From 873e3fc3927d8484ee6b7ea768ef1816f0c3c8fa Mon Sep 17 00:00:00 2001
From: Yuriy Kravets <yucikkravets@gmail.com>
Date: Wed, 19 Dec 2018 20:24:38 +0100
Subject: [PATCH] Checking whether the custom element wasn't registered

---
 src/compile/render-dom/index.ts | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/compile/render-dom/index.ts b/src/compile/render-dom/index.ts
index 039f901731..b080ddbc62 100644
--- a/src/compile/render-dom/index.ts
+++ b/src/compile/render-dom/index.ts
@@ -290,7 +290,9 @@ export default function dom(
 				}
 			});
 
-			customElements.define("${component.tag}", ${name});
+			if (!customElements.get(${component.tag})) {
+				customElements.define("${component.tag}", ${name});
+			}
 		`);
 	} else {
 		builder.addBlock(deindent`