Add JS for admin
Use setTimeout()
Add CSS
Prevent Double Click
Add loading Image
Adjust Image Size
Change Loading Icon Place
Update Animation
Remove Some Scripts
Update Library
Display register data
Use wp_localize_script() for JS data
U2F API Demo
Decode String->JSON
Consider Subdomain Install
Register with Ajax
Add server-side register action
Set User ID
Use real Data for list
Enable remove action