleReplacementPlugin(),
new webpack.IgnorePlugin(/^\.\/locale$/, /moment$/),

new webpack.DefinePlugin(env.stringified),
isEnvDevelopment && new webpack.HotModuleReplacementPlugin(),
new webpack.IgnorePlugin(/^\.\/locale$/, /moment$/),

const compiler = webpack(config);
return new Promise((resolve, reject) => {
 compiler.run((err, stats) => {
  } else {
   messages = formatWebpackMessages(
    stats.toJson({ all: false, warnings: true, errors: true })
   );

const compiler = webpack(config);
return new Promise((resolve, reject) => {
  compiler.run((err, stats) => {
    } else {
      messages = formatWebpackMessages(
        stats.toJson({ all: false, warnings: true, errors: true })
      );

new webpack.DefinePlugin(env.stringified),
isEnvDevelopment && new webpack.HotModuleReplacementPlugin(),
new webpack.IgnorePlugin(/^\.\/locale$/, /moment$/),

new webpack.DefinePlugin(env.stringified),
isEnvDevelopment && new webpack.HotModuleReplacementPlugin(),
new webpack.IgnorePlugin(/^\.\/locale$/, /moment$/),

new webpack.DefinePlugin(env.stringified),
isEnvDevelopment && new webpack.HotModuleReplacementPlugin(),
new webpack.IgnorePlugin(/^\.\/locale$/, /moment$/),