vue-tsc removing comments in defineProps when used with withDefaults

[soulsam480]

hii @johnsoncodehk , I noticed it today that when I use vue-tsc to emit declarations for vue components, it doesn't remove comments when the props are declared without withDefaults. When I wrap defineProps inside withDefaults it removes comments.

steps to reproduce

• clone https://github.com/soulsam480/vue-chart
• run npm run build:lib
• check lib/dist/components
• You won't see any comments inside the generated declarations

Let me know if you need more clarity.

[johnsoncodehk]

I think TS can't keep props comments in this situation. You can try to build the vanilla TS script:

// foo.ts
export default defineComponent({
  props: {
    /**
     * a foo
     */
    foo: String
  }
})

[johnsoncodehk]

Fixed by vuejs/core#5871.