User Experience matters. A lot. Parsley is totally aware of that, and is designed to help your users and not bother or frustrate them.
Less than 800 lines. Less than 12k minified.
Works with jQuery and Zepto (with data and fx_methods added).
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Parsley is open source, MIT licensed, and developed to help everyone. It will stay that way.
Want to validate a form? Just write it in English with the awesome Parsley DOM-API using jQuery data API.
Form validation is important, #UX is critical. Parsley is shipped almost bug free to help you with that.
See Parsley Test Suite.