u can use v-if and v-else both. like this:

<q-tabs class="fit" color="indigo" inverted swipeable v-model="selectedTab"  v-if="views.length" v-show="views.length" >
      <q-tab :name="v[0]" slot="title" v-for="v in views" :key="v[0]">{{v[1]}}</q-tab>
      <q-tab-pane class="fit no-padding" :name="v[0]" v-for="v in views" :key="v[0]" ref="panes">
        <instance-view :id="id" :vid="v[0]" :modal="modal"/>
      </q-tab-pane>
    </q-tabs>

@peppicus u can use v-if and v-else both. like this:

<q-tabs class="fit" color="indigo" inverted swipeable v-model="selectedTab"  v-if="views.length" v-show="views.length" >
      <q-tab :name="v[0]" slot="title" v-for="v in views" :key="v[0]">{{v[1]}}</q-tab>
      <q-tab-pane class="fit no-padding" :name="v[0]" v-for="v in views" :key="v[0]" ref="panes">
        <instance-view :id="id" :vid="v[0]" :modal="modal"/>
      </q-tab-pane>
    </q-tabs>