From c671596c6facba8f778bcfe9a8eb2827fe519821 Mon Sep 17 00:00:00 2001
From: Bruno Windels <bruno@windels.cloud>
Date: Fri, 5 Nov 2021 17:48:08 +0100
Subject: [PATCH] only schedule one resize callback per frame

---
 src/platform/web/ui/session/room/MessageComposer.js | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/platform/web/ui/session/room/MessageComposer.js b/src/platform/web/ui/session/room/MessageComposer.js
index 11007b84..6fe0d424 100644
--- a/src/platform/web/ui/session/room/MessageComposer.js
+++ b/src/platform/web/ui/session/room/MessageComposer.js
@@ -25,6 +25,7 @@ export class MessageComposer extends TemplateView {
         this._input = null;
         this._attachmentPopup = null;
         this._focusInput = null;
+        this._rafResizeHandle = undefined;
     }
 
     render(t, vm) {
@@ -112,10 +113,14 @@ export class MessageComposer extends TemplateView {
     }
 
     _adjustHeight() {
-        window.requestAnimationFrame(() => {
+        if (this._rafResizeHandle) {
+            return;
+        }
+        this._rafResizeHandle = window.requestAnimationFrame(() => {
             this._input.style.height = "auto";
             const scrollHeight = this._input.scrollHeight;
             this._input.style.height = `${scrollHeight}px`;
+            this._rafResizeHandle = undefined;
         });
     }