Why does rollup bundle devDependencies instead of dependencies?

[steve-taylor]

Pretty much what the title says. Why would things like typescript, eslint, vitest, etc., all of which should be devDependencies, be considered when bundling the app? Shouldn't rollup instead bundle packages that are in dependencies?

As it stands right now, in order to have some sort of deployable app, I have to swap my dependencies and devDependencies in my package.json which is just weird.

[eltigerchino]

It’s hard to say without a reproduction to look at. Also, SvelteKit doesn’t use rollup. Maybe it would be more helpful to ask in the rollup discussions?

EDIT: SvelteKit uses Vite which uses Rollup