SvelteKit Remote Functions

Quick Start

File naming: *.remote.ts for remote function files

Which function? One-time action → command() | Repeated reads → query() | Forms → form()

Example

// actions.remote.ts
import { command } from '$app/server';
import * as v from 'valibot';

export const delete_user = command(v.object({ id: v.string() }), async ({ id }) => {
	await db.users.delete(id);
	return { success: true };
});

// Call from client: await delete_user({ id: '123' });

Reference Files

• •references/remote-functions.md - Complete guide with all patterns

Notes

• •Remote functions execute on server when called from browser
• •Args/returns must be JSON-serializable
• •Schema validation via StandardSchemaV1 (Valibot/Zod)
• •getRequestEvent() available for cookies/headers access
• •In components: Use <svelte:boundary> + {@const await} (no flicker)
• •Refresh queries: Call query().refresh() - updates without flicker
• •Last verified: 2025-12-24