FontFeature.stylisticAlternates constructor Null safety

const FontFeature.stylisticAlternates()

Enable stylistic alternates. (salt)

Some fonts have alternative forms that are not tied to a particular purpose (such as being historical forms, or contextually relevant alternatives, or ligatures, etc). This font feature enables these purely stylistic alternatives.

This may override other features that substitute glyphs.

link
The Source Code Pro font supports the salt feature. It causes some glyphs to be rendered differently, for example the "a" and "g" glyphs change from their typographically common double-storey forms to simpler single-storey forms, the dollar sign's line changes from discontinuous to continuous (and is angled), and the "0" rendering changes from a center dot to a slash.

To create a local project with this code sample, run:
flutter create --sample=dart.dart_ui.FontFeature.stylisticAlternates.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 Source Code Pro font can be downloaded from Google Fonts (https://www.google.com/fonts).
    return const Text(
      r'Agile Game - $100 initial bet',
      style: TextStyle(
        fontFamily: 'Source Code Pro',
        fontFeatures: <FontFeature>[
          FontFeature.stylisticAlternates(),
        ],
      ),
    );
  }
}

See also:

Implementation

const FontFeature.stylisticAlternates() : feature = 'salt', value = 1;