How to use static-adapter with partial CSR for dynamic routes?

[HuakunShen]

For my use case, I have to have a static site, so I believe the static-adapter is the only choice.
In the app /store lists a list of items fetched from database (dynamic), to will goto() /store/[id] when an item is selected.
The app should fetch data from database and render the [id] page. These are all dynamic, and I don't expect them to be pre-renderred.

Another route is /settings and is expected to be pre-renderred.

I couldn't figure out how to do this.
Error I get looks like this

Error: The following routes were marked as prerenderable, but were not prerendered because they were not found while crawling your app:
  - /store/[id]

I've tried to set export const csr=true in /store/[id]/+page.ts and /store/[id]/+layout.ts but don't seem to work.
The only option to get the app built is by setting fallback: "index.html" in config, but this seems to turn the entire app into a CSR SPA and I don't want this.

Is there a way to pre-render some pages and make some pages CSR?

[brunnerh]

fallback usually should be '404.html', which then should automatically be served if no pre-rendered route is found (at least most file servers support this sort of thing). And yes, those routes need CSR without pre-rendering if not all possible IDs are known and specified beforehand.

[HuakunShen]

It doesn't seem to work for me.

Other than this file, the only place I have a render mode setting is the +layout.ts in root routes folder.

export const prerender = true
export const ssr = false

[brunnerh]

Did you set the fallback as well?

[HuakunShen]

No I didn't se fallback, should I set it to 'index.html`? I thought it will turn the entire app into CSR SPA (including other pages).

[brunnerh]

As far as I know , it should not do that, and as I said, it usually should be '404.html' so it is served for routes that are not found (because they did not get pre-rendered).

[HuakunShen]

Thank you I got it working!
I saw in the docs https://svelte.dev/docs/kit/adapter-static#Options-fallback that index.html, 404.html, 200.html

I tried them and they work the same way.
Thank you again!