From d28a29f2c9005412b2e42a36fda4c7f6f5524dde Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?S=C3=A9bastien=20Lorber?= <slorber@users.noreply.github.com>
Date: Tue, 28 Jul 2020 20:17:47 +0200
Subject: [PATCH] fix(v2): BrowserOnly should not return undefined (#3149)

---
 packages/docusaurus/src/client/exports/BrowserOnly.tsx | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/packages/docusaurus/src/client/exports/BrowserOnly.tsx b/packages/docusaurus/src/client/exports/BrowserOnly.tsx
index b3492cfcc8bb..417c3cbb124e 100644
--- a/packages/docusaurus/src/client/exports/BrowserOnly.tsx
+++ b/packages/docusaurus/src/client/exports/BrowserOnly.tsx
@@ -14,9 +14,9 @@ function BrowserOnly({
 }: {
   children?: () => JSX.Element;
   fallback?: JSX.Element;
-}): JSX.Element | undefined {
+}): JSX.Element | null {
   if (!ExecutionEnvironment.canUseDOM || children == null) {
-    return fallback || undefined;
+    return fallback || null;
   }
 
   return <>{children()}</>;