This package is a polyfill for the core library constant names that are changing from Dart 1 to Dart 2.
In Dart 1, all core library constants were in
SCREAMING_CAPS. In Dart 2,
they're being changed to
camelCase. This package makes it possible for
packages to support both Dart 1 and Dart 2 by providing
that work on all versions of Dart.
This package has a library for each library
dart: library that contained
constants in Dart 1. These libraries contain only constants, using the Dart 2
names. They should be imported using a prefix so as to avoid colliding with core
import 'package:dart2_constant/convert.dart' as convert; String decodeUtf8(List<int> bytes) => convert.utf8.decode(bytes);
Note that this even supports constants that haven't yet migrated in the core
libraries, such as those in
dart:html. These are provided for
compatibility with future SDK changes.
Each version of
dart2_constant has two releases, one tagged
only compatible SDKs that have old-style constants and one tagged
that's only compatible with SDKs that have new-style constants. As long as you
dart2_constant, pub's version solver will make sure your users get
a version of it that works for them.
Add this to your package's pubspec.yaml file:
dependencies: dart2_constant: ^1.0.2+dart2
You can install packages from the command line:
$ pub get
Alternatively, your editor might support
Check the docs for your editor to learn more.
Now in your Dart code, you can use:
import 'package:dart2_constant/async.dart'; import 'package:dart2_constant/convert.dart'; import 'package:dart2_constant/core.dart'; import 'package:dart2_constant/developer.dart'; import 'package:dart2_constant/html.dart'; import 'package:dart2_constant/io.dart'; import 'package:dart2_constant/isolate.dart'; import 'package:dart2_constant/math.dart'; import 'package:dart2_constant/svg.dart'; import 'package:dart2_constant/typed_data.dart'; import 'package:dart2_constant/web_gl.dart'; import 'package:dart2_constant/web_sql.dart';
|1.0.2+dart2||Aug 3, 2018|
|1.0.1+dart2||Apr 3, 2018|
|1.0.1+dart1||Apr 3, 2018|
|1.0.0+dart2||Apr 2, 2018|
|1.0.0+dart1||Apr 2, 2018|
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|Dart SDK||>=2.0.0-dev.34.0 <3.0.0|