Check if user is authenticated or not -> auth-js sdk

guidobessone · February 25, 2020, 4:44pm

Hi! i implementing the auth.js sdk and i not find a method to hide a login button or show a logout button when the user is authenticated. The auth-spa-sdk have isAuthenticated() for example. How is the approach in this case ?

dan.woda · February 27, 2020, 9:45pm

Hi @guidobessone,

I would guide you towards the old vanilla js quickstart that used auth0js:

github.com

auth0-samples/auth0-javascript-samples/blob/99ad5f458a81d7fedeef2e286f32993bd6541d72/01-Login/app.js#L56


      
          }
          
          
function logout() {
            // Remove tokens and expiry time from localStorage
            localStorage.removeItem('access_token');
            localStorage.removeItem('id_token');
            localStorage.removeItem('expires_at');
            displayButtons();
          }
          
          
function isAuthenticated() {
            // Check whether the current time is past the
            // access token's expiry time
            var expiresAt = JSON.parse(localStorage.getItem('expires_at'));
            return new Date().getTime() < expiresAt;
          }
          
          
function handleAuthentication() {
            webAuth.parseHash(function(err, authResult) {
              if (authResult && authResult.accessToken && authResult.idToken) {
                window.location.hash = '';

You will notice that the quickstart defines a method for isAuthenticated, and handles the check by looking for an exp time in localstorage. This is similar to how it is handled in auth0-spa0-js, but you have to build it out yourself or use the quickstart.

I would recommend auth0-spa-js if you do not have a specific reason to use auth0js instead.

dan.woda · March 13, 2020, 1:46am

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