diff --git a/app/src/protyle/wysiwyg/getBlock.ts b/app/src/protyle/wysiwyg/getBlock.ts
index 655724cb8..8c7ea1bdc 100644
--- a/app/src/protyle/wysiwyg/getBlock.ts
+++ b/app/src/protyle/wysiwyg/getBlock.ts
@@ -170,15 +170,3 @@ export const hasPreviousSibling = (element: Node) => {
     }
     return false;
 };
-
-export const hasPrevious = (element: Node) => {
-    let previousSibling = element.previousSibling;
-    while (previousSibling) {
-        if (previousSibling.textContent === "") {
-            previousSibling = previousSibling.previousSibling;
-        } else {
-            return previousSibling;
-        }
-    }
-    return false;
-};
diff --git a/app/src/protyle/wysiwyg/keydown.ts b/app/src/protyle/wysiwyg/keydown.ts
index 4144a6cb4..ce8d0b454 100644
--- a/app/src/protyle/wysiwyg/keydown.ts
+++ b/app/src/protyle/wysiwyg/keydown.ts
@@ -17,7 +17,7 @@ import {
     getLastBlock,
     getNextBlock,
     getPreviousBlock,
-    getTopAloneElement, hasNextSibling, hasPrevious,
+    getTopAloneElement, hasNextSibling, hasPreviousSibling,
     isNotEditBlock,
 } from "./getBlock";
 import {matchHotKey} from "../util/hotKey";
@@ -593,7 +593,7 @@ export const keydown = (protyle: IProtyle, editorElement: HTMLElement) => {
                     const currentNode = range.startContainer.childNodes[range.startOffset - 1] as HTMLElement;
                     if (position.start === 0 && (
                         range.startOffset === 0 ||
-                        (currentNode && currentNode.nodeType === 3 && !hasPrevious(currentNode) && currentNode.textContent === "") // https://ld246.com/article/1649251218696
+                        (currentNode && currentNode.nodeType === 3 && !hasPreviousSibling(currentNode) && currentNode.textContent === "") // https://ld246.com/article/1649251218696
                     )) {
                         removeBlock(protyle, nodeElement, range);
                         event.stopPropagation();