HTML5 form validation

[Paul_Wilkins]

@codeispoetry

I believe HTML5 validation will be customizable also may be if wewant to use an image/Emoji→

HTML5 form validation supports CSS for styling and presentation.

CSS Pseudo-classes: Styling Form Fields Based on Their Input — SitePoint

Needless though it is to say, our CSS forum has skilled people that know how to make the most from that.