Comments:"Parsley.js"
Super #UX focused
User Experience matters. A lot. Parsley is totally aware of that, and is designed to help your users and not bother or frustrate them.
See demonstration.
Super light
Less than 800 lines. Less than 12k minified.
Works with jQuery and Zepto.
Get Latest version.
Super free
Parsley is open source, MIT licenced, and developped to help everyone. It will stay that way.
See Licence.
Super configurable
Like no other javascript library, Parsley has a full room for #UX concerns and details options. Override almost every Parsley default behaviors to fit your exact needs.
See documentation.
Super simple
Want to validate a form? Just write it in English with awesome Parsley DOM-API using jQuery data API.
See documentation.
Super reliable
Form validation is important, #UX is critical. Parsley is shipped almost bugs free to help you on that.
See Parsley Test Suite.