From d7bfae6bb7a3afc6e7f0db9d2a2a6f14b23b4f3b Mon Sep 17 00:00:00 2001
From: Tim Neutkens <tim@timneutkens.nl>
Date: Mon, 25 Jan 2021 18:28:15 +0100
Subject: [PATCH] Update api-utils.ts

---
 packages/next/next-server/server/api-utils.ts | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/packages/next/next-server/server/api-utils.ts b/packages/next/next-server/server/api-utils.ts
index a5f9430ab0776..6a1f3cea86e7b 100644
--- a/packages/next/next-server/server/api-utils.ts
+++ b/packages/next/next-server/server/api-utils.ts
@@ -364,6 +364,10 @@ export function tryGetPreviewData(
   }
 }
 
+function isNotValidData (str: string): boolean {
+  return typeof str !== 'string' || str.length < 16
+}
+
 function setPreviewData<T>(
   res: NextApiResponse<T>,
   data: object | string, // TODO: strict runtime type checking
@@ -371,10 +375,6 @@ function setPreviewData<T>(
     maxAge?: number
   } & __ApiPreviewProps
 ): NextApiResponse<T> {
-  const isNotValidData = (str: string): boolean => {
-    return typeof str !== 'string' || str.length < 16
-  }
-
   if (isNotValidData(options.previewModeId)) {
     throw new Error('invariant: invalid previewModeId')
   }