From 5cfff8d6d35e9a2509aa6495fe8ee9eb96703939 Mon Sep 17 00:00:00 2001
From: pushkin <pushkine.github@gmail.com>
Date: Tue, 13 Oct 2020 11:14:35 +0200
Subject: [PATCH] Update dom.ts

---
 src/runtime/internal/dom.ts | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/runtime/internal/dom.ts b/src/runtime/internal/dom.ts
index 5380443fbc..38ed48fcf5 100644
--- a/src/runtime/internal/dom.ts
+++ b/src/runtime/internal/dom.ts
@@ -260,6 +260,11 @@ export function is_crossorigin() {
 }
 
 export function add_resize_listener(node: HTMLElement, fn: () => void) {
+	if ('ResizeObserver' in window) {
+		const obs = new ResizeObserver(fn);
+		obs.observe(node);
+		return obs.disconnect.bind(obs);
+	}
 	const computed_style = getComputedStyle(node);
 	const z_index = (parseInt(computed_style.zIndex) || 0) - 1;