From 5877f3d0f17ba6f131337fa883da67895bf59ca0 Mon Sep 17 00:00:00 2001
From: Hadi Nategh <hnategh@gmail.com>
Date: Wed, 28 Aug 2019 16:14:53 +0200
Subject: [PATCH] Fix dragover class flickering issue

---
 api/js/Resumable/resumable.js | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/api/js/Resumable/resumable.js b/api/js/Resumable/resumable.js
index 27aebf9835..f46bd6e752 100644
--- a/api/js/Resumable/resumable.js
+++ b/api/js/Resumable/resumable.js
@@ -231,8 +231,9 @@
         loadFiles(e.dataTransfer.files, e);
       }
     };
+	var counterDrag = 0;
     var onDragLeave = function(e){
-      e.currentTarget.classList.remove($.getOpt('dragOverClass'));
+      if (--counterDrag == 0) e.currentTarget.classList.remove($.getOpt('dragOverClass'));
     };
     var onDragOverEnter = function(e) {
       e.preventDefault();
@@ -241,7 +242,7 @@
         e.stopPropagation();
         dt.dropEffect = "copy";
         dt.effectAllowed = "copy";
-        e.currentTarget.classList.add($.getOpt('dragOverClass'));
+        if (e.type == 'dragenter' && counterDrag++ === 0) e.currentTarget.classList.add($.getOpt('dragOverClass'));
       } else { // not work on IE/Edge....
         dt.dropEffect = "none";
         dt.effectAllowed = "none";