React Validator - RequiredRule

A validation rule that demands that a validated field has a value.

Type:

Object

Use this rule type to ensure the target editor value is specified. The rule will be broken in the following cases.

  • If the validated value is null.
  • If the specified value has a type that is not expected for the target field (e.g., a string for the DateBox widget).

View Demo

See Also

message

Specifies the message that is shown for end-users if the current rule is broken.

Type:

String

Default Value: 'Required'

You do not have to specify this field. If you chose not to specify it, a default message will be shown. To include the name of the validated editor into the default validation message as a subject, set the name field of the dxValidator object.

If you assign an empty string to the message field, the message will not be shown.

trim

Indicates whether to remove the Space characters from the validated value.

Type:

Boolean

Default Value: true

To keep the Space characters within the validated value, set this field to false.

type

Specifies the type of the current rule.

Type:

String

Accepted Values: 'required' | 'numeric' | 'range' | 'stringLength' | 'custom' | 'compare' | 'pattern' | 'email'

Set this field to 'required' to define a rule that will be broken if the validated value is not specified.