From ce334a0d9c392f5531de4d09db37e4be38c368f2 Mon Sep 17 00:00:00 2001
From: shanshuirenjia <978987373@qq.com>
Date: Fri, 20 May 2022 14:20:09 +0800
Subject: [PATCH] fix wraning bug

---
 .../src/pages/markdown-editor/header-toolbar/button-item.js | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/frontend/src/pages/markdown-editor/header-toolbar/button-item.js b/frontend/src/pages/markdown-editor/header-toolbar/button-item.js
index cbe8b5aea5..c6ad10cdf0 100644
--- a/frontend/src/pages/markdown-editor/header-toolbar/button-item.js
+++ b/frontend/src/pages/markdown-editor/header-toolbar/button-item.js
@@ -21,11 +21,15 @@ class ButtonItem extends React.Component {
 
   constructor(props) {
     super(props);
-
     this.state = {
       tooltipOpen: false,
       isFreezed: false,
     };
+    this.timer = null;
+  }
+
+  componentWillUnmount() {
+    this.timer && clearTimeout(this.timer);
   }
 
   toggle = () => {