App.vue
CompOne.vue
CompTwo.vue
main.js
 
<template>
  <h1>Transition with Dynamic Components</h1>
  <p>The Transition component wraps around the dynamic component so that the switching can be animated.</p>
  <button @click="toggleValue = !toggleValue">Switch component</button>
  <Transition mode="out-in">
    <component :is="activeComp"></component>
  </Transition>
</template>

<script>
  export default {
    data () {
      return {
        toggleValue: true
      }
    },
    computed: {
      activeComp() {
        if(this.toggleValue) {
          return 'comp-one'
        }
        else {
          return 'comp-two'
        }
      }
    }
  }
</script>

<style>
  .v-enter-active {
    animation: slideIn 0.5s;
  }
  @keyframes slideIn {
    from {
      translate: -200px 0;
      opacity: 0;
    }
    to {
      translate: 0 0;
      opacity: 1;
    }
  }
  .v-leave-active {
    animation: slideOut 0.5s;
  }
  @keyframes slideOut {
    from {
      translate: 0 0;
      opacity: 1;
    }
    to {
      translate: 200px 0;
      opacity: 0;
    }
  }
  #app {
    width: 350px;
    margin: 10px;
  }
  #app > div {
    border: solid black 2px;
    padding: 10px;
    margin-top: 10px;
  }
</style>                  
<template>
    <div>
        <h2>One!</h2>
        <p>This is component one.</p>
    </div>
</template>

<script></script>

<style scoped>
    div {
        background-color: lightgreen;
    }
</style>                  
<template>
    <div>
        <h2>Two!</h2>
        <p>This is component two.</p>
    </div>
</template>

<script></script>

<style scoped>
    div {
        background-color: lightpink;
    }
</style>                  
import { createApp } from 'vue'

import App from './App.vue'
import CompOne from './components/CompOne.vue'
import CompTwo from './components/CompTwo.vue'

const app = createApp(App)
app.component('comp-one', CompOne)
app.component('comp-two', CompTwo)
app.mount('#app')
                  
http://localhost:5173/