From 70ce2bf293d0abc0a4eab1b695764beb11dc90f8 Mon Sep 17 00:00:00 2001
From: Treecat <treecat@fanruan.com>
Date: Tue, 11 Apr 2023 13:57:25 +0800
Subject: [PATCH] =?UTF-8?q?KERNEL-14316=20chore:=20=E4=BB=A3=E7=A0=81?=
 =?UTF-8?q?=E8=B0=83=E6=95=B4?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 packages/fineui/src/polyfill/event.js | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/packages/fineui/src/polyfill/event.js b/packages/fineui/src/polyfill/event.js
index 346ec16c8..decca0f7f 100644
--- a/packages/fineui/src/polyfill/event.js
+++ b/packages/fineui/src/polyfill/event.js
@@ -1,9 +1,9 @@
-(function () {
-    if (typeof window.CustomEvent === "function") return false; // If not IE
+const isIE = () => typeof window.CustomEvent !== "function";
 
-    function CustomEvent (event, params) {
+if (isIE()) {
+    function CustomEvent(event, params) {
         params = params || { bubbles: false, cancelable: false, detail: undefined };
-        var evt = document.createEvent("CustomEvent");
+        const evt = document.createEvent("CustomEvent");
         evt.initCustomEvent(event, params.bubbles, params.cancelable, params.detail);
 
         return evt;
@@ -12,4 +12,4 @@
     CustomEvent.prototype = window.Event.prototype;
 
     window.CustomEvent = CustomEvent;
-}());
+}