Dart Announcements

1–30 of 369

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

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Apr 18

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

`isTruthy` and `not` both return a `bool` in `dart:js_interop`. In order to keep these operators

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

`isTruthy` and `not` both return a `bool` in `dart:js_interop`. In order to keep these operators

Apr 18

Apr 11

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

The rules used by the compiler front end to perform type inference on if-null expressions (

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

The rules used by the compiler front end to perform type inference on if-null expressions (

Apr 11

Apr 10

Breaking change 55418: Make the context for await expressions consistent

The context used by the compiler front end to perform type inference on the operand of await

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Breaking change 55418: Make the context for await expressions consistent

The context used by the compiler front end to perform type inference on the operand of await

Apr 10

Feb 20

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

Feb 20

Feb 13

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/

Feb 13

Jan 31

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/

Jan 31

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

5/31/23

Breaking change [SDK #52575]: Stop supporting script tag based execution of part files

The intended change is that part files should no longer support script tags. It is currently

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Breaking change [SDK #52575]: Stop supporting script tag based execution of part files

The intended change is that part files should no longer support script tags. It is currently

5/31/23

5/18/23

Breaking change 52444: Make dart:io Platform abstract

See discussion on breaking change: https://github.com/dart-lang/sdk/issues/52444 Change Intent Add

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Breaking change 52444: Make dart:io Platform abstract

See discussion on breaking change: https://github.com/dart-lang/sdk/issues/52444 Change Intent Add

5/18/23

5/10/23

Dart 3 released

Dart 3 is now available! Please note that it contains a number of previously announced breaking

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Dart 3 released

Dart 3 is now available! Please note that it contains a number of previously announced breaking

5/10/23

4/12/23

Breaking change 52027: Make dart:io FileSystemEvent sealed

Change Intent Make FileSystemEvent sealed. Justification It would be nice to be able to exhaustively

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Breaking change 52027: Make dart:io FileSystemEvent sealed

Change Intent Make FileSystemEvent sealed. Justification It would be nice to be able to exhaustively

4/12/23

3/21/23

Breaking change [#51799]: Dart web libraries will null assert native APIs in Dart 3

Native web library APIs, like the ones in dart:html, will have their return values be null-asserted

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Breaking change [#51799]: Dart web libraries will null assert native APIs in Dart 3

Native web library APIs, like the ones in dart:html, will have their return values be null-asserted

3/21/23

2/6/23

Breaking change 51035: Change HttpProfileRequestRef.id type from String to int

The change has now been landed from https://dart-review.googlesource.com/c/sdk/+/280020 On Thursday,

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Breaking change 51035: Change HttpProfileRequestRef.id type from String to int

The change has now been landed from https://dart-review.googlesource.com/c/sdk/+/280020 On Thursday,

2/6/23

1/26/23

Dart 2.19 released

The Dart SDK version 2.19 is now available. Please note that it contains a number of previously

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Dart 2.19 released

The Dart SDK version 2.19 is now available. Please note that it contains a number of previously

1/26/23

1/6/23

Breaking change 50902: compile-time error for continue statement having invalid target

(on behalf of Ahmed Ashour <asas...@yahoo.com>) Summary: a compile-time error will be

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Breaking change 50902: compile-time error for continue statement having invalid target

(on behalf of Ahmed Ashour <asas...@yahoo.com>) Summary: a compile-time error will be

1/6/23

Michael Thomsen

12/15/22

Breaking change 49529: Dart 3 removal of deprecated core library APIs

Tracking issue: https://github.com/dart-lang/sdk/issues/49529 Change A number of already deprecated

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Breaking change 49529: Dart 3 removal of deprecated core library APIs

Tracking issue: https://github.com/dart-lang/sdk/issues/49529 Change A number of already deprecated

12/15/22

11/29/22

Breaking change 50576: Fix the behavior of Socket.address

See discussion on breaking change: https://github.com/dart-lang/sdk/issues/50576 Change Socket.

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Breaking change 50576: Fix the behavior of Socket.address

See discussion on breaking change: https://github.com/dart-lang/sdk/issues/50576 Change Socket.

11/29/22

11/9/22

Considering discontinuing package:oauth2

Hi! We're considering discontinuing package:oauth2. package:oauth2 is a client library for

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Considering discontinuing package:oauth2

Hi! We're considering discontinuing package:oauth2. package:oauth2 is a client library for

11/9/22

10/17/22

Breaking change 50231: Remove Observatory from the Dart VM

The link above doesn't point to the right issue. The right issue can be accessed here. On Monday,

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Breaking change 50231: Remove Observatory from the Dart VM

The link above doesn't point to the right issue. The right issue can be accessed here. On Monday,

10/17/22

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