Sử dụng Axios trong Vue CLI phiên bản mới nhất. Cách mà ta ưa dùng để lấy dữ liệu, cách mà Vue 3 xử lý các reactive variables nó sẽ khác so với Vue 2, ta cần cài đặt các biến ( reactive variables )  trong hàm setup()

Cài đặt axios : 

npm install axios

Dưới đây là cách mà ta gọi axios trong Vue

import { ref } from 'vue'
import axios from 'axios'
import { RouterLink } from 'vue-router'
export default {
  name: 'ProductView',
  setup() {
    const products = ref([])
    const count = ref(0)
    const getAllProducts = () => {
      axios.get('https://dummyjson.com/products').then((res) => {
        products.value = res.data.products
        console.log(products.value)
        count.value = products.value.length
      })
    }
   // call function
    getAllProducts()
    return {
      products,
      count
    }
  }
}

Nó sẽ trả về console.log như sau :

Ok, còn các reactive variables (products, count), muốn sử dụng nó, ta cần phải return {products, count) 

<template>
  <div class="w-full max-w-6xl m-auto">
    <h1 class="w-full font-bold uppercase text-xl text-gray-500 py-5 block">
      Products List of number {{ count }}
    </h1>
    <table class="w-full text-sm text-left text-gray-500">
      <thead class="text-xs text-gray-700 uppercase bg-gray-300">
        <tr>
          <th scope="col" class="px-6 py-3">ID</th>
          <th scope="col" class="px-6 py-3">Title</th>
          <th scope="col" class="px-6 py-3">Category</th>
          <th scope="col" class="px-6 py-3">Price</th>
          <th scope="col" class="px-6 py-3">Rating</th>
          <th scope="col" class="px-6 py-3">Stock</th>
          <th scope="col" class="px-6 py-3">Tags</th>

          <th scope="col" class="px-6 py-3">Modify</th>
        </tr>
      </thead>
      <tbody>
        <tr class="bg-white border-b" v-for="product in products" :key="product.id">
          <th scope="row" class="px-6 py-4 font-medium text-gray-900 whitespace-nowrap">
            {{ product.id }}
          </th>
          <td class="px-6 py-4">{{ product.title }}</td>
          <td class="px-6 py-4">{{ product.category }}</td>
          <td class="px-6 py-4">{{ product.price }}</td>
          <td class="px-6 py-4">{{ product.rating }}</td>
          <td class="px-6 py-4">{{ product.stock }}</td>
          <td class="px-6 py-4">
            <span
              v-for="tag in product.tags"
              class="inline-block bg-gray-200 rounded-full px-3 py-1 text-sm font-semibold text-gray-700 mr-2"
            >
              {{ tag }}
            </span>
          </td>
          <td>
            <span
              class="inline-block bg-yellow-200 rounded-full px-3 py-1 text-sm font-semibold text-gray-700 mr-2"
              ><RouterLink :to="`/edit/${product.id}`">Edit</RouterLink></span
            >
            <span
              class="inline-block bg-red-200 rounded-full px-3 py-1 text-sm font-semibold text-gray-700 mr-2"
              ><RouterLink :to="`/delete/${product.id}`">Delete</RouterLink></span
            >
          </td>
        </tr>
      </tbody>
    </table>
  </div>
</template>

DEMO