https://wordpress.org/support/plugin/ajax-login-and-registration-modal-popup/reviews/?filter=2
[AJAX Login and Registration modal popup + inline form] Reviews | WordPress.org
login and registrationmodal popupinline formajax
https://wordpress.org/support/plugin/ajax-login-and-registration-modal-popup/reviews/?filter=4
[AJAX Login and Registration modal popup + inline form] Reviews | WordPress.org
login and registrationmodal popupinline formajax
https://www.creative-tim.com/twcomponents/component/inline-form-with-validation
Inline Form with Validation | Inputs
'Since sample for inline with validation is very limited'
inline formvalidationinputs