FontFeature.historicalForms constructor Null safety

const FontFeature.historicalForms()

Use historical forms. (hist)

Some fonts have alternatives for letters whose forms have changed through the ages. In the Latin alphabet, this is common for example with the long-form "s" or the Fraktur "k". This feature enables those alternative glyphs.

This does not enable legacy ligatures, only single-character alternatives. To enable historical ligatures, use FontFeature.historicalLigatures.

This feature may override other glyph-substitution features.

link
The Cardo font supports the hist feature specifically for the letter "s": it changes occurrences of that letter for the glyph used by U+017F LATIN SMALL LETTER LONG S.

To create a local project with this code sample, run:
flutter create --sample=dart.dart_ui.FontFeature.historicalForms.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 Cardo font can be downloaded from Google Fonts (https://www.google.com/fonts).
    return const Text(
      'VIBRANT fish assisted his business.',
      style: TextStyle(
        fontFamily: 'Sorts Mill Goudy',
        fontFeatures: <FontFeature>[
          FontFeature.historicalForms(), // Enables "hist".
          // Use FontFeature.historicalLigatures() to enable "hlig" as well.
        ],
      ),
    );
  }
}

See also:

Implementation

const FontFeature.historicalForms() : feature = 'hist', value = 1;