Axios setup and configuration in Vue - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is Axios used for in Vue applications?

Axios is a library used to make HTTP requests from Vue applications to servers. It helps fetch or send data easily.

beginner

How do you create a basic Axios instance with a base URL?

You use axios.create({ baseURL: 'https://api.example.com' }) to make a reusable Axios instance with a default URL for all requests.

intermediate

What is the purpose of Axios interceptors?

Interceptors let you run code before a request is sent or after a response is received. This helps add headers, handle errors, or log data.

intermediate

How do you set a default header for all Axios requests?

You can set default headers like this: axios.defaults.headers.common['Authorization'] = 'Bearer token'. This adds the header to every request.

beginner

Why is it helpful to create a separate Axios configuration file in Vue projects?

A separate config file keeps your HTTP setup organized and reusable. It makes it easy to update URLs, headers, or interceptors in one place.

What does axios.create() do?

A Creates a new Axios instance with custom settings

B Sends a GET request immediately

C Deletes all Axios defaults

D Imports Axios into the project

axios.create() makes a new Axios instance where you can set base URLs and headers separately from the global Axios.

Where do you add a header to every Axios request?

A In the CSS file

B Inside the Vue component data

C In the HTML meta tags

D In <code>axios.defaults.headers.common</code>

Headers for all requests go in axios.defaults.headers.common so every request includes them automatically.

What is an Axios interceptor used for?

A To handle CSS animations

B To style the Vue app

C To modify requests or responses globally

D To create Vue components

Interceptors let you run code before requests or after responses, useful for adding tokens or error handling.

How do you import Axios in a Vue 3 project?

A import axios from 'axios'

B require('axios')

C <script src='axios.js'></script>

D import { axios } from 'vue'

Use ES module syntax: import axios from 'axios' to use Axios in Vue 3.

Why create a separate Axios config file?

A To store Vue components

B To keep HTTP setup organized and reusable

C To write CSS styles

D To manage database schemas

A config file centralizes Axios settings, making maintenance easier and code cleaner.

Explain how to set up Axios in a Vue 3 project including creating an instance and adding a default header.

Think about making a reusable Axios setup for all your HTTP calls.

Describe what Axios interceptors are and give an example of how they can be used in Vue.

Imagine you want to add a token to every request automatically.