diff --git a/webpack.config.js b/webpack.config.js
index 026ea956d21..79c3be801c4 100644
--- a/webpack.config.js
+++ b/webpack.config.js
@@ -157,6 +157,68 @@ function lorisModule(mname, entries, override=false) {
   };
 }
 
+let mode = 'production';
+try {
+  const configFile = fs.readFileSync('project/config.xml', 'latin1');
+  const res = /<[\s]*?sandbox[\s]*?>(.*)<\/[\s]*?sandbox[\s]*?>/
+              .exec(configFile);
+  if (res && parseInt(res[1]) == 1) mode = 'development';
+} catch (error) {
+  console.error(
+    'Error - Can\'t read config.xml file. '
+    + 'Webpack mode set to production.'
+  );
+}
+
+const plugins = [
+  new CopyPlugin({
+    patterns: [
+      {
+        from: path.resolve(__dirname, 'node_modules/react/umd'),
+        to: path.resolve(__dirname, 'htdocs/vendor/js/react'),
+        flatten: true,
+        force: true,
+        globOptions: {
+          ignore: ['react.profiling.min.js'],
+        },
+        filter: async (path) => {
+          const file = path.split('\\').pop().split('/').pop();
+          const keep = [
+            'react.development.js',
+            'react.production.min.js',
+          ];
+          return keep.includes(file);
+        },
+      },
+      {
+        from: path.resolve(__dirname, 'node_modules/react-dom/umd'),
+        to: path.resolve(__dirname, 'htdocs/vendor/js/react'),
+        flatten: true,
+        force: true,
+        filter: async (path) => {
+          const file = path.split('\\').pop().split('/').pop();
+          const keep = [
+            'react-dom.development.js',
+            'react-dom.production.min.js',
+          ];
+          return keep.includes(file);
+        },
+      },
+    ],
+  }),
+];
+
+mode == 'development' && plugins.push(new ESLintPlugin({
+  files: [
+    'modules/',
+    'jsx/',
+    'jslib/',
+    'htdocs/js/',
+    'webpack.config.js',
+  ],
+  cache: true,
+}));
+
 let config = [
   // Core components
   {
@@ -227,6 +289,7 @@ let config = [
         ],
       }),
     ],
+    plugins: plugins,
     optimization: optimization,
     resolve: resolve,
     module: mod,