From c9fbef6438131cf358e2eaff3d866cf4398e622c Mon Sep 17 00:00:00 2001
From: Siddharth Kshetrapal <siddharthkp@github.com>
Date: Tue, 13 Feb 2024 17:13:08 +0100
Subject: [PATCH] ActionList: Prevent scroll when an item is selected with
 Space (#4259)

* prevent default on Space

* immediately reset defaultPrevented

* improve comment

* Create slow-owls-report.md
---
 .changeset/slow-owls-report.md         | 5 +++++
 packages/react/src/ActionList/Item.tsx | 6 ++++++
 2 files changed, 11 insertions(+)
 create mode 100644 .changeset/slow-owls-report.md

diff --git a/.changeset/slow-owls-report.md b/.changeset/slow-owls-report.md
new file mode 100644
index 00000000000..c572b98f1c2
--- /dev/null
+++ b/.changeset/slow-owls-report.md
@@ -0,0 +1,5 @@
+---
+"@primer/react": patch
+---
+
+ActionList: Prevent scroll when an item is selected with `Space`
diff --git a/packages/react/src/ActionList/Item.tsx b/packages/react/src/ActionList/Item.tsx
index a65a10372c6..ee6592210d7 100644
--- a/packages/react/src/ActionList/Item.tsx
+++ b/packages/react/src/ActionList/Item.tsx
@@ -229,6 +229,12 @@ export const Item = React.forwardRef<HTMLLIElement, ActionListItemProps>(
       (event: React.KeyboardEvent<HTMLLIElement>) => {
         if (disabled || inactive) return
         if ([' ', 'Enter'].includes(event.key)) {
+          if (event.key === ' ') {
+            event.preventDefault() // prevent scrolling on Space
+            // immediately reset defaultPrevented once it's job is done
+            // so as to not disturb the functions that use that event after this
+            event.defaultPrevented = false
+          }
           onSelect(event, afterSelect)
         }
       },