<component :is="componentName"></component>

import Vue from 'vue'
import VueRouter from 'vue-router'
import Parent from '../components/Parent'
 
Vue.use(VueRouter)
 
const routes = [
  {
    path: '/',
    name: 'Parent',
    component: Parent
  }
]
 
const router = new VueRouter({
  routes
})
 
export default router

<template>
  <div class="outer">
    <h2>這是父組件</h2>
    <component :is="componentName" :propA="propAValue"></component>
  </div>
</template>
 
<script>
import ChildA from './ChildA'
import ChildB from './ChildB'
 
export default {
  name: 'Parent',
  components: { ChildA, ChildB },
  data () {
    return {
      componentName: 'ChildB',
      propAValue: 'aaa'
    }
  }
}
</script>
 
<style scoped>
.outer {
  margin: 20px;
  border: 2px solid red;
  padding: 20px;
}
</style>

<template>
  <div class="outer">
    <h3>這是ChildA</h3>
    <div>傳入進(jìn)來(lái)的propA值為：{{propA}}</div>
  </div>
</template>
 
<script>
export default {
  name: 'ChildA',
  props: ['propA']
}
</script>
 
<style scoped>
.outer {
  margin: 20px;
  border: 2px solid blue;
  padding: 20px;
}
</style>

<template>
  <div class="outer">
    <h3>這是ChildB</h3>
    <div>傳入進(jìn)來(lái)的propA值為：{{propA}}</div>
  </div>
</template>
 
<script>
export default {
  name: 'ChildB',
  props: ['propA']
}
</script>
 
<style scoped>
.outer {
  margin: 20px;
  border: 2px solid blue;
  padding: 20px;
}
</style>