Given html5 form markup, and a form-encoded post body, is there a simple way to validate the form? I think it would be cool to reuse html5 form markup itself as the authoritative source of validation rules.
So basically, on the client-side, the browser would validate against the form, and then on the server-side, the server would load the same form, and validate the post body against it again.
I'm most interested in node.js, but any server-side language/framework that makes this easy would be of interest. I thought of using zombie.js, but it does not currently support html5 form constraint validation.