From 8cfe998a17786ace2a19079feab8b24f42ecc896 Mon Sep 17 00:00:00 2001
From: Aaron Munger <aamunger@microsoft.com>
Date: Wed, 27 Mar 2024 09:33:27 -0700
Subject: [PATCH] check undefined, trackpad can send deltaYs of 0 (#208920)

---
 .../contrib/notebook/browser/view/renderers/webviewPreloads.ts  | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/vs/workbench/contrib/notebook/browser/view/renderers/webviewPreloads.ts b/src/vs/workbench/contrib/notebook/browser/view/renderers/webviewPreloads.ts
index 19f242d53dc7e..d8668490dae8d 100644
--- a/src/vs/workbench/contrib/notebook/browser/view/renderers/webviewPreloads.ts
+++ b/src/vs/workbench/contrib/notebook/browser/view/renderers/webviewPreloads.ts
@@ -561,7 +561,7 @@ async function webviewPreloads(ctx: PreloadContext) {
 	let lastTimeScrolled: number | undefined;
 	function flagRecentlyScrolled(node: Element, deltaY?: number) {
 		scrolledElement = node;
-		if (!deltaY) {
+		if (deltaY === undefined) {
 			lastTimeScrolled = Date.now();
 			previousDelta = undefined;
 			node.setAttribute('recentlyScrolled', 'true');