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Dart Announcements

1–30 of 381

Official announcements for the Dart project, including breaking changes, new releases, and other messages for the entire community.

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12/20/24

Breaking change [#59776]: `IntX implements Comparable<IntX>`

This message announces the intention to change the class `IntX` such that it implements `Comparable

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Breaking change [#59776]: `IntX implements Comparable<IntX>`

This message announces the intention to change the class `IntX` such that it implements `Comparable

12/20/24

12/13/24

Upcoming deprecation of legacy HTML and JavaScript libraries

Earlier this year, we launched a new set of Dart libraries for JavaScript interop and package:web to

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Upcoming deprecation of legacy HTML and JavaScript libraries

Earlier this year, we launched a new set of Dart libraries for JavaScript interop and package:web to

12/13/24

Michael Thomsen

12/13/24

Breaking change 59698: Remove support for ia32 from the Dart SDK

https://github.com/dart-lang/sdk/issues/59698 Support for ia32 has been deprecated for several

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Breaking change 59698: Remove support for ia32 from the Dart SDK

https://github.com/dart-lang/sdk/issues/59698 Support for ia32 has been deprecated for several

12/13/24

10/23/24

Breaking change 56893: Account for field promotion to Null when computing reachability based on equality tests

This change has been implemented, and will roll out in Dart 3.7. On Mon, 14 Oct 2024 at 06:57, Paul

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Breaking change 56893: Account for field promotion to Null when computing reachability based on equality tests

This change has been implemented, and will roll out in Dart 3.7. On Mon, 14 Oct 2024 at 06:57, Paul

10/23/24

Chloe Stefantsova2

9/2/24

Breaking change 56466: Compute closures of type schemas in the upper bound computations in the CFE as specified

This change is being implemented. On Wed, 14 Aug 2024 at 11:26, Chloe Stefantsova <cstefantsova@

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Breaking change 56466: Compute closures of type schemas in the upper bound computations in the CFE as specified

This change is being implemented. On Wed, 14 Aug 2024 at 11:26, Chloe Stefantsova <cstefantsova@

9/2/24

8/29/24

Breaking change 56468: Mark IOOverrides as base

The IOOverrides class specifies the default behavior of several dart:io APIs and can be extended by

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Breaking change 56468: Mark IOOverrides as base

The IOOverrides class specifies the default behavior of several dart:io APIs and can be extended by

8/29/24

8/6/24

Dart 3.5 released

Dart 3.5 is now available! Please note that it contains a number of previously announced breaking

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Dart 3.5 released

Dart 3.5 is now available! Please note that it contains a number of previously announced breaking

8/6/24

Alexander Aprelev

7/25/24

Breaking change 56308: On Windows refer to special null file as '\\?\nul' rather than 'nul'

Recent version of Windows allows to use to long path names up to 32k characters [1]. Use of this

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Breaking change 56308: On Windows refer to special null file as '\\?\nul' rather than 'nul'

Recent version of Windows allows to use to long path names up to 32k characters [1]. Use of this

7/25/24

7/18/24

Breaking change 56065: Change the context for the operand of throw to Object.

This change is being implemented. On Fri, 21 Jun 2024 at 08:30, Paul Berry <paul...@google.com

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Breaking change 56065: Change the context for the operand of throw to Object.

This change is being implemented. On Fri, 21 Jun 2024 at 08:30, Paul Berry <paul...@google.com

7/18/24

6/27/24

Breaking Change 56015: dart:js_interop's ExternalDartReference will no longer implement Object

This change has been implemented in https://github.com/dart-lang/sdk/commit/

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Breaking Change 56015: dart:js_interop's ExternalDartReference will no longer implement Object

This change has been implemented in https://github.com/dart-lang/sdk/commit/

6/27/24

6/27/24

Breaking Changes 55267 and 55508: Change the types of isTruthy, not, and importModule in dart:js_interop

These changes have been implemented in https://github.com/dart-lang/sdk/commit/

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Breaking Changes 55267 and 55508: Change the types of isTruthy, not, and importModule in dart:js_interop

These changes have been implemented in https://github.com/dart-lang/sdk/commit/

6/27/24

5/14/24

Dart 3.4 released

Dart 3.4 is now available! Please note that it contains a number of previously announced breaking

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Dart 3.4 released

Dart 3.4 is now available! Please note that it contains a number of previously announced breaking

5/14/24

5/9/24

Breaking change: 55679

Discussion at: https://github.com/dart-lang/sdk/issues/55679 Change Intent Add a new property to

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Breaking change: 55679

Discussion at: https://github.com/dart-lang/sdk/issues/55679 Change Intent Add a new property to

5/9/24

5/7/24

Breaking change 55436: Make type inference of `e1 ?? e2` consistent.

This change is being implemented now. On Thu, 11 Apr 2024 at 01:11, Paul Berry <paulberry@google.

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Breaking change 55436: Make type inference of `e1 ?? e2` consistent.

This change is being implemented now. On Thu, 11 Apr 2024 at 01:11, Paul Berry <paulberry@google.

