From 94376f61417b02be3ea1b1afffd117e9e75283a9 Mon Sep 17 00:00:00 2001
From: Cheese <11363971+cheese-git@users.noreply.github.com>
Date: Fri, 10 Dec 2021 21:09:54 +0800
Subject: [PATCH] =?UTF-8?q?=F0=9F=90=9B=20could=20pass=20`undefined`=20to?=
 =?UTF-8?q?=20Node.contains()=20(#1863)?=
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---
 src/sandbox/patchers/dynamicAppend/common.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/sandbox/patchers/dynamicAppend/common.ts b/src/sandbox/patchers/dynamicAppend/common.ts
index 969b76b..e4e1677 100644
--- a/src/sandbox/patchers/dynamicAppend/common.ts
+++ b/src/sandbox/patchers/dynamicAppend/common.ts
@@ -144,7 +144,7 @@ function getOverwrittenAppendChildOrInsertBefore(opts: {
   return function appendChildOrInsertBefore<T extends Node>(
     this: HTMLHeadElement | HTMLBodyElement,
     newChild: T,
-    refChild?: Node | null,
+    refChild: Node | null = null,
   ) {
     let element = newChild as any;
     const { rawDOMAppendOrInsertBefore, isInvokedByMicroApp, containerConfigGetter } = opts;