Skip to main content

Dart Editor cleans up your code for M1

Posted by Devon Carew

A new Dart Editor build is available at www.dartlang.org/editorChanges include:
  • Wondering about M1 language changes? Worried about having to update your code? Worry no more! We have a new M1 language migration wizard which'll do that work for you! Right click on your project and choose 'Clean up...'. We've implemented cleanups for catch blocks, the new getter syntax, operator equals, and library/import/source changes. Please note, the last two changes are not yet supported across all platforms.



  • We've added the ability to write hooks into the Editor's build system. If a build.dart script exists in a project, we'll invoke it as part of the Editor's build process. This allows for custom processing of changed resources, like for templating systems, generating Dart code, or scss --> css processing. There are sample scripts available at dart/samples/buildhook1 and dart/samples/buildhook2, as well as online at https://github.com/dart-lang/dart-web-components/blob/master/build.dart.
  • Our type inference engine has been enhanced to add support for inferring types from dart:html select().
  • The type inference engine now handles the case where a variable is assigned different types at different times, and will show you the intersection of legal method and field references. In addition we now infer the type of List and Map literals.
  • Added basic scss (http://sass-lang.com/) syntax highlighting.
  • dart:mirrors has been added to the SDK; the editor can now resolve the mirrors library and the types within it.
  • Added warnings for use of obsolete getter and catch syntaxes.
  • We now highlight single line /// dartdoc comments.
  • We now do a better job of displaying when the debugger halts at an uncaught exception.
  • Fixed an issue with stepping into user libraries in the Dartium debugger.
  • Semantic highlighting tweaks and fixes.
  • General fixes and enhancements to the rename refactoring, code completion, the extract variable refactoring, hyperlinking, searchbox UX, and the debugger UX.
As always, view the changelog for the full list of changes, and to get started with the Editor see our tutorial.

Popular posts from this blog

Dart in 2016: The fastest growing programming language at Google, 2nd fastest growing in TIOBE Index

Dart was the fastest growing programming language at Google in 2016 with millions of lines of code written. It also made it to TIOBE Index Top 20 this month (see TIOBE's methodology).

It takes time to build something as ambitious as Dart and, in some ways, Dart is still in its infancy. But we're glad the hard work is starting to pay off.

Many thanks to our amazing community!

We're going to celebrate by ... releasing 1.22 next week (as per our usual 6 week release schedule).

A stronger Dart for everyone

We are constantly asking ourselves:
How do we make developers even more productive when writing Dart apps? We believe that a critical part of the answer to this question is to make strongmode – a sound static type system for Dart – the standard for all Dart developers.

Teams that use Dart to build apps like Soundtrap, AdWords, AdSense, and Greentea say they really enjoy using strong mode features, such as early error detection. In fact, teams that have switched completely to strong mode cite not only early error detection but also better code readability and maintainability as major benefits. We hear this both from small teams and – even more so – from large teams with hundreds of developers writing and maintaining millions of lines of Dart code. As Björn Sperber from Soundtrap says,
Strong mode and the smooth integration with IntelliJ is a joy to use and a huge improvement. If you’ve tried out Flutter, you’ve already used strong mode checks from the Dart analyzer.

Given the benefits …

AngularDart 3.0: Easy upgrade, better performance

AngularDart 3.0 is now available. It brings better performance and smaller generated code, while also making you more productive.


Version 3.0 is an evolution: although it has some breaking changes (detailed below), it is a smooth upgrade due to minimal public API adjustments. Most of the progress is under the hood—in code quality, stability, generated code size, performance, and developer experience.

Code quality:
2731 instances of making the framework code more type safe (using sound Dart).The AngularDart framework code size is down by 12%.Many additional style updates to the codebase:Changed to use idiomatic <T> for generic methods.Removed NgZoneImpl, all the code exists in NgZone now.Stability:
Many CSS encapsulation fixes due to update with csslib package.Fixed bugs with IE11.

Performance:
For the Mail sample app, we see 30% faster time-to-interactive (currently 3812 ms on a simulated 3G connection, measured via Lighthouse).Our large app benchmark shows 2x faster render times of…