Angular2 - How to best handle expired authentication token?

Question

I am using Angular 2.1.2.

I have an authentication token (using angular2-jwt) and if it expires my webApi call fails with a 401 error. I am looking for a solution where

Answer 1

Use a browser session:

https://developer.mozilla.org/de/docs/Web/API/Window/sessionStorage

Store the data as json string and then recreate form data if request fails.