SOURCE

new Vue({
  el: '#app',
  data: {
    show: true
  }
});

<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>


<div id="app">
  <p v-if="show"> You can see me !</p>
  <p v-else> Now you can see me !</p>
  <template v-if="show">
    <h1>h1</h1>
    <p>inside a template</p>
  </template>
  <p v-show="show"> Do you also see me ?</p>
  <button @click="show = !show">Switch</button>
</div>