5/7/24

5/7/24

Breaking change 55418: Make the context for await expressions consistent

This change is being implemented now. On Wed, 10 Apr 2024 at 02:42, Paul Berry <paulberry@google.

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Breaking change 55418: Make the context for await expressions consistent

This change is being implemented now. On Wed, 10 Apr 2024 at 02:42, Paul Berry <paulberry@google.

5/7/24

2/20/24

Dart 3.3 released

Dart 3.3 is now available! Please note that it contains a number of previously announced breaking

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Dart 3.3 released

Dart 3.3 is now available! Please note that it contains a number of previously announced breaking

2/20/24

2/13/24

Breaking change 54828: Make the type schema for null-aware spread operations consistent

This change was implemented in https://github.com/dart-lang/sdk/commit/

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Breaking change 54828: Make the type schema for null-aware spread operations consistent

This change was implemented in https://github.com/dart-lang/sdk/commit/

2/13/24

1/31/24

Breaking Change 54640: Fix pattern context type schema for cast patterns.

The change was implemented in https://github.com/dart-lang/sdk/commit/

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Breaking Change 54640: Fix pattern context type schema for cast patterns.

The change was implemented in https://github.com/dart-lang/sdk/commit/

1/31/24

12/6/23

Breaking change 54201: dart2js will not minify Invocation.memberName in noSuchMethod

This change has now landed. Mayank Patke | Software Engineer, Dart | fishyt...@google.com | (206)

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Breaking change 54201: dart2js will not minify Invocation.memberName in noSuchMethod

This change has now landed. Mayank Patke | Software Engineer, Dart | fishyt...@google.com | (206)

12/6/23

12/1/23

Breaking change #54002: Modify the 'UP' algorithm to handle intersection types earlier

This breaking change modifies the computation of the standard upper bound (also known as the least

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Breaking change #54002: Modify the 'UP' algorithm to handle intersection types earlier

This breaking change modifies the computation of the standard upper bound (also known as the least

12/1/23

11/15/23

Dart 3.2 released

Dart 3.2 is now available! Please note that it contains a number of previously announced breaking

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Dart 3.2 released

Dart 3.2 is now available! Please note that it contains a number of previously announced breaking

11/15/23

10/27/23

Breaking change #53883: Disambiguate `extension type` to declare an extension type

This breaking change is a grammar modification that disambiguates certain declarations starting with

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Breaking change #53883: Disambiguate `extension type` to declare an extension type

This breaking change is a grammar modification that disambiguates certain declarations starting with

10/27/23

10/25/23

Breaking change 53863: Add lineTerminator field to Stdout

See discussion on breaking change: https://github.com/dart-lang/sdk/issues/53863 Change Intent To

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Breaking change 53863: Add lineTerminator field to Stdout

See discussion on breaking change: https://github.com/dart-lang/sdk/issues/53863 Change Intent To

10/25/23

8/23/23

Breaking change #53325: Include `on` during exhaustiveness checks

Issue #53325 is a breaking change request that proposes a change to the exhaustiveness analysis

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Breaking change #53325: Include `on` during exhaustiveness checks

Issue #53325 is a breaking change request that proposes a change to the exhaustiveness analysis

8/23/23

8/22/23

[Survey response requested] Dart format trailing comma proposal

TL;DR: We're proposing a set of style changes to dart format that would affect about 10% of all

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[Survey response requested] Dart format trailing comma proposal

TL;DR: We're proposing a set of style changes to dart format that would affect about 10% of all

8/22/23

8/17/23

breaking change #53264: HtmlElement cannot be extended

We'd like to do follow-up cleanup in dart:html to remove the ability to extend "native"

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breaking change #53264: HtmlElement cannot be extended

We'd like to do follow-up cleanup in dart:html to remove the ability to extend "native"

8/17/23

8/16/23

Dart 3.1 released

Dart 3.1 is now available! Please note that it contains a number of previously announced breaking

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Dart 3.1 released

Dart 3.1 is now available! Please note that it contains a number of previously announced breaking

8/16/23

8/15/23

Breaking change 53227: Parse folded HTTP field values according to RFC 7230

See discussion on breaking change: https://github.com/dart-lang/sdk/issues/53227 Change Intent The

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Breaking change 53227: Parse folded HTTP field values according to RFC 7230

See discussion on breaking change: https://github.com/dart-lang/sdk/issues/53227 Change Intent The

8/15/23

7/20/23

Breaking change 53005: Remove trailing whitespace from HTTP headers

See discussion on breaking change: https://github.com/dart-lang/sdk/issues/53005 Change Intent The

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Breaking change 53005: Remove trailing whitespace from HTTP headers

See discussion on breaking change: https://github.com/dart-lang/sdk/issues/53005 Change Intent The

7/20/23

Martin Kustermann2

7/11/23

Breaking change 52801: Make utf8.encode() / Utf8Codec.encode() return more precise Uint8List type

The breaking change has now landed on the main branch. On Wed, Jun 28, 2023 at 9:02 AM Martin

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Breaking change 52801: Make utf8.encode() / Utf8Codec.encode() return more precise Uint8List type

The breaking change has now landed on the main branch. On Wed, Jun 28, 2023 at 9:02 AM Martin

7/11/23

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