webpack ignore plugin ♥ George Opritescu

The ignore plugin was useful to reduce the size of moment.js. Found this answer, which gave this useful snippet:

new webpack.IgnorePlugin(/^\.\/locale$/, /moment$/) // Ignore all optional deps of moment.js

Couple that with the BundleAnalyzerPlugin ( config has to be done in webpack.config.js ) :

new BundleAnalyzerPlugin({
  reportFilename: 'report.html',
  // Automatically open report in default browser
  openAnalyzer: false,
  // If `true`, Webpack Stats JSON file will be generated in bundles output directory
  generateStatsFile: false,
  // Name of Webpack Stats JSON file that will be generated if `generateStatsFile` is `true`.
  // Relative to bundles output directory.
  statsFilename: 'stats.json',
  // Options for `stats.toJson()` method.
  // For example you can exclude sources of your modules from stats file with `source: false` option.
  // See more options here: https://github.com/webpack/webpack/blob/webpack-1/lib/Stats.js#L21
  statsOptions: null,
  // Log level. Can be 'info', 'warn', 'error' or 'silent'.
  logLevel: 'info'
}),

and you have a really nice way of seeing what causes your js file to be so big.