App.vue
InfoBox.vue
GrandChild.vue
main.js
 
<template>
  <h2>Example $props Object</h2>
  <p>Name: <input type="text" v-model="name" placeholder="Your name here.."></p>
  <p> Bag weight (kg): <input type="range" v-model="weight" max="25" min="0"></p>
  <info-box v-bind:bag-owner=name v-bind:bag-weight=weight />
</template>

<script>
export default {
  data() {
    return {
      name: null,
      weight: null
    }
  }
}
</script>                  
<template>
  <div>
    <h3>InfoBox.vue</h3>
    <p>This is the $props object that is received from App.vue and passed down to the next child component:</p>
    <pre>{{ this.$props }}</pre>
    <grand-child v-bind="$props" />
  </div>
</template>

<script>
export default {
  props: [
    'bagOwner',
    'bagWeight'
  ]
}
</script>

<style scoped>
div {
  border: solid black 1px;
  padding: 10px;
  margin-top: 20px;
  max-width: 370px;
}
</style>                  
<template>
  <div>
    <h4>Grand Child Component</h4>
    <p v-if="$props.bagOwner">Your name is <span>{{ $props.bagOwner }}</span>.</p>
    <p v-if="$props.bagWeight">Your bag weighs <span>{{ $props.bagWeight }}</span> kg.</p>
  </div>
</template>

<script>
export default {
  props: [
    'bagOwner',
    'bagWeight'
  ]
}
</script>

<style scoped>
div {
  border: solid black 1px;
  padding: 10px;
  max-width: 250px;
  box-sizing: border-box;
}
span {
  background-color: lightgreen;
  padding: 0 10px;
}
</style>                  
import { createApp } from 'vue'

import App from './App.vue'
import InfoBox from './components/InfoBox.vue'
import GrandChild from './components/GrandChild.vue'

const app = createApp(App)
app.component('info-box', InfoBox)
app.component('grand-child', GrandChild)
app.mount('#app')
                  
http://localhost:5173/