Provides more powerful externals configuration options.

new ExternalsPlugin({ type, test, include, exclude }), where:

• type represents the type of external (/var|this|commonjs2?|amd|umd/). Defaults to options.output.libraryTarget.
• test, include, exclude work as they do with loader configuration.

The following webpack configuration considers all modules under the local node_modules/ directory as externals.

webpack.config.js:

var ExternalsPlugin = require('webpack-externals-plugin');
module.exports = {
  entry: './app.js',
  output: {
    path: __dirname + '/dist',
    filename: 'bundle.js',
  },
  plugins: [
    new ExternalsPlugin({
      type: 'commonjs',
      include: __dirname + '/node_modules',
    }),
  ],
};

Webpack externals are only filtered depending on the user request (require('webpack') => webpack).

With this plugin, externals are filtered depending on the path of the resolved module (require('webpack') => <dir_path>/node_modules/webpack/lib/webpack.js).

This lets you include or exclude entire directories depending on the actual path of the resolved module.