From 654a207b1f4c19929b05f95f6302eec2c6a3ab5b Mon Sep 17 00:00:00 2001
From: Simon Holthausen <simon.holthausen@vercel.com>
Date: Tue, 10 Feb 2026 23:35:16 +0100
Subject: [PATCH] fix

---
 packages/svelte/src/internal/client/render.js |  2 +-
 packages/svelte/src/server/index.d.ts         | 34 +++++++++---------
 packages/svelte/types/index.d.ts              | 36 +++++++++----------
 3 files changed, 36 insertions(+), 36 deletions(-)

diff --git a/packages/svelte/src/internal/client/render.js b/packages/svelte/src/internal/client/render.js
index 8be0edd25c..bc2c1d15b7 100644
--- a/packages/svelte/src/internal/client/render.js
+++ b/packages/svelte/src/internal/client/render.js
@@ -89,7 +89,7 @@ export function mount(component, options) {
  *  	context?: Map<any, any>;
  * 		intro?: boolean;
  * 		recover?: boolean;
- *		onerror: (error: unknown) => unknown;
+ *		onerror?: (error: unknown) => unknown;
  * 	}} options
  * @returns {Exports}
  */
diff --git a/packages/svelte/src/server/index.d.ts b/packages/svelte/src/server/index.d.ts
index 5450745414..34e0a539bf 100644
--- a/packages/svelte/src/server/index.d.ts
+++ b/packages/svelte/src/server/index.d.ts
@@ -12,22 +12,22 @@ export function render<
 	...args: {} extends Props
 		? [
 				component: Comp extends SvelteComponent<any> ? ComponentType<Comp> : Comp,
-			options?: {
-				props?: Omit<Props, '$$slots' | '$$events'>;
-				context?: Map<any, any>;
-				idPrefix?: string;
-				csp?: Csp;
-				onerror?: (error: unknown) => unknown | Promise<unknown>;
-			}
-		]
-	: [
-			component: Comp extends SvelteComponent<any> ? ComponentType<Comp> : Comp,
-			options: {
-				props: Omit<Props, '$$slots' | '$$events'>;
-				context?: Map<any, any>;
-				idPrefix?: string;
-				csp?: Csp;
-				onerror?: (error: unknown) => unknown | Promise<unknown>;
-			}
+				options?: {
+					props?: Omit<Props, '$$slots' | '$$events'>;
+					context?: Map<any, any>;
+					idPrefix?: string;
+					csp?: Csp;
+					onerror?: (error: unknown) => unknown | Promise<unknown>;
+				}
+			]
+		: [
+				component: Comp extends SvelteComponent<any> ? ComponentType<Comp> : Comp,
+				options: {
+					props: Omit<Props, '$$slots' | '$$events'>;
+					context?: Map<any, any>;
+					idPrefix?: string;
+					csp?: Csp;
+					onerror?: (error: unknown) => unknown | Promise<unknown>;
+				}
 			]
 ): RenderOutput;
diff --git a/packages/svelte/types/index.d.ts b/packages/svelte/types/index.d.ts
index c1f77aaefe..347466bc26 100644
--- a/packages/svelte/types/index.d.ts
+++ b/packages/svelte/types/index.d.ts
@@ -555,7 +555,7 @@ declare module 'svelte' {
 		context?: Map<any, any>;
 		intro?: boolean;
 		recover?: boolean;
-		onerror: (error: unknown) => unknown;
+		onerror?: (error: unknown) => unknown;
 	}): Exports;
 	/**
 	 * Unmounts a component that was previously mounted using `mount` or `hydrate`.
@@ -2562,23 +2562,23 @@ declare module 'svelte/server' {
 		...args: {} extends Props
 			? [
 					component: Comp extends SvelteComponent<any> ? ComponentType<Comp> : Comp,
-				options?: {
-					props?: Omit<Props, '$$slots' | '$$events'>;
-					context?: Map<any, any>;
-					idPrefix?: string;
-					csp?: Csp;
-					onerror?: (error: unknown) => unknown | Promise<unknown>;
-				}
-			]
-		: [
-				component: Comp extends SvelteComponent<any> ? ComponentType<Comp> : Comp,
-				options: {
-					props: Omit<Props, '$$slots' | '$$events'>;
-					context?: Map<any, any>;
-					idPrefix?: string;
-					csp?: Csp;
-					onerror?: (error: unknown) => unknown | Promise<unknown>;
-				}
+					options?: {
+						props?: Omit<Props, '$$slots' | '$$events'>;
+						context?: Map<any, any>;
+						idPrefix?: string;
+						csp?: Csp;
+						onerror?: (error: unknown) => unknown | Promise<unknown>;
+					}
+				]
+			: [
+					component: Comp extends SvelteComponent<any> ? ComponentType<Comp> : Comp,
+					options: {
+						props: Omit<Props, '$$slots' | '$$events'>;
+						context?: Map<any, any>;
+						idPrefix?: string;
+						csp?: Csp;
+						onerror?: (error: unknown) => unknown | Promise<unknown>;
+					}
 				]
 	): RenderOutput;
 	type Csp = { nonce?: string; hash?: boolean };