From 6b11e1744346f60504b727984f7d42f0fef3ab54 Mon Sep 17 00:00:00 2001
From: Huang Xin <chrox.huang@gmail.com>
Date: Sat, 29 Nov 2025 06:39:57 +0800
Subject: [PATCH] Properly handle empty fragments for MOBI (#107)

---
 mobi.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mobi.js b/mobi.js
index bbf6a1e..811b0d3 100644
--- a/mobi.js
+++ b/mobi.js
@@ -994,7 +994,7 @@ class KF8 {
             const last = arr[arr.length - 1]
             const fragStart = last?.fragEnd ?? 0, fragEnd = fragStart + skel.numFrag
             const frags = fragTable.slice(fragStart, fragEnd)
-            const length = skel.length + frags.map(f => f.length).reduce((a, b) => a + b)
+            const length = skel.length + frags.map(f => f.length).reduce((a, b) => a + b, 0)
             const totalLength = (last?.totalLength ?? 0) + length
             return arr.concat({ skel, frags, fragEnd, length, totalLength })
         }, [])