Are conditional slots possible?

Question

Vue.js

Goodnight.
I want to render a slot if and only if one of the properties (item in the table) will have child entities (I'm making a tree table). Actually, the problem is that I need to get the data that is transferred to the slot, and based on this data, perform a check. But it doesn't work like that, Vue writes that item is not defined.

<v-data-table>
   <template v-if="check(item)" v-slot:item.data-table-expand="{ item }">
      <span >test</span>
    </template>
</v-data-table>

At the same time, transferring the condition to the body of the slot does not give what I want at all. I need my content to be shown under certain conditions, and defaulted under all other conditions. I also tried to find a way to get (or somehow force the use of) this very default content - I did not find such a feature. Although earlier, as I can tell by stack overflow, conditional slots worked - the old syntax with slot-scope allowed. The new syntax apparently no longer allows.
Is it possible to implement this, and if so, how?

Answer 1

Perhaps this will help