Plan.vue

<template>
  <div>
    <span class="Plan__name">{{ plan.name }}</span>
    <span class=Plan__price>{{ plan.price}}/month</span>
    <button @click=setActivePlan>Upgrade</button>
  </div>
</template>
<script>
export default {
  name: 'plan',
  methods: {
    setActivePlan: function () {
      this.active = this.plan
    }
  },
  props: ['plan', 'active']
}
</script>

<!-- Add "scoped" attribute to limit CSS to this component only -->
<style scoped>
h1, h2 {
  font-weight: normal;
}

ul {
  list-style-type: none;
  padding: 0;
}

li {
  display: inline-block;
  margin: 0 10px;
}

a {
  color: #42b983;
}
.Plan__name {
display: inline-block; min-width: 8rem; text-align: left;}
.Plan__price {display: inline-block; min-width: 8rem; text-align: left;}
 
</style>

Plans.vue

<template>
  <div>
    <pre>
{{ $data | json }}
</pre>
    <div v-for="plan in plans">
      <plan :plan="plan" :active.sync="active"></plan>
    </div>
  </div>
  </template>
<script>
import Plan from './Plan'

export default {
  name: 'plans',
  data () {
    return {
      plans: [
        { name: 'Enterprise', price: 100 },
        { name: 'Pro', price: 50 },
        { name: 'Personal', price: 10 },
        { name: 'Free', price: 0 }
      ],
      active: {}
    }
  },
  components: {
    Plan
  }
}
</script>

<!-- Add "scoped" attribute to limit CSS to this component only -->
<style scoped>
h1, h2 {
  font-weight: normal;
}

ul {
  list-style-type: none;
  padding: 0;
}

li {
  display: inline-block;
  margin: 0 10px;
}

a {
  color: #42b983;
}

 
</style>