[Bug Report] active slot prop of v-list-item not set on mount

Environment

Vuetify Version: 2.4.9 Vue Version: 2.6.11 Browsers: Chrome 89.0.4389.114 OS: Mac OS 11.2.3

Steps to reproduce

You first need a router with some route setup. Then, you need some list items with the ‘to’ prop set to one of the routes each. The list items must be inside a list item group.

Expected Behavior

The active slot prop of <v-list-item> and the value of <v-list-item-group> should be set at mount according to the current route

Actual Behavior

The active slot prop of <v-list-item> and the value of <v-list-item-group> are only set when an item is set

Reproduction Link

https://codepen.io/guillaumedemoff/pen/dyNZaVe

Other comments

We can see that at mount, the active class is set to the correct item of the list, Page 1 in the codePen. It would make sense to have the prop and value that match that.

[Guillaumedemoff]

The bug is that the value is not set. In the codePen, you can see that the active value is false for all three items. It should be true for the first one. The value of the item group, displayed above the list, is also null but should be 0.

I don’t think there is a scenario where we wouldn’t want the value to be set. I think that it makes more sense for the values to match what is actually displayed

[henon]

Having the same issue with v-list-item-group, namely that the active parameter of v-list-item’s default slot is not changing.

@Guillaumedemoff what is the state of this? Did you PR? Not seeing a linked pull request.