Axios Tutorial

CS373: Chris Amini

Axios is a promise-based HTTP client that works both in the browser and in a Node.js environment. It provides a single API for dealing with XMLHttpRequests and node’s http interface. Besides that, it wraps the requests using a polyfill for ES6 new’s promise syntax. Almost any dynamic project you make needs to interface with a RESTFUL API at some point and using Axios is a simple way to do so. On my group’s project, the frontend used Axios to make calls to our backend. We made calls that would gather specific data regarding the three models of our website: cities, counties, and charities.

Installing Axios is easy and only requires two steps:

1. Install Axios

To install with yarn:

To install with npm:

Using CDN:

2. After downloading, on top of the JS file that you plan to use Axios on, add the line:

Using the example above, you can also give the query string as a parameter like so:

Using async/await:

Performing multiple concurrent requests

If you’re building an application where you need to consume data from an API, Axios is an easy way to do so. You can also use Axios for POST requests if you would like your application to store user input/data in your own server. In other words, almost any dynamic website that displays data from different sources needs some way to make HTTP requests, and Axios is one of the most popular ways to do so.

Some other alternatives to Axios include the fetch() method in Javascript or jQuery AJAX.With fetch there’s two steps to get JSON data, the first is to make the call, and the second is to call the .json() method on that response. For example, one query method that used Axios that my group used is shown below

If we had used fetch(), the method would’ve looked like this:

As you can see, with Axios, you don’t need to pass the results of the http request to the .json() method; it just gives you the data you’re looking for after get(). Axios is a lot easier to follow and read than the fetch() method or a request with jQuery. One of the backend members of my group had prior experience using Axios in one of his internships and recommended it so we ended up using it instead of the alternatives.

Some other benefits of Axios include:

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