Flutter

dependencies:
  nipost_postcode_widget: ^0.1.0

import 'package:nipost_postcode_widget/nipost_postcode_widget.dart';

final selection = await PostcodeWidget.show(
  context,
  PostcodeWidgetConfig(
    publishableKey: 'nipost_pk_live_…',
    identifierType: IdentifierType.email,
    prefilledIdentifier: 'ada@example.com',
  ),
);

if (selection != null) {
  debugPrint('picked ${selection.formatted}');
}