# Using Axios in Vue.js: A Step-by-Step Guide

Mastering Axios in Vue.js: A Comprehensive Guide

Axios is a powerful, promise-based HTTP client library that allows you to make seamless requests in your Vue.js applications. In this article, we’ll explore two ways to use Axios in Vue.js, along with advanced configurations and interceptors.

Prerequisites

Before diving into the world of Axios, ensure you have the following:

• Node.js v18 or newer
• A JavaScript package manager (we’ll use npm)
• An IDE or text editor of your choice

Setting up a Vue.js Project

Create a new Vue.js project using the Vue CLI by running the following command:
bash
vue create my-project

Follow the prompts to set up your project, and choose the default settings or customize as desired.

Adding Axios to Your Vue.js App

Install Axios by running the following command:
bash
npm install axios

Now that Axios is installed, let’s explore two ways to use it in your Vue.js project.

Method 1: Importing Axios Directly

Import Axios directly into your component and use it to make requests.
“`javascript
import axios from ‘axios’;

export default {
methods: {
fetchData() {
axios.get(‘https://api.example.com/data’)
.then(response => {
console.log(response.data);
})
.catch(error => {
console.error(error);
});
},
},
};
“`
Method 2: Creating an Axios Plugin

Create an Axios plugin to inject a global Axios object into your Vue.js application.

Create a new file called axios.js in the src/plugins directory:
“`javascript
import axios from ‘axios’;

const instance = axios.create({
baseURL: ‘https://api.example.com’,
});

export default {
install(Vue) {
Vue.prototype.$axios = instance;
},
};

In your `main.js` file, import and register the plugin:
javascript
import Vue from ‘vue’;
import axiosPlugin from ‘./plugins/axios’;

Vue.use(axiosPlugin);

Now you can use the `$axios` object in your components:
javascript
export default {
methods: {
fetchData() {
this.$axios.get(‘/data’)
.then(response => {
console.log(response.data);
})
.catch(error => {
console.error(error);
});
},
},
};
“`
Advanced Axios Configurations and Interceptors

Explore advanced Axios configurations and interceptors to enhance your request workflow.

Interceptors

Use interceptors to perform actions before executing a request or returning a response:
“`javascript
import axios from ‘axios’;

axios.interceptors.push({
request: config => {
// Modify the request configuration
return config;
},
error: error => {
// Handle request errors
return Promise.reject(error);
},
});
“`
Error Handling

Handle errors using the catch block or by setting a custom error handler:
javascript
axios.get('/data')
.catch(error => {
console.error(error);
});

Cancelling Requests

Use the AbortController to cancel ongoing requests:
“`javascript
import axios from ‘axios’;
import { AbortController } from ‘abort-controller’;

const controller = new AbortController();

axios.get(‘/data’, {
signal: controller.signal,
})
.then(response => {
console.log(response.data);
})
.catch(error => {
if (axios.isCancel(error)) {
console.log(‘Request cancelled’);
} else {
console.error(error);
}
});

// Cancel the request
controller.abort();
“`
By mastering Axios in your Vue.js applications, you’ll be able to make seamless requests and handle errors with ease.