Thank you @s-molinari , that was a great idea:
<q-table class="q-pa-md" title="Notes" :data="allNotes" :columns="columns" row-key="filename" @row-click="displayNote" > <template v-slot:body="props"> <q-tr :props="props"> <q-td key="title" :props="props"> {{ props.row.title }} </q-td> <q-td key="tags" :props="props"> <span v-for="tag in props.row.tags"><q-badge color="blue" class="q-ma-sm">{{tag}}</q-badge></span> </q-td> </q-tr> </template> </q-table>