The biggest difference when switching to React Advanced Form validation is that it diverges from a conventional single validate function and uses a dedicated validation schema to determine the next validity state of the fields.

Validation types

Any field supports synchronous and asynchronous validation, and any combination of those.

Validation schema

The majority of validation rules reside in the dedicated validation schema. It is a good place to start declaring validation in your application.

Applying validation

There are multiple ways to apply validation to a field (listed by priority, from highest to lowest):

• ​Field-specific rules

• ​Form-specific rules

• ​Application-wide rules

Validation messages

Validation is a communication between your system and a user. Converse clearly with our versatile API and smart fallback system. Take advantage of the key features of a validation message:

• Completely decoupled from the validation schema

• Each message can be a function that accepts the field's value, fieldProps, fields and form, and returns the message string

• Allows to associate a message with a specific rule name

Backwards compatible

We are using a specific validation format—validation schema. It is, however, a plain Object that can be used even without React Advanced Form.