Run bundle analyzer only in dev

webpack.config.js

@@ -63,7 +63,6 @@ module.exports = (env, argv) => {
       // show a progress bar
       new WebpackBar(),
       // create a report.html for bundle size
-      new BundleAnalyzerPlugin({ analyzerMode: 'static', openAnalyzer: false }),
       // extract css to css files
       isEnvProduction &&
         new MiniCssExtractPlugin({
@@ -76,6 +75,11 @@ module.exports = (env, argv) => {
           cssProcessorOptions: {
             map: { inline: false, annotation: true }
           }
+        }),
+      isEnvDevelopment &&
+        new BundleAnalyzerPlugin({
+          analyzerMode: 'static',
+          openAnalyzer: false
         })
       // hot reload not working right now
       // isEnvDevelopment &&