Version

3.2.11

Reproduction link

sfc.vuejs.org/

Steps to reproduce

interface Option {
    value: unknown;
    text: string;
}

const optionsProptype: PropType<string[]> | PropType<number[]> | PropType<Option[]> = Array;
// const selectedProptype = [String, Number, Object]; <-- this works
// const selectedProptype = [String, Number, Object] as const; <-- Doesn't work but not a big deal. Wanted to mention it anyways.
const selectedProptype = [String, Number, Object as PropType<Option>];

export default defineComponent({
    props: {
        options: {
            type: optionsProptype,
            required: true,
        },
        modelValue: { // <---- ERROR: No overload matches this call. The last overload gave the following error. ts(2769)
            type: selectedProptype,
            required: true,
        },
    },
});

What is expected?

No error

What is actually happening?

ERROR: No overload matches this call. The last overload gave the following error. ts(2769)

const selectedProptype = [String, Number, Object] as as PropType<string | number | Option>;

Please, next time consider using the forum, the Discord server or StackOverflow for questions first. But feel free to come back and open an issue if it turns out to be a bug 🙂

Does this mean that

const optionsProptype: PropType<string[] | number[] | Option[]> = Array;

is more correct than

const optionsProptype: PropType<string[]> | PropType<number[]> | PropType<Option[]> = Array;

?

Should definitely be mentioned in the docs imho.

No, I would say those two are equivalent in my (non-expert) understanding of TS. The second one is just unnecessarily verbose.