Optimize webpack build with NODE_ENV and plugin

Remove branches where `process.env.NODE_ENV !== "production"`
especially for React.

Author: remarkablemark

package.json

@@ -5,8 +5,8 @@
   "author": "Mark <mark@remarkablemark.org>",
   "main": "index.js",
   "scripts": {
-    "build": "webpack index.js dist/html-to-react.js",
-    "build-min": "webpack -p index.js dist/html-to-react.min.js",
+    "build": "NODE_ENV=development webpack index.js dist/html-to-react.js",
+    "build-min": "NODE_ENV=production webpack -p index.js dist/html-to-react.min.js",
     "test": "mocha",
     "lint": "eslint index.js \"lib/**\" \"test/**\"",
     "cover": "istanbul cover _mocha -- -R spec \"test/**/*\"",

webpack.config.js

@@ -1,5 +1,10 @@
 'use strict';
 
+/**
+ * Module dependencies.
+ */
+var webpack = require('webpack');
+
 /**
  * Export webpack configuration.
  */
@@ -15,5 +20,11 @@ module.exports = {
             commonjs: 'react',
             amd: 'react'
         }
-    }
+    },
+    plugins: [
+        new webpack.optimize.OccurrenceOrderPlugin(),
+        new webpack.DefinePlugin({
+            'process.env.NODE_ENV': JSON.stringify(process.env.NODE_ENV)
+        })
+    ]
 };