From 097985f087adc30f907e19d087cf36cc48a9a0c3 Mon Sep 17 00:00:00 2001
From: Hykilpikonna <admin@moecraft.cc>
Date: Sat, 21 Dec 2019 11:44:21 -0500
Subject: [PATCH] [O] Optimize nullable format

---
 src/logic/navigator.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/logic/navigator.ts b/src/logic/navigator.ts
index fb6e1cf..01b4c89 100644
--- a/src/logic/navigator.ts
+++ b/src/logic/navigator.ts
@@ -8,7 +8,7 @@ export interface Index
 export default class Navigator
 {
     private activeIndex: Index;
-    private updateCallback: (() => void) | undefined;
+    private updateCallback?: () => void;
 
     /**
      * Update index