My Developing Blog

My Developing Blog

GraphQL in Vue3 using Apollo

Today I am going to show you how to use GraphQL in a Vue3 web application.

To keep this blog post simple and focused on the topic only, I will assume that you know how to create a Vue 3 app using the composition API and what GraphQL is.

First of all we need to install the following packages:

npm install --save @apollo/client @vue/apollo-composable @vue/composition-api graphql graphql-tag react vue@3.0.11 --legacy-peer-deps

As you might have noticed, we need to install react as it's a dependency of the Apollo client. The --legacy-peer-deps will allow us to install @vue/composition-api as it's a dependency of @vue/apollo-composable. And at the time of writing, vue@3.1.2 is not working properly with Apollo so we need to install vue@3.0.11.

At this point we are half way through the finish.

We now need to initialize the Apollo plugin and I like it to organize it this way:

Create a new folder called Plugins and inside create this file useApolloPlugin.js:

import { ApolloClient, InMemoryCache } from '@apollo/client'

const apolloClient = new ApolloClient( {
    uri: '',
    cache: new InMemoryCache(),
    headers: {
        "Authorization": "Bearer TO_ADD_FOR_TESTING_PURPOSES"
} )

export default apolloClient

In your app.js file write the following:

import { createApp, h } from 'vue'
import { provideApolloClient } from '@vue/apollo-composable'
import apolloClient from '@/Plugins/useApolloPlugin'

const app = createApp( {
    setup () {
        provideApolloClient( apolloClient )
} )

To simplify the GraphQL fetch handling process, I create a file in GraphQL/index.js with the following content:

import { useQuery, useResult } from '@vue/apollo-composable'
import { watch } from 'vue';

export default {
    runQuery ( query, model ) {
        const { result } = useQuery( query )

        watch(useResult( result, []), data => {
            model.value = data

The above file will send the query and once we have a result, will set the value on the given reactive variable model.

We can now start using Apollo to fetch queries, and this is how I like to do it:

        <button @click="fetchItems">Fetch items</button>
        <div v-for="item in items" :key="">
            {{ item }}

import { ref } from 'vue'
import { gql } from 'graphql-tag'
import GraphQL from '@/GraphQL'

export default {
    setup () {
        let items = ref( [] )

        const fetchItemsQuery = gql`
            query ItemsList {
                items  {

        const fetchItems = () => GraphQL.runQuery( fetchItemsQuery, items )

        return {
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