From 9ab5c012bffd9ca410978577d38b9a7a8e8db6d6 Mon Sep 17 00:00:00 2001
From: rubytree33 <110690041+rubytree33@users.noreply.github.com>
Date: Thu, 8 Sep 2022 19:35:33 -0700
Subject: [PATCH] Stop build warning about `experimental: { esmExternals:
 'loose' }` (#40377)

Fixes #40368.

## Bug

- [x] Related issues linked using `fixes #number`
- [ ] ~~Integration tests added~~ [none applicable]
- [ ] ~~Errors have helpful link attached, see `contributing.md`~~ [no new errors]
---
 packages/next/server/config-schema.ts | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/packages/next/server/config-schema.ts b/packages/next/server/config-schema.ts
index 984d0df6b77d75e..6c06e28a48b3980 100644
--- a/packages/next/server/config-schema.ts
+++ b/packages/next/server/config-schema.ts
@@ -253,7 +253,14 @@ const configSchema = {
           type: 'boolean',
         },
         esmExternals: {
-          type: 'boolean',
+          oneOf: [
+            {
+              type: 'boolean',
+            },
+            {
+              const: 'loose',
+            },
+          ] as any,
         },
         externalDir: {
           type: 'boolean',