i18n_extension_core 5.0.2

Dart-only package for Translation and Internationalization (i18n), with Dart extensions. Easy to use for both large and small projects.

i18n_extension_core

This is the core Dart-only package for the i18n_extension package.

In your Flutter app:

• Do NOT include this core package directly.

  Instead, go to the i18n_extension package which already exports this core code, plus provides Flutter related code like the I18n widget that you must use to wrap your widget tree.

In your Dart server or Dart-only code:

• If you are working on a Dart server-side application (backend) using frameworks such as Serverpod, Dart Frog, or Shelf, or developing a Dart-only package that does not rely on Flutter, you can use this package directly.:

  import 'package:i18n_extension_core/i18n_extension_core.dart';
    
  extension Localization on String {
    static var t = Translations.byText("en_us") + {"en_us":"Hello", "pt_br":"Hola"};
    String get i18n => localize(this, t);
  }
    
  DefaultLocale.set("es_ES");
  expect("Hello".i18n, "Hola");
  

  Note: One key use case is translating exception messages from the backend to the frontend. For example, if the backend throws an exception like: MyException('The password you typed is invalid'.i18n) it will automatically appear on the frontend as: MyException('La contraseña que ingresaste no es válida') if the user's device language is set to Spanish.

Documentation

Go to i18n_extension to read the docs.

There are only 2 differences when using this package directly:

• Here you don't have access to the I18n widget, which is a Flutter widget.

• The way to set the default locale is different. Instead of using the I18n widget, you must use the DefaultLocale.set() static method, like in the example above.

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By Marcelo Glasberg

glasberg.dev
github.com/marcglasberg
linkedin.com/in/marcglasberg/
twitter.com/glasbergmarcelo
stackoverflow.com/users/3411681/marcg
medium.com/@marcglasberg

My article in the official Flutter documentation:

• Understanding constraints

The Flutter packages I've authored:

• async_redux
• provider_for_redux
• i18n_extension
• align_positioned
• network_to_file_image
• image_pixels
• matrix4_transform
• back_button_interceptor
• indexed_list_view
• animated_size_and_fade
• assorted_layout_widgets
• weak_map
• themed
• bdd_framework
• tiktoken_tokenizer_gpt4o_o1

My Medium Articles:

• Async Redux: Flutter’s non-boilerplate version of Redux (versions: Português)
• i18n_extension (versions: Português)
• Flutter: The Advanced Layout Rule Even Beginners Must Know (versions: русский)
• The New Way to create Themes in your Flutter App