From 474c27e28d79794ac78d36e3384f0c0da6f2dfed Mon Sep 17 00:00:00 2001
From: Billy Baggerman
Date: Mon, 6 Jan 2025 14:42:21 -0500
Subject: Add instant behavior to synced tab scrolling (#2747)

Co-authored-by: Chris Swithinbank <swithinbank@gmail.com>
---
 .changeset/chilly-paws-smell.md               | 5 +++++
 packages/starlight/user-components/Tabs.astro | 1 +
 2 files changed, 6 insertions(+)
 create mode 100644 .changeset/chilly-paws-smell.md

diff --git a/.changeset/chilly-paws-smell.md b/.changeset/chilly-paws-smell.md
new file mode 100644
index 00000000..a7f3ea20
--- /dev/null
+++ b/.changeset/chilly-paws-smell.md
@@ -0,0 +1,5 @@
+---
+"@astrojs/starlight": patch
+---
+
+Ensures `<Tab>` component toggling is stable when smooth scrolling is enabled via custom CSS
diff --git a/packages/starlight/user-components/Tabs.astro b/packages/starlight/user-components/Tabs.astro
index 4234eb01..257174e1 100644
--- a/packages/starlight/user-components/Tabs.astro
+++ b/packages/starlight/user-components/Tabs.astro
@@ -224,6 +224,7 @@ if (isSynced) {
 				StarlightTabs.#syncTabs(this, newTab);
 				window.scrollTo({
 					top: window.scrollY + (this.getBoundingClientRect().top - previousTabsOffset),
+					behavior: 'instant',
 				});
 			}
 		}
-- 
cgit