diff --git a/src/compiler/compile/render_dom/wrappers/Element/index.ts b/src/compiler/compile/render_dom/wrappers/Element/index.ts
index 9cab8d20dc..8418cd9531 100644
--- a/src/compiler/compile/render_dom/wrappers/Element/index.ts
+++ b/src/compiler/compile/render_dom/wrappers/Element/index.ts
@@ -713,7 +713,7 @@ export default class ElementWrapper extends Wrapper {
 					"elementresizeobservecontentbox": "add_content_box_observer",
 					"elementresizeobserveborderbox": "add_border_box_observer",
 					"elementresizeobservedevicepixelcontentbox": "add_device_pixel_content_box_observer",
-				})[name]
+				})[name];
 
 				block.chunks.mount.push(
 					b`${resize_listener} = @${functionName}(${this.var}, ${callee}.bind(${this.var}));`
diff --git a/src/runtime/internal/dom.ts b/src/runtime/internal/dom.ts
index ed91330bbf..1d2b59bb1a 100644
--- a/src/runtime/internal/dom.ts
+++ b/src/runtime/internal/dom.ts
@@ -661,19 +661,19 @@ export function add_device_pixel_content_box_observer(node: Element, fn: () => v
 }
 
 export function get_content_rect(node: Element) {
-	return resize_observer_content_box.getLastEntry(node)!.contentRect;
+	return resize_observer_content_box.getLastEntry(node)?.contentRect;
 }
 
 export function get_content_box_size(node: Element) {
-	return resize_observer_content_box.getLastEntry(node)!.contentBoxSize;
+	return resize_observer_content_box.getLastEntry(node)?.contentBoxSize;
 }
 
 export function get_border_box_size(node: Element) {
-	return resize_observer_border_box.getLastEntry(node)!.borderBoxSize;
+	return resize_observer_border_box.getLastEntry(node)?.borderBoxSize;
 }
 
 export function get_device_pixel_content_box_size(node: Element) {
-	return resize_observer_device_pixel_content_box.getLastEntry(node)!.devicePixelContentBoxSize;
+	return resize_observer_device_pixel_content_box.getLastEntry(node)?.devicePixelContentBoxSize;
 }