only call widget.resize() if it's a function:

- web-components do not implement it
- et2-textarea / SlTextarea uses resize as a property name
--> we can postpone the decision, if we need an explicit resize handler for our web-components, or using flex is sufficient, for now

api/js/etemplate/Layout/Et2Split/Et2Split.ts

@@ -320,8 +320,11 @@ export class Et2Split extends Et2Widget(SlotMixin(SlSplitPanel))
 
 			// Tell widgets that manually resize about it
 			this.iterateOver(function(_widget)
+			{
+				if (typeof _widget.resize === 'function')
 				{
 					_widget.resize();
+				}
 			}, self, et2_IResizeable);
 		}.bind(this), 100);
 	}

api/js/etemplate/et2_extension_nextmatch.ts

@@ -1730,8 +1730,11 @@ export class et2_nextmatch extends et2_DOMWidget implements et2_IResizeable, et2
 
 			// Allow column widgets a chance to resize
 			self.iterateOver(function(widget)
+			{
+				if (typeof widget.resize === 'function')
 				{
 					widget.resize();
+				}
 			}, self, et2_IResizeable);
 		};
 
@@ -2190,8 +2193,11 @@ export class et2_nextmatch extends et2_DOMWidget implements et2_IResizeable, et2
 
 		// Allow column widgets a chance to resize
 		this.iterateOver(function(widget)
+		{
+			if (typeof widget.resize === 'function')
 			{
 				widget.resize();
+			}
 		}, this, et2_IResizeable);
 	}
 

api/js/etemplate/et2_widget_portlet.ts

@@ -150,7 +150,12 @@ export class et2_portlet extends et2_valueWidget
 						self
 					);
 					// Tell children
-					self.iterateOver(function(widget) {widget.resize();},null,et2_IResizeable);
+					self.iterateOver(function(widget) {
+						if (typeof widget.resize === 'function')
+						{
+							widget.resize();
+						}
+					},null,et2_IResizeable);
 				}
 			});
 		this.header = jQuery(document.createElement("div"))
@@ -330,7 +335,12 @@ export class et2_portlet extends et2_valueWidget
 				{
 					// Tell children
 					try {
-						this.iterateOver(function(widget) {widget.resize();},null,et2_IResizeable);
+						this.iterateOver(function(widget) {
+							if (typeof widget.resize === 'function')
+							{
+								widget.resize();
+							}
+						},null,et2_IResizeable);
 					} catch (e) {
 						// Something went wrong, but do not stop
 						egw.debug('warn',e,this);
@@ -430,4 +440,3 @@ export class et2_portlet extends et2_valueWidget
 	}
 }
 et2_register_widget(et2_portlet, ["portlet"]);
-

api/js/etemplate/etemplate2.ts

@@ -275,8 +275,11 @@ export class etemplate2
 					if(jQuery(self.DOMContainer).is(":visible"))
 					{
 						self._widgetContainer.iterateOver(function(_widget)
+						{
+							if (typeof _widget.resize === 'function')
 							{
 								_widget.resize(excess_height);
+							}
 						}, self, et2_IResizeable);
 					}
 				}

calendar/js/et2_widget_timegrid.ts

@@ -943,8 +943,10 @@ export class et2_calendar_timegrid extends et2_calendar_view implements et2_IDet
 		if(this.rowHeight != old_height)
 		{
 			this.iterateOver(function(child) {
-				if(child === this) return;
+				if (child !== this && typeof child.resize === 'function')
+				{
 					child.resize();
+				}
 			},this, et2_IResizeable);
 		}