How Can I Automatically Send Cookies with Axios Requests?

Axios Cookie Handling: Sending Cookies Automatically in Requests

When using Axios to send requests from the client to an Express.js server, it may be necessary to automatically send cookies in those requests. This article explores how to achieve this functionality.

Problem Description

You're using Axios for client-server communication. You've set a cookie on the client, but when accessing headers or cookies in the Express.js server, you find that they're not present in your request.

Solution: Using the withCredentials Property

The withCredentials property of an Axios request object enables it to send cookies automatically. This property allows XMLHttpRequest requests from a different domain to set cookie values for their own domain.

Implementation Options

There are three ways to use the withCredentials property:

1. Specify it for individual requests:

axios.get('BASE_URL + "/todos"', { withCredentials: true });

2. Set it as a default for all Axios requests:

axios.defaults.withCredentials = true;

3. Use an axios instance with credentials:

const instance = axios.create({
  withCredentials: true,
  baseURL: BASE_URL,
});
instance.get('/todos');

Conclusion

Using the withCredentials property with Axios ensures that cookies set on the client are automatically included in all subsequent requests. This enables seamless communication between the client and the server, allowing for the use of cookies for authentication, session tracking, and other purposes.

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