Full-Stack React Projects

Managing auth state

In client/auth/auth-helper.js, we will define the following helper methods to store and retrieve JWT credentials from client-side sessionStorage, and also clear out the sessionStorage on user sign-out:

• authenticate(jwt, cb): Save credentials on successful sign-in:

authenticate(jwt, cb) {    if(typeof window !== "undefined")        sessionStorage.setItem('jwt', JSON.stringify(jwt))    cb()}

• isAuthenticated(): Retrieve credentials if signed-in:

isAuthenticated() {    if (typeof window == "undefined")      return false    if (sessionStorage.getItem('jwt'))      return JSON.parse(sessionStorage.getItem('jwt'))    else      return false}

• signout(cb): Delete credentials and sign out:

signout(cb) {      if(typeof window !== "undefined") sessionStorage.removeItem('jwt') ...