Using Scoped Slots in Vue.js to Abstract Functionality | CSS-Tricks
In the above example, this console will log out ["this_is_not_scoped_slots"] ... I believe the new slot syntax was implemented this way to allow for easier migration to Vue 3.
Slots in Vue 3 Deep Dive - enterprisevue.dev
It would be ideal if Vue added defineComponent<Slots, Props> version of defineComponent that would validate my Slots and Props interfaces.
How to use slot scope correctly within vuejs 2.5.x?
In this example, the author uses vue-test-utils but I think you can try to add a slots property in your constructor. Source : alexjoverm.github.io/2017/10/02/Test-Vue-js-Slots-in-Jest/….