Google+ Sign-In with JavaScript callback issue

Question

I am working on a function which allows users to sign in on my website with their Google account.

My code is based on the Google documentation (others signIn() options a

Answer 1

I am facing the same issue: signin callback called twice in case of user that already granted permission; the local variable approach (initializedGoogleCallback) isn't working for me because it call the callback one time only when the user already granted access, but didn't call it if the user is the new one. After a bit of research (i especially dig in site using the g+ auth) i noticed that all of them use the 'approvalprompt': 'force' and they have the already granted user to reapprove a "Offline Access" policy everytime. Even the google example i followed to setup my app (https://developers.google.com/+/web/signin/javascript-flow) even if it did not mention it, it uses the "force" parameter. For the moment it seems the only solution if you want to use the javascript flow (that mean if you need a personal style signin button)