From 420358c3500dead712ed6651d3f972f23b4738d4 Mon Sep 17 00:00:00 2001
From: Milan Jaritz <milan.jaritz@gmail.com>
Date: Thu, 15 Apr 2021 22:48:15 +0200
Subject: [PATCH] make crossfade fallback param optional

---
 src/runtime/transition/index.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/runtime/transition/index.ts b/src/runtime/transition/index.ts
index 3a978a146a6b..dc398348b44d 100644
--- a/src/runtime/transition/index.ts
+++ b/src/runtime/transition/index.ts
@@ -207,7 +207,7 @@ export interface CrossfadeParams {
 type ClientRectMap = Map<any, { rect: ClientRect }>;
 
 export function crossfade({ fallback, ...defaults }: CrossfadeParams & {
-	fallback: (node: Element, params: CrossfadeParams, intro: boolean) => TransitionConfig;
+	fallback?: (node: Element, params: CrossfadeParams, intro: boolean) => TransitionConfig;
 }) {
 	const to_receive: ClientRectMap = new Map();
 	const to_send: ClientRectMap = new Map();