From 0dcf2964252f65641a624211431fef85148855bb Mon Sep 17 00:00:00 2001
From: acalcutt <acalcutt@techidiots.net>
Date: Sat, 4 Jan 2025 11:23:35 -0500
Subject: [PATCH] Update serve_font.js

---
 src/serve_font.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/serve_font.js b/src/serve_font.js
index 7c38300..4403553 100644
--- a/src/serve_font.js
+++ b/src/serve_font.js
@@ -35,7 +35,7 @@ export async function serve_font(options, allowedFonts, programOpts) {
     const sanitizedFontStack = fontStackParts
       .map((font) => {
         const fontMatch = font?.match(/^[\w\s-]+$/);
-        return fontMatch?.[0];
+        return fontMatch?.[0] || 'invalid';
       })
       .filter(Boolean)
       .join(',');