Better IE compatibility

src/BrowserInfo.js

@@ -2,7 +2,7 @@ function userAgent(pattern) {
 	return !!navigator.userAgent.match(pattern);
 }
 
-const IE11OrLess = /*@__PURE__*/userAgent(/(?:Trident.*rv[ :]?11\.|msie|iemobile)/i);
+const IE11OrLess = /*@__PURE__*/userAgent(/(?:Trident.*rv[ :]?11\.|msie|iemobile|Windows Phone)/i);
 const Edge = /*@__PURE__*/userAgent(/Edge/i);
 const FireFox = /*@__PURE__*/userAgent(/firefox/i);
 const Safari = /*@__PURE__*/userAgent(/safari/i) && !userAgent(/chrome/i) && !userAgent(/android/i);

src/Sortable.js

@@ -377,7 +377,7 @@ function Sortable(el, options) {
 		dataIdAttr: 'data-id',
 		delay: 0,
 		delayOnTouchOnly: false,
-		touchStartThreshold: Number.parseInt(window.devicePixelRatio, 10) || 1,
+		touchStartThreshold: (Number.parseInt ? Number : window).parseInt(window.devicePixelRatio, 10) || 1,
 		forceFallback: false,
 		fallbackClass: 'sortable-fallback',
 		fallbackOnBody: false,
@@ -666,7 +666,7 @@ Sortable.prototype = /** @lends Sortable.prototype */ {
 	},
 
 	_triggerDragStart: function (/** Event */evt, /** Touch */touch) {
-		touch = touch || (evt.pointerType == 'touch' ? evt : null);
+		touch = touch || (evt.pointerType == 'touch' && evt);
 
 		if (!this.nativeDraggable || touch) {
 			if (this.options.supportPointer) {