Do not merge chunkGroups' CSS files (#51103)

This is a temporary fix before we can ship #51018 (more details there). If there're multiple chunk groups holding the same CSS module, we use files from the first one. This has some flaws but still better than our current status.
vercel · Jun 11, 2023 · 38d789f · 38d789f
1 parent 6ba6762
commit 38d789f
Showing 1 changed file with 0 additions and 7 deletions.
diff --git a/packages/next/src/build/webpack/plugins/flight-manifest-plugin.ts b/packages/next/src/build/webpack/plugins/flight-manifest-plugin.ts
@@ -219,13 +219,6 @@ export class ClientReferenceManifestPlugin {
               name: 'default',
               chunks: chunkCSS,
             }
-          } else {
-            // It is possible that there are multiple modules with the same resource,
-            // e.g. extracted by mini-css-extract-plugin. In that case we need to
-            // merge the chunks.
-            moduleReferences[exportName].chunks = [
-              ...new Set([...moduleReferences[exportName].chunks, ...chunkCSS]),
-            ]
           }
 
           return