#590: * fallbackTolerance

Sortable.js

@@ -68,6 +68,7 @@
 		_silent = false,
 
 		abs = Math.abs,
+		min = Math.min,
 		slice = [].slice,
 
 		touchDragOverListeners = [],
@@ -469,26 +470,27 @@
 
 		_onTouchMove: function (/**TouchEvent*/evt) {
 			if (tapEvt) {
-
-				var	touch = evt.touches ? evt.touches[0] : evt;
+				var	options = this.options,
+					fallbackTolerance = options.fallbackTolerance,
+					touch = evt.touches ? evt.touches[0] : evt,
+					dx = touch.clientX - tapEvt.clientX,
+					dy = touch.clientY - tapEvt.clientY,
+					translate3d = evt.touches ? 'translate3d(' + dx + 'px,' + dy + 'px,0)' : 'translate(' + dx + 'px,' + dy + 'px)';
 
 				// only set the status to dragging, when we are actually dragging
 				if (!Sortable.active) {
-					if (this.options.fallbackTolerance) {
-						if (Math.min(Math.abs(touch.clientX - this._lastX), Math.abs(touch.clientY - this._lastY)) < this.options.fallbackTolerance) {
+					if (fallbackTolerance &&
+						min(abs(touch.clientX - this._lastX), abs(touch.clientY - this._lastY)) < fallbackTolerance
+					) {
 						return;
 					}
-					}
+
 					this._dragStarted();
 				}
 
 				// as well as creating the ghost element on the document body
 				this._appendGhost();
 
-				var dx = touch.clientX - tapEvt.clientX,
-					dy = touch.clientY - tapEvt.clientY,
-					translate3d = evt.touches ? 'translate3d(' + dx + 'px,' + dy + 'px,0)' : 'translate(' + dx + 'px,' + dy + 'px)';
-
 				moved = true;
 				touchEvt = touch;