const buildDist = function()

in Gulpfile.js [42:82]


const buildDist = function(opts) {
  const webpackOpts = {
    debug: opts.debug,
    module: {
      loaders: [
        {test: /\.js$/, loader: 'babel'}
      ],
    },
    output: {
      filename: opts.output,
      libraryTarget: 'umd',
      library: opts.library,
    },
    plugins: [
      new webpackStream.webpack.DefinePlugin({
        'process.env.NODE_ENV': JSON.stringify(
          opts.debug ? 'development' : 'production'
        ),
      })
    ]
  };
  if (!opts.debug) {
    webpackOpts.plugins.push(
      new webpackStream.webpack.optimize.UglifyJsPlugin({
        compress: {
          hoist_vars: true,
          screw_ie8: true,
          warnings: false
        }
      })
    );
  }
  return webpackStream(webpackOpts, null, function(err, stats) {
    if (err) {
      throw new gulpUtil.PluginError('webpack', err);
    }
    if (stats.compilation.errors.length) {
      gulpUtil.log('webpack', '\n' + stats.toString({colors: true}));
    }
  });
};