From c18c80c65a51b34825614c264f872c3aacba7373 Mon Sep 17 00:00:00 2001
From: Sebastian Speitel <sebastian.speitel@outlook.de>
Date: Wed, 8 Jan 2020 00:10:51 +0100
Subject: [PATCH] Predefine typeCheck RegExp

---
 src/core/util/props.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/core/util/props.js b/src/core/util/props.js
index 1b57f77cdb5..f5b867e9266 100644
--- a/src/core/util/props.js
+++ b/src/core/util/props.js
@@ -174,13 +174,15 @@ function assertType (value: any, type: Function): {
   }
 }
 
+const functionTypeCheckRE = /^\s*function (\w+)/
+
 /**
  * Use function string name to check built-in types,
  * because a simple equality check will fail when running
  * across different vms / iframes.
  */
 function getType (fn) {
-  const match = fn && fn.toString().match(/^\s*function (\w+)/)
+  const match = fn && fn.toString().match(functionTypeCheckRE)
   return match ? match[1] : ''
 }