Fix useResizeObserver loop limit exceeded warning

packages/@react-aria/utils/src/useResizeObserver.ts

@@ -1,4 +1,4 @@
-import {RefObject, useEffect} from 'react';
+import {RefObject, useEffect, useRef} from 'react';
 
 function hasResizeObserver() {
   return typeof window.ResizeObserver !== 'undefined';
@@ -11,6 +11,7 @@ type useResizeObserverOptionsType<T> = {
 
 export function useResizeObserver<T extends Element>(options: useResizeObserverOptionsType<T>) {
   const {ref, onResize} = options;
+  let raf = useRef(null);
 
   useEffect(() => {
     let element = ref?.current;
@@ -24,17 +25,28 @@ export function useResizeObserver<T extends Element>(options: useResizeObserverO
         window.removeEventListener('resize', onResize, false);
       };
     } else {
-
       const resizeObserverInstance = new window.ResizeObserver((entries) => {
-        if (!entries.length) {
+        if (raf.current) {
           return;
         }
-
-        onResize();
+        // avoid Error - ResizeObserver loop limit exceeded
+        // it's ok to use a raf, ResizeObservers are already async and now we're just debouncing on frames
+        raf.current = window.requestAnimationFrame(() => {
+          raf.current = null;
+          if (!Array.isArray(entries) || !entries.length) {
+            return;
+          }
+          onResize();
+        });
       });
+
       resizeObserverInstance.observe(element);
 
       return () => {
+        if (raf.current) {
+          window.cancelAnimationFrame(raf.current);
+          raf.current = null;
+        }
         if (element) {
           resizeObserverInstance.unobserve(element);
         }

packages/@react-aria/utils/stories/useResizeObserver.stories.tsx

@@ -0,0 +1,55 @@
+
+import {Button} from '@react-spectrum/button';
+import {Meta, Story} from '@storybook/react';
+import React, {useEffect, useRef, useState} from 'react';
+import {useResizeObserver} from '../src';
+
+export default {
+  title: 'useResizeObserver'
+} as Meta;
+
+const Template: Story<any> = () => (
+  <App />
+);
+
+export const UseResizeObserverLoopLimit = Template.bind({});
+UseResizeObserverLoopLimit.args = {};
+
+const animalSet = ['🐰', '🦊', '🐻', '🐭', '🐼', '🐸'];
+function App() {
+  let ref = useRef<HTMLDivElement>();
+  let index = useRef(0);
+  let [animals, setAnimals] = useState([animalSet[0]]);
+
+  function insertAnimal() {
+    index.current = index.current + 1;
+    setAnimals(prev => [...prev, animalSet[index.current % animalSet.length]]);
+  }
+
+  useEffect(() => {
+    let onError = (err) => {
+      console.log(err);
+    };
+    window.addEventListener('error', onError);
+    return () => {
+      window.removeEventListener('error', onError);
+    };
+  }, []);
+
+  let onResize = () => {
+    const {width} = ref.current.getBoundingClientRect();
+
+    ref.current.style.height = `${width}px`;
+  };
+
+  useResizeObserver({onResize, ref});
+
+  return (
+    <>
+      <div ref={ref} id="red-box">
+        {animals}
+      </div>
+      <Button variant="primary" onPress={insertAnimal}>Insert Next Animal</Button>
+    </>
+  );
+}