Vue version

3.3.4

Link to minimal reproduction

https://stackblitz.com/edit/vitejs-vite-ftw1xc?file=src%2FApp.vue

Steps to reproduce

Click the button in the example to see this(点击例子中按钮可以直接看到).

What is expected?

In your custom component, the type of 'ev.detail' should be the same as the type of the second argument to 'emit'（在自定义组件中，ev.detail 的类型应该和 emit 第二参数的类型一样）

What is actually happening?

The type of value passed in the 'emit' is different from the type of the 'ev.detail' that fired the custom event（emit 中传的值的类型与触发自定义事件中 ev.detail 的类型不同。）

System Info

No response

Any additional comments?

this is by design. see docs

Is there any meaning in this design?

https://vuejs.org/api/component-instance.html#emit

interface ComponentPublicInstance {
  $emit(event: string, ...args: any[]): void
}

$emit accepts multiple arguments.