问题 I'm putting together a webapp that uses google plus signin using this guide. I am running the webapp on localhost:8888 . Using javascript like this, things work fine: gapi.signin.render(thisHandle.details.buttonId, { 'callback': mySignIn, 'clientid': myClientId, 'requestvisibleactions': 'http://schemas.google.com/AddActivity', 'scope': 'https://www.googleapis.com/auth/plus.login', 'theme': 'light', 'cookiepolicy': 'single_host_origin', 'accesstype': 'offline' }); If I change my cookiepolicy