No-Library (pure JS), HTML, CSS, JavaScript
jQuery 2.1.3, HTML, CSS, JavaScript
jQuery 1.8.3, HTML, CSS, JavaScript
https://stackoverflow.com/questions/47194547/bootstrap-login-with-javascript
https://stackoverflow.com/questions/46886417/bootstrap-popovers-not-aligning-with-arrow?noredirect=1#comment80726138_46886417