From 58ad7d7caf475309dbd4e4486a1ed43404d5193c Mon Sep 17 00:00:00 2001
From: Steve Klebanoff <steve.klebanoff@gmail.com>
Date: Mon, 15 Oct 2018 13:15:02 -0700
Subject: change to ? syntax instead of number | undefined

---
 .../instant/src/components/animations/slide_up_and_down_animation.tsx   | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'packages')

diff --git a/packages/instant/src/components/animations/slide_up_and_down_animation.tsx b/packages/instant/src/components/animations/slide_up_and_down_animation.tsx
index 2e8061a19..da34b7485 100644
--- a/packages/instant/src/components/animations/slide_up_and_down_animation.tsx
+++ b/packages/instant/src/components/animations/slide_up_and_down_animation.tsx
@@ -63,7 +63,7 @@ interface SlideUpAndDownState {
 }
 
 export class SlideUpAndDownAnimation extends React.Component<SlideUpAndDownAnimationProps, SlideUpAndDownState> {
-    private _timeoutId: number | undefined;
+    private _timeoutId?: number;
     constructor(props: SlideUpAndDownAnimationProps) {
         super(props);
         this._timeoutId = undefined;
-- 
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