From 54918719681fcff1ccb17faf889691efdef8dc38 Mon Sep 17 00:00:00 2001
From: Ivan Hofer <ivan.hofer@outlook.com>
Date: Sat, 5 Feb 2022 09:52:56 +0100
Subject: [PATCH] replace `undefined` with `null`

---
 src/runtime/internal/lifecycle.ts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/runtime/internal/lifecycle.ts b/src/runtime/internal/lifecycle.ts
index faaeac2988e..4eacb698d62 100644
--- a/src/runtime/internal/lifecycle.ts
+++ b/src/runtime/internal/lifecycle.ts
@@ -34,9 +34,9 @@ type UnionToIntersection<U> = (U extends any ? (k: U) => void : never) extends (
 type ExtractObjectValues<Object extends Record<any, any>> = Object[keyof Object]
 
 type ConstructDispatchFunction<EventMap extends Record<string, any>, EventKey extends keyof EventMap> =
-	EventMap[EventKey] extends never
+	EventMap[EventKey] extends never | null
 	? (type: EventKey) => void
-	: undefined extends EventMap[EventKey]
+	: null extends EventMap[EventKey]
 	? (type: EventKey, detail?: EventMap[EventKey]) => void
 	: (type: EventKey, detail: EventMap[EventKey]) => void