From a65cfe98d55e357d3ea50a19f0fd0f571708ea8b Mon Sep 17 00:00:00 2001
From: Jeremy Ruston <jeremy@jermolene.com>
Date: Wed, 20 Nov 2019 17:38:28 +0000
Subject: [PATCH] Slight optimisation of $tw.utils.addClass()

---
 core/modules/utils/dom/dom.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/core/modules/utils/dom/dom.js b/core/modules/utils/dom/dom.js
index b01ea3ac1..c90dc8009 100644
--- a/core/modules/utils/dom/dom.js
+++ b/core/modules/utils/dom/dom.js
@@ -36,8 +36,8 @@ exports.addClass = function(el,className) {
 	var c = el.className.split(" ");
 	if(c.indexOf(className) === -1) {
 		c.push(className);
+		el.className = c.join(" ");
 	}
-	el.className = c.join(" ");
 };
 
 exports.removeClass = function(el,className) {