[FIX] A Collection defined with defineCollection causes a type error when included in defineConfig's collections.

[wontory]

Property '_cached' of exported class expression may not be private or protected.ts(4094)

If there are no Collections inside the collections of defineConfig, no error occurs.
However, if Collections are added, an error occurs.

This is my full source code of velite.config.ts.
And this code was written with reference to the velite.config.ts from Velite's taxonomy.

import { defineCollection, defineConfig, s } from 'velite'
import remarkGfm from 'remark-gfm'
import rehypeSlug from 'rehype-slug'
import rehypeAutolinkHeadings from 'rehype-autolink-headings'

const computedFields = <T extends { slug: string }>(data: T) => ({
  ...data,
  slugAsParams: data.slug.split('/').slice(1).join('/'),
})

const posts = defineCollection({
  name: 'Post',
  pattern: 'posts/**/*.mdx',
  schema: s
    .object({
      slug: s.path(),
      title: s.string().max(99),
      description: s.string().max(999).optional(),
      date: s.isodate(),
      published: s.boolean().default(true),
      image: s.image(),
      authors: s.array(s.string()),
      toc: s.toc(),
      body: s.mdx(),
    })
    .transform(computedFields),
})

const authors = defineCollection({
  name: 'Author',
  pattern: 'authors/**/*.mdx',
  schema: s
    .object({
      slug: s.path(),
      title: s.string().max(99),
      description: s.string().max(999).optional(),
      avatar: s.string().max(99),
      github: s.string().max(99),
      body: s.mdx(),
    })
    .transform(computedFields),
})

export default defineConfig({
  root: 'content',
  output: {
    data: '.velite',
    assets: 'public/static',
    base: '/static/',
    name: '[name]-[hash:6].[ext]',
    clean: true,
  },
  collections: { posts, authors },
  mdx: {
    remarkPlugins: [remarkGfm],
    rehypePlugins: [
      rehypeSlug,
      [
        rehypeAutolinkHeadings,
        {
          properties: {
            className: ['subheading-anchor'],
            ariaLabel: 'Link to section',
          },
        },
      ],
    ],
  },
})

[moltar]

@wontory I'm having the same issue. How did you resolve it? Thanks.

[wontory]

@wontory I'm having the same issue. How did you resolve it? Thanks.

@moltar
Are you using monorepo(like turborepo)?
Turborepo template's default tsconfig is causing error.

Try remove "declaration": true in tsconfig.json.

[moltar]

I'm using monorepo, and I do use turbo, but I do not use the default tsconfig.

I do have the "declaration": true enabled tho. I'll try without it.

I don't understand why it'd be causing the problem by itself? Can you please explain the reason you believe this causes the problem.

I think that optionjust tells tsc to create *.d.ts files on compile. Given that I use Remix & Vite bundler, I think there should be no declaration files anyways.

[wontory]

@moltar
I don't know the exact reason, but I think the link below can explain it.
Re-opening the issue.

Stack Overflow: Typescript allows to use proper multiple inheritance with mixins, but fails to create delcaration files

microsoft/TypeScript#30355