Revert "Do not merge chunkGroups' CSS files (#51103)"

This reverts commit 38d789f.
vercel · Jun 12, 2023 · b88df23 · b88df23
1 parent d106155
commit b88df23
Showing 1 changed file with 7 additions and 0 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
@@ -219,6 +219,13 @@ 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