From 292c195e9b7c186edc176887e53701e2e133c9fe Mon Sep 17 00:00:00 2001
From: Vanessa <lly219@gmail.com>
Date: Fri, 13 Jan 2023 15:25:58 +0800
Subject: [PATCH] :bug: fix https://github.com/siyuan-note/siyuan/issues/7066

---
 app/src/protyle/wysiwyg/remove.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/app/src/protyle/wysiwyg/remove.ts b/app/src/protyle/wysiwyg/remove.ts
index 2317bbffc..58ff479c7 100644
--- a/app/src/protyle/wysiwyg/remove.ts
+++ b/app/src/protyle/wysiwyg/remove.ts
@@ -448,7 +448,7 @@ export const removeBlock = (protyle: IProtyle, blockElement: Element, range: Ran
             // 非空块
             range.setEndAfter(editableElement.lastChild);
             // 数学公式会车后再删除 https://github.com/siyuan-note/siyuan/issues/3850
-            if (previousLastEditElement?.lastElementChild?.getAttribute("data-type").indexOf("inline-math") > -1) {
+            if ((previousLastEditElement?.lastElementChild?.getAttribute("data-type") || "").indexOf("inline-math") > -1) {
                 const lastSibling = hasNextSibling(previousLastEditElement?.lastElementChild);
                 if (lastSibling && lastSibling.textContent === "\n") {
                     lastSibling.remove();