use `svelte.config.ts` in `typescript` projects

[manuel3108]

See #812

[sacrosanctic]

Does this require a discussion, or can I proceed with the implementation?

[jycouet]

It's an option to have svelte.config.ts, I mean, it's working.
But do we want that in our templates/recommandations? (I like ts, but I ike a lot the current config!)

[sacrosanctic]

whoops, I jumped the gun. But I also included other minor tweaks. So just let me know, and I can remove the svelte.config.ts changes.

[jycouet]

Yeah, I think I would not do it. And it's mainly in packages/create/templates/minimal/vite.config.js and other templates.

Should we close until people request this and re-evaluate?

[manuel3108]

Not sure! Let's ask @dominikg as he was the person who added support for this (I think). Are there any gotchas when using svelte.config.ts? Was there a node version requirement or something? What do you think?

[sacrosanctic]

Here's the original PR. But it's only the implementation. The discussion happened internally. The language tool currently doesn't support it.

[dummdidumm]

This also needs to work with language tools, other plugins etc, so we shouldn't make this change unless we ensured it works for all of them

[dominikg]

kit and vite-plugin-svelte support it, eslint, prettier plugins, language tools vscode ext, intellij and others might not yet.

my PR in language tools is lacking a test and there is an open question regarding config resolution. if anyone wants to take over be my guest.

[dominikg]

and yes it only works in nodejs that has type stripping enabled

[manuel3108]

Thanks for all the input. Given those constraints, I thinks it's too early to do this now.