From 971ca91cb73bbd624fe1984a977e36069251e7ab Mon Sep 17 00:00:00 2001
From: hontas <lundin.pontus@gmail.com>
Date: Thu, 16 Jul 2020 10:26:06 +0200
Subject: [PATCH] simplify isCustomElement check

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

diff --git a/src/runtime/internal/Component.ts b/src/runtime/internal/Component.ts
index 8478723477..c71a0bfc56 100644
--- a/src/runtime/internal/Component.ts
+++ b/src/runtime/internal/Component.ts
@@ -55,7 +55,7 @@ export function claim_component(block, parent_nodes) {
 
 export function mount_component(component, target, anchor) {
 	const { fragment, on_mount, on_destroy, after_update } = component.$$;
-	const isCustomElement = ['connectedCallback', 'attributeChangedCallback', 'disconnectedCallback'].every((method) => typeof component[method] === 'function');
+	const isCustomElement = Object.getPrototypeOf(component.constructor) === SvelteElement;
 
 	fragment && fragment.m(target, anchor);