#199: + check 'dataTransfer' exists

10 years ago · 0ffa616f10
1 changed files with 4 additions and 2 deletions
--- a/Sortable.js
+++ b/Sortable.js
@ -372,8 +372,10 @@
 				this._loopId = setInterval(this._emulateDragOver, 150);
 			}
 			else {
-				dataTransfer.effectAllowed = 'move';
+				if (dataTransfer) {
-				options.setData && options.setData.call(this, dataTransfer, dragEl);
+					dataTransfer.effectAllowed = 'move';
 					options.setData && options.setData.call(this, dataTransfer, dragEl);
 				}
 				_on(document, 'drop', this);
 			}