FontFeature.numerators constructor Null safety

const FontFeature.numerators()

Display digits as numerators. (numr)

This is typically used automatically by the font rendering system as part of the implementation of frac for the numerator part of fractions (see FontFeature.fractions).

link
The Piazzolla font supports the numr feature. It causes the digits to be rendered smaller and near the top of the EM box.

To create a local project with this code sample, run:
flutter create --sample=dart.dart_ui.FontFeature.numerators.1 mysample 
import 'dart:ui';

import 'package:flutter/widgets.dart';

void main() => runApp(const ExampleApp());

class ExampleApp extends StatelessWidget {
  const ExampleApp({super.key});

  @override
  Widget build(BuildContext context) {
    return WidgetsApp(
      builder: (BuildContext context, Widget? navigator) =>
          const ExampleWidget(),
      color: const Color(0xffffffff),
    );
  }
}

/// This is the stateless widget that the main application instantiates.
class ExampleWidget extends StatelessWidget {
  const ExampleWidget({super.key});

  @override
  Widget build(BuildContext context) {
    // The Piazzolla font can be downloaded from Google Fonts (https://www.google.com/fonts).
    return const Text(
      'Fractions: 1/2 2/3 3/4 4/5',
      style: TextStyle(
        fontFamily: 'Piazzolla',
        fontFeatures: <FontFeature>[
          FontFeature.numerators(),
        ],
      ),
    );
  }
}

See also:

Implementation

const FontFeature.numerators() : feature = 'numr', value = 1;