add offline-plugin

Author: mofelee

package.json

@@ -17,6 +17,7 @@
     "eslint-plugin-import": "1.12.0",
     "eslint-plugin-jsx-a11y": "2.2.2",
     "eslint-plugin-react": "6.3.0",
-    "lerna": "2.0.0-beta.30"
+    "lerna": "2.0.0-beta.30",
+    "offline-plugin": "^3.4.2"
   }
 }

packages/react-scripts/config/webpack.config.prod.js

@@ -16,6 +16,7 @@ var HtmlWebpackPlugin = require('html-webpack-plugin');
 var ExtractTextPlugin = require('extract-text-webpack-plugin');
 var ManifestPlugin = require('webpack-manifest-plugin');
 var InterpolateHtmlPlugin = require('react-dev-utils/InterpolateHtmlPlugin');
+var OfflinePlugin = require('offline-plugin');
 var url = require('url');
 var paths = require('./paths');
 var getClientEnvironment = require('./env');
@@ -259,7 +260,8 @@ module.exports = {
     // having to parse `index.html`.
     new ManifestPlugin({
       fileName: 'asset-manifest.json'
-    })
+    }),
+    new OfflinePlugin()
   ],
   // Some libraries import Node modules but don't use them in the browser.
   // Tell Webpack to provide empty mocks for them so importing them works.