From 7c5e797f875a5f64067f84049a542d96e4874d4f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Kristj=C3=A1n=20Oddsson?= <koddsson@gmail.com>
Date: Tue, 2 Nov 2021 10:38:03 +0000
Subject: [PATCH] Maintain scroll position while a textarea is resized

---
 src/index.ts | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/index.ts b/src/index.ts
index c058549..6f525de 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -64,6 +64,8 @@ export default function autosize(textarea: HTMLTextAreaElement, {viewportMarginB
     const adjustedViewportMarginBottom = bottom < viewportMarginBottom ? bottom : viewportMarginBottom
     textarea.style.maxHeight = `${maxHeight - adjustedViewportMarginBottom}px`
 
+    const scrollPosition = document.documentElement.scrollTop
+
     const container = textarea.parentElement
     if (container instanceof HTMLElement) {
       const containerHeight = container.style.height
@@ -73,6 +75,7 @@ export default function autosize(textarea: HTMLTextAreaElement, {viewportMarginB
       container.style.height = containerHeight
       const options = map.get(textarea) || {}
       options.previousHeight = textarea.style.height
+      document.documentElement.scrollTop = scrollPosition
     }
 
     const options = map.get(textarea) || {}