Cut react devtools forwarding by webpack in production build

frontend/iframe.html

@@ -109,14 +109,16 @@
     <div id="remark42">
       <div class="preloader preloader_view_iframe"></div>
     </div>
+    <% if (htmlWebpackPlugin.options.env === 'development') { %>
     <script>
-      /* REMOVE-START */
       if (window.parent !== window) {
         try {
           window.__REACT_DEVTOOLS_GLOBAL_HOOK__ = window.parent.__REACT_DEVTOOLS_GLOBAL_HOOK__;
         } catch (e) {}
       }
-      /* REMOVE-END */
+    </script>
+    <% } %>
+    <script>
       var lastHeight = 0;
       setInterval(function() {
         if (document.body.offsetHeight !== lastHeight && document.body.offsetHeight > 10) {

frontend/webpack.config.js

@@ -168,6 +168,12 @@ module.exports = () => ({
       'process.env.REMARK_NODE': JSON.stringify(NODE_ID),
       'process.env.REMARK_URL': env === 'production' ? JSON.stringify(remarkUrl) : 'window.location.origin',
     }),
+    new Html({
+      template: path.resolve(__dirname, 'iframe.html'),
+      filename: 'iframe.html',
+      inject: false,
+      env,
+    }),
     new Html({
       template: path.resolve(__dirname, 'index.ejs'),
       inject: false,
@@ -203,7 +209,7 @@ module.exports = () => ({
             openAnalyzer: false,
           }),
         ]),
-    new Copy(['./iframe.html', './deleteme.html', './markdown-help.html']),
+    new Copy(['./deleteme.html', './markdown-help.html']),
   ],
   watchOptions: {
     ignored: /(node_modules|\.vendor\.js$)/,