From 0b56c5abf87b3713fff827fedd3ea00c830dd4d5 Mon Sep 17 00:00:00 2001
From: Evan You <yyx990803@gmail.com>
Date: Mon, 12 Mar 2018 11:40:35 -0400
Subject: [PATCH] fix: fix keyName checking for arrow keys in IE11

fix #7806
---
 src/compiler/codegen/events.js | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/src/compiler/codegen/events.js b/src/compiler/codegen/events.js
index 58e7b014760..4f9222466ad 100644
--- a/src/compiler/codegen/events.js
+++ b/src/compiler/codegen/events.js
@@ -22,10 +22,11 @@ const keyNames: { [key: string]: string | Array<string> } = {
   tab: 'Tab',
   enter: 'Enter',
   space: ' ',
-  up: 'ArrowUp',
-  left: 'ArrowLeft',
-  right: 'ArrowRight',
-  down: 'ArrowDown',
+  // #7806: IE11 uses key names without `Arrow` prefix for arrow keys.
+  up: ['Up', 'ArrowUp'],
+  left: ['Left', 'ArrowLeft'],
+  right: ['Right', 'ArrowRight'],
+  down: ['Down', 'ArrowDown'],
   'delete': ['Backspace', 'Delete']
 }