From 158f1fcb82fdff4d8c64e789889935c1303e4f7c Mon Sep 17 00:00:00 2001
From: James N <cc.glows@gmail.com>
Date: Thu, 23 Jun 2022 11:10:55 +1000
Subject: [PATCH] fix(autoUpdate): avoid initial update in microtask (#1755)

---
 packages/dom/src/autoUpdate.ts | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/packages/dom/src/autoUpdate.ts b/packages/dom/src/autoUpdate.ts
index 95432567b6..c727fe18b7 100644
--- a/packages/dom/src/autoUpdate.ts
+++ b/packages/dom/src/autoUpdate.ts
@@ -68,7 +68,14 @@ export function autoUpdate(
 
   let observer: ResizeObserver | null = null;
   if (elementResize) {
-    observer = new ResizeObserver(update);
+    let initialUpdate = true;
+    observer = new ResizeObserver(() => {
+      if (!initialUpdate) {
+        update();
+      }
+
+      initialUpdate = false;
+    });
     isElement(reference) && !animationFrame && observer.observe(reference);
     observer.observe(floating);
   }
@@ -97,9 +104,7 @@ export function autoUpdate(
     frameId = requestAnimationFrame(frameLoop);
   }
 
-  if (!elementResize) {
-    update();
-  }
+  update();
 
   return () => {
     ancestors.forEach((ancestor) => {