Full-Stack React Projects - Second Edition

Deleting credentials

When a user successfully signs out from the application, we want to clear the stored JWT credentials from sessionStorage. This can be accomplished by calling the clearJWT method, which is defined in the following code.

mern-skeleton/client/auth/auth-helper.js:

clearJWT(cb) {      if(typeof window !== "undefined")        sessionStorage.removeItem('jwt')      cb()      signout().then((data) => {          document.cookie = "t=; expires=Thu, 01 Jan 1970 00:00:00           UTC; path=/;"      })}

This clearJWT method takes a callback function as an argument, and it removes the JWT credential from sessionStorage. The passed in cb() function allows the component initiating the signout functionality to dictate what should happen after a successful sign-out.

The clearJWT ...