From ecff1bc3b76ec793610550d257f01a331bc897e8 Mon Sep 17 00:00:00 2001
From: Vanessa <lly219@gmail.com>
Date: Mon, 20 Jun 2022 22:31:54 +0800
Subject: [PATCH] :bug: fix https://github.com/siyuan-note/siyuan/issues/5248

---
 app/src/protyle/util/selection.ts | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/app/src/protyle/util/selection.ts b/app/src/protyle/util/selection.ts
index f3c169c46..398072b39 100644
--- a/app/src/protyle/util/selection.ts
+++ b/app/src/protyle/util/selection.ts
@@ -412,8 +412,13 @@ export const focusBlock = (element: Element, parentElement?: HTMLElement, toStar
         } else if (type === "NodeBlockQueryEmbed" && element.lastElementChild.previousElementSibling) {
             range.selectNodeContents(element.lastElementChild.previousElementSibling);
             setRange = true;
-        } else if (["NodeMathBlock", "NodeHTMLBlock"].includes(type) && element.lastElementChild.previousElementSibling?.lastElementChild) {
-            range.selectNodeContents(element.lastElementChild.previousElementSibling.lastElementChild);
+        } else if (["NodeMathBlock", "NodeHTMLBlock"].includes(type)) {
+            // https://ld246.com/article/1655714737572
+            if (element.lastElementChild.previousElementSibling?.lastElementChild) {
+                range.selectNodeContents(element.lastElementChild.previousElementSibling.lastElementChild);
+            } else if (element.lastElementChild.previousElementSibling) {
+                range.selectNodeContents(element.lastElementChild.previousElementSibling);
+            }
             setRange = true;
         } else if (type === "NodeIFrame" || type === "NodeWidget") {
             range.setStart(element, 0);