Fix IE11

Author: movedoa

src/ResizeSensor.js

@@ -83,9 +83,9 @@
      * @constructor
      */
     var ResizeSensor = function(element, callback) {
-       
+
         var observer;
-       
+
         /**
          *
          * @constructor
@@ -161,44 +161,44 @@
             var lastWidth = size.width;
             var lastHeight = size.height;
             var initialHiddenCheck = true, resetRAF_id;
-            
-            
+
+
             var resetExpandShrink_ = function () {
-		        expandChild.style.width = '100000px';
-		        expandChild.style.height = '100000px';
-		
-		        expand.scrollLeft = 100000;
-		        expand.scrollTop = 100000;
-		
-		        shrink.scrollLeft = 100000;
-		        shrink.scrollTop = 100000;
-	        };
+              expandChild.style.width = '100000px';
+              expandChild.style.height = '100000px';
+
+              expand.scrollLeft = 100000;
+              expand.scrollTop = 100000;
+
+              shrink.scrollLeft = 100000;
+              shrink.scrollTop = 100000;
+           };
             var reset = function() {
-            	// Check if element is hidden
-            	if (initialHiddenCheck){
-            		if (!expand.scrollTop && !expand.scrollLeft) {
-
-            			// reset
-			            resetExpandShrink_();
-
-			            // Check in next frame
-			            if (!resetRAF_id){
-			            	resetRAF_id = requestAnimationFrame(function(){
-					            resetRAF_id = 0;
-					            
-			            		reset();
-				            });
-			            }
-            			
-			            return;
-		            }
-		            // Stop checking
-		            else{
-			            initialHiddenCheck = false;
-		            }
-	            }
-
-	            resetExpandShrink_();
+               // Check if element is hidden
+               if (initialHiddenCheck){
+                  if (!expand.scrollTop && !expand.scrollLeft) {
+
+                     // reset
+                     resetExpandShrink_();
+
+                     // Check in next frame
+                     if (!resetRAF_id){
+                        resetRAF_id = requestAnimationFrame(function(){
+                           resetRAF_id = 0;
+
+                           reset();
+                        });
+                     }
+
+                     return;
+                  }
+                  // Stop checking
+                  else{
+                     initialHiddenCheck = false;
+                  }
+               }
+
+               resetExpandShrink_();
             };
             element.resizeSensor.resetSensor = reset;
 
@@ -240,22 +240,22 @@
 
             addEvent(expand, 'scroll', onScroll);
             addEvent(shrink, 'scroll', onScroll);
-            
+
             // Fix for custom Elements
             requestAnimationFrame(reset);
         }
-         
+
         if (typeof ResizeObserver != "undefined") {
-            observer = new ResizeObserver(function(entries){
-                for (var entry of entries) {
+            observer = new ResizeObserver(function(element){
+                forEachElement(element, function (elem) {
                     callback.call(
                         this,
                         {
-                            width: entry.contentRect.width,
-                            height: entry.contentRect.height
+                            width: elem.contentRect.width,
+                            height: elem.contentRect.height
                         }
                    );
-                }
+                });
             });
             if (element !== undefined) {
                 forEachElement(element, function(elem){