GroupsBreadcrumb.vue

<template>
  <nav aria-label="breadcrumb">
    <ol class="breadcrumb">
      <li class="breadcrumb-item" v-for="group in groups" v-bind:class="{ active: group.active }">
        <a href="#" v-on:click="changeBreadcrumb(group.groupId)" v-if="!group.active">{{group.groupName}}</a>
        <span v-if="group.active">{{group.groupName}}</span>
      </li>
    </ol>
  </nav>
</template>

<script>
import { mapState } from 'vuex';

function buildItems(values) {
  let groups = [];

  for(let i = 0; i < values.length; i++) {
    let group = values[i];
    group.active = false;
    groups.push(group);
  }

  // Activate the last item
  groups[groups.length - 1].active = true;

  return groups;
}

export default {
  name: 'GroupsBreadcrumb',
  computed: mapState({
    model: state => state.model,
    groups: state => buildItems(state.model.breadcrumbs)
  }),
  methods: {
    changeBreadcrumb: function(groupId) {
      this.$store.state.input.selectedGroupId = groupId;
      this.$store.commit('fetchGroupsModel');
    }
  }
}
</script>

<style scoped>
nav {
  margin-top: 10px;
}
</style>