From 65c990d0290e79a58cccebe2f1d73f7f056b6d69 Mon Sep 17 00:00:00 2001
From: Grant Kinney <hi@grant.mk>
Date: Tue, 23 Jan 2024 12:06:06 -0600
Subject: [PATCH] Font Library: Prevent error when installing a system font
 twice

---
 .../global-styles/font-library-modal/context.js     | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/packages/edit-site/src/components/global-styles/font-library-modal/context.js b/packages/edit-site/src/components/global-styles/font-library-modal/context.js
index c5933ca46ec7b..864d703f260b4 100644
--- a/packages/edit-site/src/components/global-styles/font-library-modal/context.js
+++ b/packages/edit-site/src/components/global-styles/font-library-modal/context.js
@@ -286,10 +286,15 @@ function FontLibraryProvider( { children } ) {
 
 			// Use the sucessfully installed font faces
 			// As well as any font faces that were already installed (those will be activated)
-			fontFamilyToInstall.fontFace = [
-				...sucessfullyInstalledFontFaces,
-				...alreadyInstalledFontFaces,
-			];
+			if (
+				sucessfullyInstalledFontFaces?.length > 0 ||
+				alreadyInstalledFontFaces?.length > 0
+			) {
+				fontFamilyToInstall.fontFace = [
+					...sucessfullyInstalledFontFaces,
+					...alreadyInstalledFontFaces,
+				];
+			}
 
 			// Activate the font family (add the font family to the global styles).
 			activateCustomFontFamilies( [ fontFamilyToInstall ] );