axios vs isomorphic-fetch: What are the differences?

Introduction

In this article, we will discuss the key differences between axios and isomorphic-fetch. Both libraries are popular choices for making HTTP requests in JavaScript applications. Understanding these differences can help developers choose the most suitable library for their specific needs.

1. Promises vs. async/await: One major difference between axios and isomorphic-fetch is the way they handle asynchronous code. Axios uses a Promise-based approach, allowing developers to use then() and catch() methods to handle asynchronous operations. On the other hand, isomorphic-fetch supports the use of async/await syntax, which provides a more concise and readable way to handle asynchronous operations.

2. Browser and Node.js support: Axios is designed to work both in the browser and in Node.js environments, making it a versatile choice for developers who need to make HTTP requests in different contexts. Isomorphic-fetch, as the name suggests, is designed to be isomorphic or universal, meaning it can run in both the browser and Node.js environments without any additional configurations.

3. Request cancellation: Axios provides built-in support for request cancellation by using a cancel token. Developers can create a cancel token and pass it to the axios request, allowing them to cancel the request at any point before it completes. Isomorphic-fetch does not have built-in support for request cancellation, which can be a limitation for certain use cases.

4. Request interception and transformation: Axios allows developers to intercept and transform HTTP requests and responses using interceptors. Interceptors can be used to modify request headers, transform request and response data, handle errors, and perform other tasks. Isomorphic-fetch does not have built-in support for request interception and transformation, which can be a limitation for developers who need more fine-grained control over HTTP requests.

5. Default request headers: Axios allows developers to set default headers for all requests, which can be useful for including common headers such as authorization tokens. Isomorphic-fetch does not have built-in support for default headers, requiring developers to manually include headers in each request.

6. File upload and download: Axios provides built-in support for handling file upload and download operations. It allows developers to send files and track their progress, as well as download files by following redirects. Isomorphic-fetch does not have built-in support for file upload and download, making it less suitable for applications that require these functionalities.

In summary, axios and isomorphic-fetch offer different approaches to handling HTTP requests in JavaScript applications. While axios provides comprehensive features such as request cancellation, interceptors, default headers, and file upload/download support, isomorphic-fetch excels in its promise and async/await syntax and its ability to run seamlessly in both browser and Node.js environments. Developers should consider their specific needs and requirements when choosing between these two libraries.