From e8f0e8b335d3f65fddc31dde135388e8cdb523c2 Mon Sep 17 00:00:00 2001
From: Hyunbin Seo <47051820+hyunbinseo@users.noreply.github.com>
Date: Tue, 27 May 2025 13:20:24 +0900
Subject: [PATCH] fix: narrow `defaultChecked` to boolean

---
 .changeset/mean-taxis-yell.md | 5 +++++
 packages/svelte/elements.d.ts | 4 ++--
 2 files changed, 7 insertions(+), 2 deletions(-)
 create mode 100644 .changeset/mean-taxis-yell.md

diff --git a/.changeset/mean-taxis-yell.md b/.changeset/mean-taxis-yell.md
new file mode 100644
index 0000000000..84528132b9
--- /dev/null
+++ b/.changeset/mean-taxis-yell.md
@@ -0,0 +1,5 @@
+---
+'svelte': patch
+---
+
+narrow `defaultChecked` to boolean
diff --git a/packages/svelte/elements.d.ts b/packages/svelte/elements.d.ts
index 71f28b4f97..0172b0e358 100644
--- a/packages/svelte/elements.d.ts
+++ b/packages/svelte/elements.d.ts
@@ -1115,8 +1115,8 @@ export interface HTMLInputAttributes extends HTMLAttributes<HTMLInputElement> {
 	// needs both casing variants because language tools does lowercase names of non-shorthand attributes
 	defaultValue?: any;
 	defaultvalue?: any;
-	defaultChecked?: any;
-	defaultchecked?: any;
+	defaultChecked?: boolean | undefined | null;
+	defaultchecked?: boolean | undefined | null;
 	width?: number | string | undefined | null;
 	webkitdirectory?: boolean | undefined | null;