Missing file when using adapter/static as pwa with dynamic routes

[m1212e]

Hi,

I'm using the static adapter to generate static files for my app. I have a few dynamic routes. E.g. I have files/owned and files/shared which display a list of files. Since the code behind them is pretty similar and it is likely that there will be more filters in the future, I put those behind a dynamic route files/[filter]. I export an entries property to make Sveltekit aware of them so they get prerendered:

export const entries = (() => {
    return availableCategories().map(category => {
        return {filter: category}
    })
}) satisfies EntryGenerator;

This works great.
Now I want to make a dynamic route with an unknown amout of variations. E.g. filebrowser/[fileId]. To make the app build, I disabled the prerender option for this route: export const prerender = false;. The app builds and everything works fine if I navigate from any page in the app to my file browser, because the client side router handles everything. But when I navigate to my file browser as initial page visit (no client side router to handle and intercept the navigation) then the app breaks. Initially I thought this was due to some misconfiguration of the fallback page. I've set fallback: '200.html' in my adapter configuration and I serve the 200.html on every not found file. Now when I visit the page with my filebrowser as an entrypoint, I get a white screen. Looking into the network tab, I see only successful requests. My console says Uncaught (in promise) SyntaxError: JSON.parse: unexpected character at line 1 column 1 of the JSON data. I think this happens, because the browser requests filebrowser/1234/__data.json which does not exist and gets answered with my 200.html.

How do I fix this and what even is the __data.json I'm missing?

Thanks for your time & help!

[eltigerchino]

Can you provide an example repository?

[m1212e]

Sure: https://github.com/m1212e/svelte-kit-bug-demo-

To replicate, please install and build. Then run the provided server.cjs file to spin up a simple express server serving the build directory.
To trigger the error, navigate to /search/1234. This should log the parse error to the console.

I think it's caused by https://github.com/ivanhofer/typesafe-i18n but I can't figure out what is misconfigured. I followed their SvelteKit Tutorial. I don't really understand what the missing data.json does.

[eltigerchino]

I can't seem to replicate this. The page loads correctly for me.