From 15d6f07a01f299bc1aa2f4240ae6713414e797ad Mon Sep 17 00:00:00 2001
From: RubaXa <ibnRubaXa@gmail.com>
Date: Sat, 7 Feb 2015 23:06:01 +0300
Subject: [PATCH] #254: + check 'effectAllowed' on 'dragover'

---
 Sortable.js | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Sortable.js b/Sortable.js
index bcc6b13..be83ad3 100644
--- a/Sortable.js
+++ b/Sortable.js
@@ -466,6 +466,10 @@
 				isOwner = (activeGroup === group),
 				canSort = options.sort;
 
+			if (evt.dataTransfer && evt.dataTransfer.effectAllowed !== 'move') {
+				return;
+			}
+
 			if (evt.preventDefault !== void 0) {
 				evt.preventDefault();
 				!options.dragoverBubble && evt.stopPropagation();