From: hfutsora <31959015+Hfutsora@users.noreply.github.com>
Date: Mon, 2 Aug 2021 13:41:41 +0000 (+0800)
Subject: fix(runtime-dom): fix shadowRoot instanceof check in unsupported browsers (#4238)
X-Git-Tag: v3.2.0-beta.8~14
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=bc7dd93f9223e8c5809ad7b95fcf8b2414181b91;p=thirdparty%2Fvuejs%2Fcore.git

fix(runtime-dom): fix shadowRoot instanceof check in unsupported browsers (#4238)
---

diff --git a/packages/runtime-dom/src/index.ts b/packages/runtime-dom/src/index.ts
index f6f0cf322c..ed35e1293f 100644
--- a/packages/runtime-dom/src/index.ts
+++ b/packages/runtime-dom/src/index.ts
@@ -184,6 +184,7 @@ function normalizeContainer(
   }
   if (
     __DEV__ &&
+    window.ShadowRoot &&
     container instanceof window.ShadowRoot &&
     container.mode === 'closed'
   ) {