FontFeature.proportionalFigures constructor Null safety

const FontFeature.proportionalFigures()

Use proportional (varying width) figures. (pnum)

For fonts that have both proportional and tabular (monospace) figures, this enables the proportional figures.

This is mutually exclusive with FontFeature.tabularFigures.

The default behavior varies from font to font.

link
The Kufam font supports the pnum feature. It causes the digits to become proportionally-sized, rather than all being the same width. In this font this is especially noticeable with the digit "1": normally, the 1 has very noticeable serifs in this sans-serif font, but with the proportionally figures enabled, the digit becomes much narrower.

To create a local project with this code sample, run:
flutter create --sample=dart.dart_ui.FontFeature.proportionalFigures.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),
    );
  }
}

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

  @override
  Widget build(BuildContext context) {
    // The Kufam font can be downloaded from Google Fonts (https://www.google.com/fonts).
    return const Text(
      'Call 311-555-2368 now!',
      style: TextStyle(
        fontFamily: 'Kufam',
        fontFeatures: <FontFeature>[
          FontFeature.proportionalFigures(),
        ],
      ),
    );
  }
}

See also:

Implementation

const FontFeature.proportionalFigures() : feature = 'pnum', value = 1;