From 2c0b10b0ee77e27bd1498bd457248686c30a45e4 Mon Sep 17 00:00:00 2001
From: syuilo <Syuilotan@yahoo.co.jp>
Date: Thu, 1 Jun 2023 16:28:24 +0900
Subject: [PATCH] refactor

---
 packages/frontend/src/scripts/emojilist.ts | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/packages/frontend/src/scripts/emojilist.ts b/packages/frontend/src/scripts/emojilist.ts
index 3f63e6b214..79661b7ce9 100644
--- a/packages/frontend/src/scripts/emojilist.ts
+++ b/packages/frontend/src/scripts/emojilist.ts
@@ -30,10 +30,10 @@ for (let i = 0; i < emojilist.length; i++) {
 
 export const emojiCharByCategory = _charGroupByCategory;
 
-export function getEmojiName(char: string): string | undefined {
+export function getEmojiName(char: string): string | null {
 	const idx = _indexByChar.get(char);
-	if (typeof idx === 'undefined') {
-		return undefined;
+	if (idx == null) {
+		return null;
 	} else {
 		return emojilist[idx].name;
 	}