From 0df32f886fa0be3e303cc56d0dab659de4839273 Mon Sep 17 00:00:00 2001
From: Wenfang Du <no_reply_mail@163.com>
Date: Tue, 2 Nov 2021 09:45:06 +0800
Subject: [PATCH] fix: `cfg["rowlen"]` might be `undefined`

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

diff --git a/src/global/getRowlen.js b/src/global/getRowlen.js
index 0d5def3..56a3b8e 100644
--- a/src/global/getRowlen.js
+++ b/src/global/getRowlen.js
@@ -87,7 +87,7 @@ function rowlenByRange(d, r1, r2, cfg) {
         if(currentRowLen != Store.defaultrowlen){
             cfg_clone["rowlen"][r] = currentRowLen;
         }else{
-            if(cfg["rowlen"][r]){
+            if(cfg["rowlen"]?.[r]){
                 cfg_clone["rowlen"][r] = cfg["rowlen"][r]
             }
         }