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dart / sdk / 71cffed55cfb088e202da1927bb50ec769d8d1eb
commit71cffed55cfb088e202da1927bb50ec769d8d1eb[log] [tgz]
authorJoshua Litt <joshualitt@google.com>Fri Feb 17 18:20:59 2023 +0000
committerCommit Queue <dart-scoped@luci-project-accounts.iam.gserviceaccount.com>Fri Feb 17 18:20:59 2023 +0000
tree4df66740c66a78e6d07d6e3b74d9ee5b63bc9f6d
parent1bf4dd4595ab960b1ad4aebad986fa20cb261889 [diff]
[js_types] Add Helpers to work with `JSUndefined` and `JSNull`.

Before we can reify `JSUndefined` and `JSNull` we need to give users a way to detect these values. Once existing users have migrated to these new helpers, then we can start boxing `JSUndefined` and `JSNull` on Dart2Wasm.

There are a few steps here:
1) Land these helpers, but for now they will just preserve the existing semantics.
2) Deploy JS types to Flutter and `package:test`, i.e. everywhere Dart2Wasm's JS interop is currently being used, and use these helpers instead of `null` checks.
3) Switch the semantics of the helpers to stop conflating on all Web backends, while simultaneously boxing `JSNull` and `JSUndefined` on Dart2Wasm.

CoreLibraryReviewExempt: Refactoring web only libraries + some changes to Wasm's internal libraries.
Change-Id: Idb50b28b3087438751557ffd28505c7b536bf78b
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/282481
Reviewed-by: Srujan Gaddam <srujzs@google.com>
Commit-Queue: Joshua Litt <joshualitt@google.com>
8 files changed
tree: 4df66740c66a78e6d07d6e3b74d9ee5b63bc9f6d
  1. .dart_tool/
  2. .github/
  3. benchmarks/
  4. build/
  5. docs/
  6. pkg/
  7. runtime/
  8. samples/
  9. sdk/
  10. tests/
  11. third_party/
  12. tools/
  13. utils/
  14. .clang-format
  15. .gitattributes
  16. .gitconfig
  17. .gitignore
  18. .gn
  19. .mailmap
  20. .style.yapf
  21. .vpython
  22. AUTHORS
  23. BUILD.gn
  24. CHANGELOG.md
  25. codereview.settings
  26. CONTRIBUTING.md
  27. DEPS
  28. LICENSE
  29. OWNERS
  30. PATENT_GRANT
  31. PRESUBMIT.py
  32. README.dart-sdk
  33. README.md
  34. sdk_args.gni
  35. SECURITY.md
  36. WATCHLISTS
README.md

Dart

A client-optimized language for fast apps on any platform

Dart is:

  • Optimized for UI: Develop with a programming language specialized around the needs of user interface creation.

  • Productive: Make changes iteratively: use hot reload to see the result instantly in your running app.

  • Fast on all platforms: Compile to ARM & x64 machine code for mobile, desktop, and backend. Or compile to JavaScript for the web.

Dart's flexible compiler technology lets you run Dart code in different ways, depending on your target platform and goals:

  • Dart Native: For programs targeting devices (mobile, desktop, server, and more), Dart Native includes both a Dart VM with JIT (just-in-time) compilation and an AOT (ahead-of-time) compiler for producing machine code.

  • Dart Web: For programs targeting the web, Dart Web includes both a development time compiler (dartdevc) and a production time compiler (dart2js).

Dart platforms illustration

License & patents

Dart is free and open source.

See LICENSE and PATENT_GRANT.

Using Dart

Visit dart.dev to learn more about the language, tools, and to find codelabs.

Browse pub.dev for more packages and libraries contributed by the community and the Dart team.

Our API reference documentation is published at api.dart.dev, based on the stable release. (We also publish docs from our beta and dev channels, as well as from the primary development branch).

Building Dart

If you want to build Dart yourself, here is a guide to getting the source, preparing your machine to build the SDK, and building.

There are more documents on our wiki.

Contributing to Dart

The easiest way to contribute to Dart is to file issues.

You can also contribute patches, as described in Contributing.