Disable comparisons feature in uglify compression in production (#2379)

* Disable a micro-option in uglify that appears to be buggy See #2376 * wrong plugin * Add a comment
facebook · May 27, 2017 · f6d8544 · f6d8544
1 parent c1ba38d
commit f6d8544
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/packages/react-scripts/config/webpack.config.prod.js b/packages/react-scripts/config/webpack.config.prod.js
@@ -282,6 +282,11 @@ module.exports = {
     new webpack.optimize.UglifyJsPlugin({
       compress: {
         warnings: false,
+        // Disabled because of an issue with Uglify breaking seemingly valid code:
+        // https://github.com/facebookincubator/create-react-app/issues/2376
+        // Pending further investigation:
+        // https://github.com/mishoo/UglifyJS2/issues/2011
+        comparisons: false,
       },
       output: {
         comments: false,