From 3fef8cab111b31e98157ea3a14e2a4e533ed2d5f Mon Sep 17 00:00:00 2001
From: Keith Cirkel <keithamus@users.noreply.github.com>
Date: Wed, 10 May 2023 11:42:25 +0100
Subject: [PATCH] safely extend DocumentFragment if available

---
 src/template-instance.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/template-instance.ts b/src/template-instance.ts
index 4e6ce0c..ca086ae 100644
--- a/src/template-instance.ts
+++ b/src/template-instance.ts
@@ -40,7 +40,7 @@ function* collectParts(el: DocumentFragment): Generator<TemplatePart> {
 
 const processors = new WeakMap<TemplateInstance, TemplateTypeInit>()
 const parts = new WeakMap<TemplateInstance, Iterable<TemplatePart>>()
-export class TemplateInstance extends DocumentFragment {
+export class TemplateInstance extends (globalThis.DocumentFragment || EventTarget) {
   constructor(template: HTMLTemplateElement, params: unknown, processor: TemplateTypeInit = propertyIdentity) {
     super()
     // This is to fix an inconsistency in Safari which prevents us from