Improve PropType Function

[hareku]

What problem does this feature solve?

A TypeScript error occures on this example code.

import { defineComponent, PropType } from 'vue'

export default defineComponent({
  props: {
    categories: {
    onSelect: {
      type: Function as PropType<(val: number) => void>, // TypeScript Error
      required: true
    }
  }
})

Conversion of type 'FunctionConstructor' to type 'PropType<(val: number) => void>' may be a mistake because neither type sufficiently overlaps with the other. If this was intentional, convert the expression to 'unknown' first.

We have to write with as unknown, but I feel this is redundant.

Function as unknown as PropType<(val: number) => void> //work as well

What does the proposed API look like?

Function as PropType<(val: number) => void>