Update dom.ts

src/runtime/internal/dom.ts

@@ -261,6 +261,7 @@ export function is_crossorigin() {
 
 export function add_resize_listener(node: HTMLElement, fn: () => void) {
 	if ('ResizeObserver' in window) {
+		// @ts-ignore https://github.com/Microsoft/TypeScript/issues/28502
 		const obs = new ResizeObserver(fn) as any;
 		obs.observe(node);
 		return obs.disconnect.bind(obs);