docs(OrganizationNumber): adds docs about validation (#4078)

packages/dnb-design-system-portal/src/docs/uilib/extensions/forms/feature-fields/OrganizationNumber/info.mdx

@@ -8,6 +8,7 @@ showTabs: true
 
 This input expects a 9-digit number as its value. This is because Norwegian organization numbers are 9-digits long, based on info from [Brønnøysundregisteret](https://www.brreg.no/en/about-us-2/our-registers/about-the-central-coordinating-register-for-legal-entities-ccr/about-the-organisation-number/?nocache=1701776533136)
 It validates input for Norwegian organization numbers, as described by [Brønnøysundregistrene](https://www.brreg.no/om-oss/registrene-vare/om-enhetsregisteret/organisasjonsnummeret/).
+The validation happens on blur, internally using the `onBlurValidator` [property](/uilib/extensions/forms/feature-fields/OrganizationNumber/properties/#field-specific-properties).
 
 ```jsx
 import { Field } from '@dnb/eufemia/extensions/forms'

packages/dnb-design-system-portal/src/docs/uilib/extensions/forms/feature-fields/OrganizationNumber/properties.mdx

@@ -5,19 +5,17 @@ showTabs: true
 import TranslationsTable from 'dnb-design-system-portal/src/shared/parts/TranslationsTable'
 import PropertiesTable from 'dnb-design-system-portal/src/shared/parts/PropertiesTable'
 import { fieldProperties } from '@dnb/eufemia/src/extensions/forms/Field/FieldDocs'
+import { OrganizationNumberProperties } from '@dnb/eufemia/src/extensions/forms/Field/OrganizationNumber/OrganizationNumberDocs'
 
 ## Properties
 
 ### Field-specific properties
 
-| Property   | Type      | Description                                                                     |
-| ---------- | --------- | ------------------------------------------------------------------------------- |
-| `validate` | `boolean` | _(optional)_ Using this property you can disable the default validation.        |
-| `help`     | `object`  | _(optional)_ Provide a help button. Object consisting of `title` and `content`. |
+<PropertiesTable props={OrganizationNumberProperties} />
 
 ### General properties
 
-<PropertiesTable props={fieldProperties} />
+<PropertiesTable props={fieldProperties} omit={['onBlurValidator']} />
 
 ## Translations
 

packages/dnb-eufemia/src/extensions/forms/Field/OrganizationNumber/OrganizationNumberDocs.tsx

@@ -0,0 +1,19 @@
+import { PropertiesTableProps } from '../../../../shared/types'
+
+export const OrganizationNumberProperties: PropertiesTableProps = {
+  validate: {
+    doc: 'Using this prop you can disable the default validation.',
+    type: 'boolean',
+    status: 'optional',
+  },
+  help: {
+    doc: 'Provide a help button. Object consisting of `title` and `content`.',
+    type: 'object',
+    status: 'optional',
+  },
+  onBlurValidator: {
+    doc: 'Custom validator function that is triggered when the user leaves a field (e.g., blurring a text input or closing a dropdown). The function can be either asynchronous or synchronous. The first parameter is the value, and the second parameter returns an object containing { errorMessages, connectWithPath, validators }. Defaults to organization number validation.',
+    type: 'function',
+    status: 'optional',
+  },
+}