What is the spinning icon I see on GoRails?
I see a spinning/loading icon on the right. In addition, I see the loading lightning-like animation right below the address bar, what gem is it? or what library are you using? Thanks.
That would be the Turbolinks progress bar. It gives you a sense of progress since the site is using Turbolinks and the browser doesn't actually show progress when pages are loading. You can find out some more about it here: https://github.com/rails/turbolinks#progress-bar