render a default/fallback component until the main component fetches the data with Suspense in Vue.js 3

Suspense is a new feature that renders a default/fallback component until the main component fetches the data.

Sometimes we use async operations to fetch data from the server. Instead of handing the template with v-if and then setting it back when we return the data, Suspense does it for us.

Suspense can be used for both parts of the template, or the whole template:

<template>
  <Suspense>
    <template #default>
      <div v-for="item in articleList" :key="item.id">
        <article>
          <h2>{{ item.title }}</h2>
          <p>{{ item.body }}</p>
        </article>
      </div>
    </template>
    <template #fallback>
      Articles loading...
    </template>
  </Suspense>
</template>
<script>
import axios from 'axios'
export default {
  async setup() {
    let articleList = await axios
      .get('https://jsonplaceholder.typicode.com/posts')
      .then(response => {
        console.log(response)
        return response.data
      })
    return {
      articleList
    }
  }
}
</script>