In vue3 composition API, how do you define emits with members?
Example

<MyComponent @someEvent.customMember="onHandler_1">

I’ve seen this in other libraries, but I’m not sure how its implemented. Maybe I’m searching for an example using the wrong key terms, but I can’t find any reference.

The event itself is defined:

defineEmits({
  'someEvent': null
})

Not sure how you get the dot notation.