Fix lightbox resizing

script/lightbox.js

@@ -337,6 +337,8 @@
         , type: $link.attr('data-type')
         , id: $link.attr('data-id')
 		, $Media: $link.attr('data-type')=='video'?self.$video:self.$image
+		, width: $link.find('img').attr('width')
+		, height: $link.find('img').attr('height')
         //ADDED-END
       });
     }
@@ -506,15 +508,11 @@
 			// When image to show is preloaded, we send the width and height to sizeContainer()
 			var preloader = new Image();
 			preloader.onload = function(){
-				var $preloader;
-				
 				self.$image.attr({
 					'alt': self.album[imageNumber].alt,
 					'src': filename
 				});
 
-				$preloader = $(preloader);
-
 				//Orientation management
 				if(Math.abs(self.album[imageNumber].orientation) == 90 && preloader.width > preloader.height) {
 					var sWidth = preloader.width;
@@ -557,15 +555,20 @@
     }, 0);
 	*/
     if(e) {
-		var oMedia = this.album[this.currentImageIndex];
-		if(oMedia.type == 'image') {
-			if(typeof oResizeTimer != 'undefined') clearTimeout(oResizeTimer);
-			oResizeTimer = setTimeout(()=>{this.changeImage(this.currentImageIndex);}, 200);
-		}
-		else {
-			//var $Media = oMedia.$Media;
-			//this.updateSize($($Media), $Media.videoWidth, $Media.videoHeight, oMedia.type);
-		}
+		if(typeof oResizeTimer != 'undefined') clearTimeout(oResizeTimer);
+		oResizeTimer = setTimeout(
+			() => {
+				switch(this.album[this.currentImageIndex].type) {
+					case 'image':
+						this.changeImage(this.currentImageIndex);
+						break;
+					case 'video':
+						this.updateSize(this.currentImageIndex);
+						break;
+				}
+			},
+			200
+		);
     }
     //ADDED-END
   };
@@ -710,11 +713,11 @@
 
   // Preload previous and next images in set.
   Lightbox.prototype.preloadNeighboringImages = function() {
-    if (this.album.length > this.currentImageIndex + 1) {
+    if (this.album.length > this.currentImageIndex + 1 && this.album[this.currentImageIndex + 1].type == 'image') {
       var preloadNext = new Image();
       preloadNext.src = this.album[this.currentImageIndex + 1].link;
     }
-    if (this.currentImageIndex > 0) {
+    if (this.currentImageIndex > 0 && this.album[this.currentImageIndex - 1].type == 'image') {
       var preloadPrev = new Image();
       preloadPrev.src = this.album[this.currentImageIndex - 1].link;
     }