From 726541ae08f5e5c0a8bc000f4d71bb94b2938a61 Mon Sep 17 00:00:00 2001
From: afc163 <afc163@gmail.com>
Date: Tue, 27 Jun 2017 12:03:10 +0800
Subject: [PATCH] Improve autosize textarea scrollbar style, close #6609

---
 components/input/calculateNodeHeight.tsx | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/components/input/calculateNodeHeight.tsx b/components/input/calculateNodeHeight.tsx
index e3226e570e..13fdc7d3e6 100644
--- a/components/input/calculateNodeHeight.tsx
+++ b/components/input/calculateNodeHeight.tsx
@@ -119,6 +119,7 @@ export default function calculateNodeHeight(
   let minHeight = -Infinity;
   let maxHeight = Infinity;
   let height = hiddenTextarea.scrollHeight;
+  let overflowY;
 
   if (boxSizing === 'border-box') {
     // border-box: add border, since height = content + padding + border
@@ -144,8 +145,9 @@ export default function calculateNodeHeight(
       if (boxSizing === 'border-box') {
         maxHeight = maxHeight + paddingSize + borderSize;
       }
+      overflowY = height > maxHeight ? '' : 'hidden';
       height = Math.min(maxHeight, height);
     }
   }
-  return { height, minHeight, maxHeight };
+  return { height, minHeight, maxHeight, overflowY };
 }