Eek out some file size

createWebpackConfig.js

@@ -4,6 +4,7 @@ var webpack = require('webpack');
 module.exports = function createWebpackConfig(_options) {
   var config;
   var options = _options || {};
+  var env = options.env || 'development';
 
   config = {
     context: options.context,
@@ -11,8 +12,17 @@ module.exports = function createWebpackConfig(_options) {
 
     plugins: [
       new webpack.optimize.OccurrenceOrderPlugin(),
+      new webpack.DefinePlugin({
+        'process.env': {
+          NODE_ENV: JSON.stringify(env),
+        },
+      }),
     ],
 
+    node: {
+      process: false,
+    },
+
     module: {
       loaders: [
         { test: /\.js$/, loaders: ['babel-loader'], exclude: /node_modules/ },
@@ -35,6 +45,9 @@ module.exports = function createWebpackConfig(_options) {
     config.plugins.push(
       new webpack.optimize.UglifyJsPlugin({
         compressor: {
+          pure_getters: true,
+          unsafe: true,
+          unsafe_comps: true,
           screw_ie8: true,
           warnings: false,
         },
@@ -42,15 +55,5 @@ module.exports = function createWebpackConfig(_options) {
     );
   }
 
-  if (options.env) {
-    config.plugins.push(
-      new webpack.DefinePlugin({
-        'process.env': {
-          NODE_ENV: JSON.stringify(options.env),
-        },
-      })
-    );
-  }
-
   return config;
 };

test/freeze-spec.js

@@ -43,13 +43,15 @@ describe('u.freeze', () => {
     expect(Object.isFrozen(object.foo)).to.be.false;
   });
 
-  it('does not freeze in production', () => {
+  if (typeof process !== 'undefined') {
-    process.env.NODE_ENV = 'production';
+    it('does not freeze in production', () => {
-    const object = {};
+      process.env.NODE_ENV = 'production';
-    u.freeze(object);
+      const object = {};
+      u.freeze(object);
 
-    expect(Object.isFrozen(object)).to.be.false;
+      expect(Object.isFrozen(object)).to.be.false;
-  });
+    });
+  }
 
   it('handles null objects', () => {
     const object = { foo: null };