Svelte Kit SSG with dynamic routes on Github Pages

These are the steps I followed to deploy my Svelte website to GitHub Pages:

npm create svelte@latest svelte-test
cd svelte-test
pnpm i
pnpm i -D @sveltejs/adapter-static

then proceeded to create an empty .nojekyll file in the static folder and a +layout.ts file inside of src/routes with the following content:

export const prerender = true;

then I modified the svelte.config.js file as follows:

import adapter from '@sveltejs/adapter-static';
import { vitePreprocess } from '@sveltejs/kit/vite';

const dev = process.argv.includes('dev');

/** @type {import('@sveltejs/kit').Config} */
const config = {
    preprocess: vitePreprocess(),

    kit: {
        adapter: adapter({
            pages: 'build',
            assets: 'build',
            fallback: undefined,
            precompress: false,
            strict: true
        }),
        paths: {
            base: dev ? '' : process.env.BASE_PATH,
        }
    }
};

export default config;

finally, I copied the deploy script from the Svelte documentation, set up the deployment from GitHub actions and I have my static website.

Now I'd like to have a dynamic route that shows different content based on the data I have on my db.

So I created the /[book]/

As long as Svelte can detect a static link to the dynamic page route in another page (e.g. <a href="{base}/fahrenheit-451/1">Fahrenheit 451</a>) everything works fine.

However, if the link to that page is dynamic (e.g. I get the data from my db and I create the link based on that) once I get to the page if I refresh the page I get a 404 file not found error.

Reading Svelte's documentation, the only solution I found is to use entries.

The downside is, if I understand correctly, that if the data in my db changes quite often, I will keep having the same issue on new and modified pages.

Is there a better solution to this problem or am I forced to use another adapter?

You are supposed to use the fallback option of the adapter for dynamic routes; set it to '404.html'. (Not sure how well it can coexist with static routes, though. The docs state that it is for SPA mode.)

The file will be returned by GitHub pages if no static file exists and SvelteKit will determine the route/parameters and load/execute the correct JS code.