sveltekit

Use a load function in +page.ts for universal loading or +page.server.ts for server-only loading. The returned data is passed to the page component as a typed data prop using the generated PageData type.

Create a +server.ts file inside a route directory and export HTTP method handlers like GET or POST typed as RequestHandler. Use the json helper from @sveltejs/kit to return responses with appropriate status codes.

+page.ts runs on both server and client during navigation, while +page.server.ts runs exclusively on the server. Use the server variant for database queries, secrets, and auth logic that must never ship to the browser.

The locals object is only populated if you set it in src/hooks.server.ts before calling resolve(). Add a handle function that reads the session cookie and assigns the verified user to event.locals.

Form actions require redirect(303, '/path') from @sveltejs/kit rather than a plain return statement. The 303 status is required for POST redirects so the browser issues a GET request to the target.

Yes, export prerender, ssr, and csr constants from a page's load file to control rendering per route. Setting prerender to true generates the page at build time, while ssr false disables server rendering.