From f765c4dd9d29eb7ee7f25582b2dce2f595cf7e57 Mon Sep 17 00:00:00 2001
From: Yamagishi Kazutoshi <ykzts@desire.sh>
Date: Wed, 29 Jul 2020 02:22:16 +0900
Subject: [PATCH] fix(event): use Object.defineProperty (#115)

---
 src/dom/event.ts | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/src/dom/event.ts b/src/dom/event.ts
index b326f8e..ae06974 100644
--- a/src/dom/event.ts
+++ b/src/dom/event.ts
@@ -117,9 +117,13 @@ export default class Event {
   constructor(type: string, eventInit: EventInit = {}) {
     if (!type) throw new TypeError('Not enough arguments.');
 
-    this[internalEventSymbol] = new InternalEvent(type, {
-      bubbles: eventInit.bubbles ?? false,
-      cancelable: eventInit.cancelable ?? false
+    Object.defineProperty(this, internalEventSymbol, {
+      enumerable: false,
+      value: new InternalEvent(type, {
+        bubbles: eventInit.bubbles ?? false,
+        cancelable: eventInit.cancelable ?? false
+      }),
+      writable: true
     });
   }