update

webpack.config.ts

@@ -1,7 +1,10 @@
 import { Configuration } from 'webpack';
 import HtmlWebpackPlugin from 'html-webpack-plugin';
+import SriPlugin from 'webpack-subresource-integrity';
 import path from 'path';
 
+const OfflinePlugin = require('offline-plugin');
+
 const __DEV__ = process.env.NODE_ENV !== 'production';
 
 const config: Configuration = {
@@ -14,6 +17,7 @@ const config: Configuration = {
   },
   output: {
     path: path.join(__dirname, 'dist'),
+    crossOriginLoading: 'anonymous',
   },
   resolve: {
     extensions: ['.tsx', '.ts', '.js'],
@@ -21,10 +25,21 @@ const config: Configuration = {
       'react-dom': '@hot-loader/react-dom',
     },
   },
+  optimization: {
+    usedExports: true,
+  },
   plugins: [
+    new SriPlugin({
+      hashFuncNames: ['sha256', 'sha384'],
+      enabled: !__DEV__,
+    }),
     new HtmlWebpackPlugin({
       title: 'Parcel',
       minify: true,
+      template: path.join(__dirname, 'html.html'),
+    }),
+    new OfflinePlugin({
+      events: true,
     }),
   ],
   module: {