From fe4b71132ea65d0cd66e0af8c7d92d67eb8d411b Mon Sep 17 00:00:00 2001
From: Sukka <isukkaw@gmail.com>
Date: Fri, 22 Jul 2022 01:53:41 +0800
Subject: [PATCH] fix: correct the next config optimizeCss type (#38879)

`experimental.optimizeCss` from `next.config.js` can be an object containing the critters' option:

https://github.com/vercel/next.js/blob/70a53e0789c7e361f12139db6e124a5bb1d2afd9/packages/next/server/post-process.ts#L224-L232

The PR corrects the ajv schema and the type definition of `experimental.optimizeCss`.
---
 packages/next/server/config-schema.ts | 9 ++++++++-
 packages/next/server/config-shared.ts | 5 ++++-
 2 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/packages/next/server/config-schema.ts b/packages/next/server/config-schema.ts
index f9d18748f444..841a57da63fa 100644
--- a/packages/next/server/config-schema.ts
+++ b/packages/next/server/config-schema.ts
@@ -333,7 +333,14 @@ const configSchema = {
           type: 'boolean',
         },
         optimizeCss: {
-          type: 'boolean',
+          oneOf: [
+            {
+              type: 'boolean',
+            },
+            {
+              type: 'object',
+            },
+          ] as any,
         },
         outputFileTracingRoot: {
           minLength: 1,
diff --git a/packages/next/server/config-shared.ts b/packages/next/server/config-shared.ts
index a1dbbb5110e0..ff38d8e304ca 100644
--- a/packages/next/server/config-shared.ts
+++ b/packages/next/server/config-shared.ts
@@ -94,7 +94,10 @@ export interface ExperimentalConfig {
   isrFlushToDisk?: boolean
   workerThreads?: boolean
   pageEnv?: boolean
-  optimizeCss?: boolean
+  // optimizeCss can be boolean or critters' option object
+  // Use Record<string, unknown> as critters doesn't export its Option type
+  // https://github.com/GoogleChromeLabs/critters/blob/a590c05f9197b656d2aeaae9369df2483c26b072/packages/critters/src/index.d.ts
+  optimizeCss?: boolean | Record<string, unknown>
   nextScriptWorkers?: boolean
   scrollRestoration?: boolean
   externalDir?: boolean