From 81816cfa2ca89264b6a804bcfc0b3997adbb027b Mon Sep 17 00:00:00 2001
From: Alf Eaton <alf.eaton@overleaf.com>
Date: Thu, 19 May 2022 13:44:09 +0100
Subject: [PATCH] Merge pull request #8028 from overleaf/ae-css-minimizer

Disable cssnano mergeLonghand optimisation in production webpack config

GitOrigin-RevId: cfd19ae5bdbcb86a9c97035b230f5f03f5c7aad0
---
 services/web/webpack.config.prod.js | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/services/web/webpack.config.prod.js b/services/web/webpack.config.prod.js
index fd891ef961..54be47b889 100644
--- a/services/web/webpack.config.prod.js
+++ b/services/web/webpack.config.prod.js
@@ -22,7 +22,12 @@ module.exports = merge(
             keep_fnames: /(Error|Exception)$/,
           },
         }),
-        new CssMinimizerPlugin(),
+        new CssMinimizerPlugin({
+          minimizerOptions: {
+            // disable mergeLonghand to avoid a cssnano bug https://github.com/cssnano/cssnano/issues/864
+            preset: ['default', { mergeLonghand: false }],
+          },
+        }),
       ],
     },