Cascading vue props

App.vue

<!-- FILE: App.vue -->
<!-- NOTE: Import bootstrap on main.js  -->

<template>
  <div id="app">
    <bootsCard v-bind="{ cardT : cardTitle, alertD:alertData }"/>
  </div>
</template>

<script>
import bootsCard from './components/bootsCard.vue'

export default {
  name: 'App',
  components: {
    bootsCard
  },
  data() {
      return {
        cardTitle: 'Very Important Title',
        alertData: 'Danger Will Robinson'
      }
    }
}
</script>

<style>
#app {
  font-family: Avenir, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-align: center;
  color: #2c3e50;
  margin-top: 60px;
}
</style>

bootsCard.vue

<!-- FILE: components/bootsCard.vue -->

<template>
  <div class="card" style="margin:auto;width:600px;">
    <div class="card-header">
      {{cardT}}
    </div>
      <bootsAlert v-bind="{ alertD }"/>
  </div>
</template>

<script>
import bootsAlert from './bootsAlert.vue'
export default {
  props: ['cardT', 'alertD'],
  name: 'bootsCard',
  components: {
    bootsAlert
  }
}
</script>

bootzAlert.vue

<!-- FILE: components/bootAlert.vue -->

<template>
  <div>
    <br>
      <div class="alert alert-danger" role="alert" style="margin:auto;width:400px;">
        {{alertD}}
    </div>
    <br>
  </div>
</template>

<script>

export default {
  props: ['alertD'],
  name: 'bootsAlert'
}
</script>