Vue - Official extension or vue-tsc version

2.2.6

VSCode version

1.97.2

Vue version

3.5.13

TypeScript version

5.7.3

System Info

package.json dependencies

Steps to reproduce

Create a SFC with a v-model that accepts different types, such as:

const model = defineModel<string | number>({
    required: true,
});

Then use the component:

const testValue = ref("Hello, World")

<MyComponent v-model="testValue" />

What is expected?

Given the following is valid TS:

let test:string | number = "test"
test = 8;

There should be no TypeScript errors.

What is actually happening?

The following error is being displayed in VSCode:

Type 'string | number' is not assignable to type 'string'.
  Type 'number' is not assignable to type 'string'. ts-plugin(2322)

Link to minimal reproduction

https://github.com/richmason/vue-ts-issue

Any additional comments?

This was not an issue in version 2.2.4