From e6b6d2c55b99c7b7a8feeb71261f9cb4d6cd0fbb Mon Sep 17 00:00:00 2001
From: J Bruni <contato@jbruni.com.br>
Date: Fri, 11 Jan 2019 06:38:57 -0200
Subject: [PATCH] Fix cart item quantity change rollback

---
 CHANGELOG.md            | 1 +
 assets/js/theme/cart.js | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0397d658fe..f17e2985f8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,7 @@
 - Major performance improvements. Reduce Javascript bundle size from 376kb to 286kb. [#1390](https://github.com/bigcommerce/cornerstone/pull/1390)
 - Fixed breadcrumbs for product and category pages [#1403](https://github.com/bigcommerce/cornerstone/pull/1403)
 - Send GA tracking event whenever the last product is removed from the CART[#1409](https://github.com/bigcommerce/cornerstone/pull/1409)
+- Fix cart item quantity change rollback [#1418](https://github.com/bigcommerce/cornerstone/pull/1418)
 
 ## 3.0.0 (2018-12-21)
 ### Breaking Changes
diff --git a/assets/js/theme/cart.js b/assets/js/theme/cart.js
index f747b7f086..d7edcb090d 100644
--- a/assets/js/theme/cart.js
+++ b/assets/js/theme/cart.js
@@ -226,7 +226,7 @@ export default class Cart extends PageManager {
         });
 
         // cart qty manually updates
-        $('.cart-item-qty-input', this.$cartContent).on('focus', () => {
+        $('.cart-item-qty-input', this.$cartContent).on('focus', function onQtyFocus() {
             preVal = this.value;
         }).change(event => {
             const $target = $(event.currentTarget);