Forms: validation

The best practice is to validate a form on submission. It is recommended to avoid default HTML5 form validation. To turn this off, add the novalidate attribute to the <form> element.

Visit the GOV.UK Design system for more advice about form validation.

¶Client side validation

If client side validation is required, here are some suggested JavaScript libraries:

• Parsley
• PristineJS

Alternatively, you could roll your own thanks to Chris Ferdinandi's series on form validation.