Issue with Sveltekit and ISR on Vercel

[psntr]

Hi,

For a projet we are deploying our app on Vercel. We wanted to take advantage of the ISR function that Vercel offers with Sveltekit. But it seems that's not possible to make it work unless the we add the [[lang]] folder route.

In general we prefer to keep the lang in the URL, so prefixing the language has been set already via prefixDefaultLanguage: "always" in /src/lib/i18n.js. Is there a reason we shouldn't use the [[lang]] folder in first place?

A note, as said earlier, if we don't have the lang folder, the website returns an error 500.

[LorisSigrist]

There currently is an issue with SvelteKit's reroute hook that's messing up vercel deployments. sveltejs/kit#11879

Is there a reason we shouldn't use the [[lang]] folder in first place?

There isn't a technical reason, it's just nicer to not have it.

[psntr]

Thank Loris for the quick answer, really appreciated. On that note, should I temporarily removed the hook.js which contains the reroute function and used the [[lang]] in the meantime?

[LorisSigrist]

That should work as long as you aren't using the pathnames option.
I'll add a section to the docs recommending that workaround on vercel