svelte.config.ts – Svelte Config TS Support

[ScarletFlash]

Describe the problem

Overview of available config fields currently is only available from docs.

Describe the proposed solution

It would be great if we had build-in Interface, describes all available fields for config file.
Moreover, it would be great if we had build-in support for .ts-file extension for config files.

Alternatives considered

–

Importance

would make my life easier

Additional Information

No response

[dummdidumm]

This interface already exists, and the JSDoc at the top of the file which comes with the starter tepmlates should enable the type hints: /** @type {import('@sveltejs/kit').Config} */ . Adding .ts support for the config files is out of scope since it would require SvelteKit to also install TypeScript or some other form of TS-JS-transpiler for everyone, even if they don't use TS, and it adds additional maintenance overhead for a file that should be pretty simple anyway.

[michaeloliverx]

I was also searching for this feature because it is supported with vite:

Vite also directly supports TS config files. You can use vite.config.ts with the defineConfig helper as well.

Not essential but its nice to have, especially when you have local custom svelte preprocessors and vite plugins written in TS.