Trigger error() in +page.server.ts

[jonaskohl]

I have a page with the paths [slug]/+page.svelte and [slug]/+page.server.ts. I also have a +error.svelte error page. Inside the +page.server.ts I'm fetching the page contents from a CMS. If the slug does not exist inside the CMS, I want to trigger a 404 page with error(404, "Not found"). But for some reason, the error call gets ignored completely.

Now, I've read that error() does not seem to be supported in *.server.ts files (which is only mentioned as a little disclaimer here: https://kit.svelte.dev/docs/load#errors and not at all here: https://kit.svelte.dev/docs/errors). What would be the best approach here?

(Note: I don't want to import tryFetchPageFromCMS into client code as I don't want to compile and leak CMS authentication details to the client.)

My +page.server.ts for reference:

import { tryFetchPageFromCMS } from "$lib/server/cms";
import { error } from "@sveltejs/kit";

export async function load({ params }) {
    const page = await tryFetchPageFromCMS(params.slug);
    if (!page) error(404, "Not found");
    return {
        page
    };
}

[david-plugge]

I'm sorry, but where did you take that information from? I can't find it anywhere.
error(...) works in every type of load function!

[jonaskohl]

This: https://kit.svelte.dev/docs/routing#error page mentions it briefly:

+error.svelte is not used when an error occurs inside handle or a +server.js request handler.