I have built an app that validates forms client side with html5. I’m looking for the javascript-implementation that best emulates this behavior in older browsers.
Important qualities are:
- As similar behavior as possible.
- As little modification of css/html as possible
- As little functionality besides field-validation built in as possible
CSS tricks has a nice article on the fallback process here:
http://css-tricks.com/progressively-enhancing-html5-forms/
They also suggest a project such as this
http://code.google.com/p/webforms2/
Which includes some of the HTML5 form validation goodness
Just remember to always check server side too when it comes to validation 🙂