Introduction to Axios Interceptors

In Vue.js, Axios is a popular library for making HTTP requests. Axios interceptors allow you to globally handle requests and responses, making it a powerful tool for tasks like adding authentication tokens, handling errors, or modifying requests before they are sent. In this guide, we'll explore how to use Axios interceptors in Vue.js for global request handling.

Installing Axios

To use Axios in your Vue.js project, you need to install it. You can do this using npm or yarn. Here's an example of installing Axios with npm:

# Install Axios
npm install axios
        

After installing Axios, you can import it in your Vue component.

Creating Axios Interceptors

Axios interceptors are functions that can be executed before a request is sent or after a response is received. You can set up global interceptors like this:

// Import Axios
import axios from 'axios';
// Request interceptor
axios.interceptors.request.use(
    (config) => {
        // Modify the request or add headers
        return config;
    },
    (error) => {
        return Promise.reject(error);
    }
);
// Response interceptor
axios.interceptors.response.use(
    (response) => {
        // Handle the response
        return response;
    },
    (error) => {
        // Handle errors globally
        return Promise.reject(error);
    }
);
        

In this example, we set up request and response interceptors to globally handle requests and responses. You can modify requests, add headers, or handle errors within these interceptors.

Using Axios Interceptors

Once you've created interceptors, Axios will automatically use them for all requests and responses. Here's an example of making a request with Axios and using interceptors:

// Make a request using Axios
axios.get('https://api.example.com/data')
    .then((response) => {
        // Handle the response
    })
    .catch((error) => {
        // Handle errors
    });
        

Axios will apply the configured interceptors to this request and its response.

Conclusion

Vue.js Axios interceptors provide a powerful way to globally handle HTTP requests and responses. By setting up interceptors, you can efficiently manage tasks like adding authentication tokens, handling errors, or modifying requests in your Vue.js applications.