Looking for logging into the Google Without Popup site and are not getting the correct working link for it? In such a case, you can use the links given here by searching your desired login page in the search box. If the page is present on our website then you will get all the links related to the Google Without Popup site. After that you can login as usual with your login credentials.
https://stackoverflow.com/questions/27905780/google-sign-in-using-javascript-api-without-triggering-popup
https://github.com/google/google-api-javascript-client/issues/288
https://github.com/google/google-api-javascript-client/issues/370
https://developers.google.com/identity/sign-in/web/server-side-flow
https://developers.google.com/identity/sign-in/web/reference
https://developers.google.com/identity/protocols/OAuth2UserAgent
https://firebase.google.com/docs/auth/web/google-signin
https://arveknudsen.com/?p=368
https://www.cloudsponge.com/news/2015/06/01/goodbye-oauth-popup-if-you-want/
http://www.gethugames.in/2012/04/authentication-and-authorization-for-google-apis-in-javascript-popup-window-tutorial.html
https://developers.facebook.com/docs/facebook-login/web/
https://support.justuno.com/hc/en-us/articles/115002814127-Google-Login-Plugin
http://usefulangle.com/post/55/google-login-javascript-api