diff --git a/app/utils.ts b/app/utils.ts
index 3afe40c61..5fe277c63 100644
--- a/app/utils.ts
+++ b/app/utils.ts
@@ -1,6 +1,10 @@
 import { showToast } from "./components/ui-lib";
 import Locale from "./locales";
 
+export function trimTopic(topic: string) {
+  return topic.replace(/[，。！？、,.!?]*$/, "");
+}
+
 export async function copyToClipboard(text: string) {
   try {
     await navigator.clipboard.writeText(text);