Using Axios Interceptors in Vue.js

Axios is a popular JavaScript library that is used to make HTTP requests from the browser. In Vue.js, Axios is commonly used to fetch data from APIs and perform CRUD operations. One powerful feature of Axios is its ability to use interceptors to globally handle request and response logic.

Interceptors are functions that Axios calls for every request and response before they are handled by the .then or .catch functions. This makes them a powerful tool for adding global logic to your Axios requests and responses, such as adding authentication headers, logging, error handling, and more.

Using Interceptors in Vue.js

To use interceptors in a Vue.js application, you can create a plugin that sets up the interceptors and then use the plugin in your main Vue instance. Here’s an example of how you might set up a basic interceptor to log all requests and responses:

“`javascript
// axios-interceptors.js

import axios from ‘axios’;

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

http.interceptors.request.use(request => {
console.log(‘Starting Request’, request)
return request
})

http.interceptors.response.use(response => {
console.log(‘Response:’, response)
return response
})
“`

Once you have created your interceptor plugin, you can use it in your main Vue instance like this:

“`javascript
// main.js

import Vue from ‘vue’
import App from ‘./App.vue’
import ‘./axios-interceptors’

Vue.config.productionTip = false

new Vue({
render: h => h(App),
}).$mount(‘#app’)
“`

Now, all of your Axios requests will go through the interceptors, allowing you to easily add global logic that applies to all HTTP requests and responses in your Vue.js application.

Conclusion

Using Axios interceptors in Vue.js is a powerful way to add global logic to your HTTP requests and responses. Whether you need to add authentication headers, log requests and responses, or handle errors consistently across your application, interceptors provide a clean and reusable way to apply this logic to all of your Axios requests. By creating a plugin to set up your interceptors and using it in your main Vue instance, you can easily take advantage of this powerful feature in your Vue.js applications.