From f1d4a4290da881745e2b0b24df8a62dc9c88fbd1 Mon Sep 17 00:00:00 2001
From: Huang Xin <chrox.huang@gmail.com>
Date: Sat, 2 Aug 2025 07:17:33 +0800
Subject: [PATCH] Fixed multibyte characters in MOBI fragment selectors (#91)

For Chinese/CJK text, multibyte character offsets
were being incorrectly used as bytes offsets after decoding
---
 mobi.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mobi.js b/mobi.js
index 4917af6..939d6dd 100644
--- a/mobi.js
+++ b/mobi.js
@@ -1142,7 +1142,7 @@ class KF8 {
 
             const offsets = this.#fragmentOffsets.get(frag.index)
             if (offsets) for (const offset of offsets) {
-                const str = this.mobi.decode(fragRaw).slice(offset)
+                const str = this.mobi.decode(fragRaw.slice(offset))
                 const selector = getFragmentSelector(str)
                 this.#setFragmentSelector(frag.index, offset, selector)
             }