Very sparse. How does that interact with Nuxt's own trailingSlash option? Does it apply to all routes or only those handled by i18n?

I agree the description is lacking, still need to familiarize myself with the routing logic more so I can't answer those questions yet! I figured this is still better than leaving it undocumented 😅..

The code it uses is ported from your code in v7 to vue-i18n-routing, unless it has changed a lot, you may be better able to answer those questions than I am.

Version 7 of this module (for Nuxt 2) doesn't use vue-i18n-routing so I'm not familiar with it.

I'm a bit surprised that trailingSlash option was introduced in context of Nuxt module since IMO this should all be controlled through Nuxt's own setting instead of having two, potentially conflicting, options.

I understand that v7 doesn't use vue-i18n-routing, it's vue-i18n-routing that is based on routing in v7.

As far as I can tell, the reason for configuring it in the module is because Nuxt 3 got rid of the trailingSlash option. Now it's up to users to create a custom NuxtLink component see: https://nuxt.com/docs/api/components/nuxt-link#overwriting-defaults.

Though 3.8 introduced a way to set these NuxtLink defaults in the nuxt config, so we could consider using that config.

Also not sure what happens if users have multiple custom NuxtLink components with different trailingSlash settings, when and why this would be used, and how we would handle such edge cases 🤷‍♂️.

I see. Then maybe it's just the way to go and I'm making unnecessary noise.

If you follow the history in blame, you can find this github issue.
nuxt/nuxt#18806

That issue is added by NuxtLink to improve SEO for internal links.

Follow the issue further and you can find this issue.
nuxt/nuxt#15462

That issue is a proposal to support trailing Slash from Nuxt 2.
https://v2.nuxt.com/docs/configuration-glossary/configuration-router#trailingslash

As you can see from reading the issue, there are several ways we plan to improve trailing Slash, and the trailing Slash support added to NuxtLink appears to be one of them.

nuxt/nuxt#15462 (comment)

As far as I can understand from reading the issue, Nuxt's policy is to support trailing slashes only at the minimum, and other cases will be handled in userland.

So I think it makes sense to provide a tranilingSlash option in nuxt i18n.

/cc @manniL @danielroe
if you have anything to additional comment, please comment.

As far as I can understand from reading the issue, Nuxt's policy is to support trailing slashes only at the minimum, and other cases will be handled in userland.

That's correct. We leave that up to the user (either via defineNuxtLink + options, or via setting defaults for the NuxtLink in the nuxt.config.ts) ☺️

I wonder what trailingSlash would necessarily do in the module (compared to setting it via above mentioned options)

I wonder what trailingSlash would necessarily do in the module (compared to setting it via above mentioned options)

It influences head tags, the generated routes and the way routes are matched and resolved if I understand correctly.

I will be looking into the use of this option, where it is being used and why, and if its usage can be reduced so it won't conflict with the flexible nature of trailingSlash prop of NuxtLink (if it does). We will probably support setting this option in the future via https://github.com/harlan-zw/nuxt-site-config as well (related #2474).

Let's not get distracted, this PR only (barely) documents an old option, motivation behind it is because someone on Discord asked how to enable trailing slashes in this module and enabling this option satisfied their use case.

Just trying to prevent issues as they pour in 😅..