When working with fetch and making AJAX calls, you will often need to authenticate your requests. Token authentication, and in particular, JWT token authentication is a common way of handling this. This tutorial covers the basics of JWT tokens in the browser and how you can include the Authentication header in making your bearer token requests. Code GIST: https://gist.github.com/prof3ssorSt3v3/17ce73282dc7b08bcdd8c3f40826cb17 JWT website : https://jwt.io/ JSONPlaceHolder site: http://jsonplaceholder.typi