var webpack = require('webpack');

module.exports = {
  entry: "./src/app.js",
  output: {
    path: "./build",
    filename: "bundle.js",
    publicPath: 'http://localhost:8090/assets'
  },
  module: {
    loaders: [
      { test: /\.scss$/, loader: "style!css!sass" },
      { test: /\.css$/, loader: "style!css" },
      { test: /\.(png|jpg)$/, loader: 'url-loader?limit=8192' },
      { test: /\.js$/, loader: "jsx-loader?insertPragma=React.DOM&harmony" },
      { test: /\.json$/, loader: "json" }
    ]
  },
  externals: {
    'react': 'React'
  },
  resolve: {
    extensions: ['', '.js', '.jsx']
  },
  plugins: [
    // Ignore extra languages for moment.js
    new webpack.IgnorePlugin(/^\.\/locale$/, /moment$/)
  ]
};

module.exports = {
  entry: "./src/app.js",
  output: {
    path: "./build",
    filename: "bundle.js",
    publicPath: 'http://localhost:8090/assets'
  },
  module: {
    loaders: [
      { test: /\.scss$/, loader: "style!css!sass" },
      { test: /\.css$/, loader: "style!css" },
      { test: /\.(png|jpg)$/, loader: 'url-loader?limit=8192' },
      { test: /\.js$/, loader: "jsx-loader?insertPragma=React.DOM&harmony" },
      { test: /\.json$/, loader: "json" }
    ]
  },
  externals: {
    'react': 'React'
  },
  resolve: {
    extensions: ['', '.js', '.jsx']
  }
};

--- 
+++ 
@@ -1,3 +1,5 @@
+var webpack = require('webpack');
+
 module.exports = {
   entry: "./src/app.js",
   output: {
@@ -19,5 +21,9 @@
   },
   resolve: {
     extensions: ['', '.js', '.jsx']
-  }
+  },
+  plugins: [
+    // Ignore extra languages for moment.js
+    new webpack.IgnorePlugin(/^\.\/locale$/, /moment$/)
+  ]
 };
Add plugin to ignore moment.js language packs.
