From fdc59e07b58e773ef85722a9f8c7ccee6ee15d8c Mon Sep 17 00:00:00 2001
From: sy-records <52o@qq52o.cn>
Date: Wed, 26 Aug 2020 08:46:34 +0800
Subject: [PATCH] fix: Cannot read property level of undefined

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

diff --git a/src/core/render/compiler.js b/src/core/render/compiler.js
index 2978a9f26..17e0a8144 100644
--- a/src/core/render/compiler.js
+++ b/src/core/render/compiler.js
@@ -279,7 +279,7 @@ export class Compiler {
           // Remove headers who are under current header
           for (
             let j = i;
-            deletedHeaderLevel < toc[j].level && j < toc.length;
+            j < toc.length && deletedHeaderLevel < toc[j].level;
             j++
           ) {
             toc.splice(j, 1) && j-- && i++;