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).

AngularDart is going all Dart

Until now, the multiple language flavors of Angular 2 were written as TypeScript source, and then automatically compiled to both JavaScript and Dart. We're happy to announce that we’re splitting the Angular 2 codebase into two flavors – a Dart version and a TypeScript/JavaScript version – and creating a dedicated AngularDart team.

This is amazing news for Dart developers because:

The framework will feel more like idiomatic Dart.It will make use of Dart features that couldn't work with the TypeScript flavor. It will be faster.
This is equally great news for our TypeScript and JavaScript developers, by the way. Cleaner API, performance gains, easier contributions. Read more on the Angular blog.

Angular 2 for Dart is used by many teams at Google. Most famously by the AdWords team, but many other Google teams build large, mobile-friendly web apps. Some of the top requests from these teams were: make the API feel like Dart, provide a faster edit-refresh cycle, and improve applicat…

The new AdWords UI uses Dart — we asked why

Google just announced a re-designed AdWords experience. In case you’re not familiar with AdWords: businesses use it to advertise on google.com and partner websites. Advertising makes up majority of Google’s revenue, so when Google decides to completely redo the customer-facing front end to it, it’s a big deal. The Dart team is proud to say that this new front end is built with Dart and Angular 2. Whenever you asked us whether Google is ‘even using Dart for anything,’ this is what we had in mind but couldn’t say aloud. Until now. We asked Joshy Joseph, the primary technical lead on the project, some questions. Joshy is focusing on things like infrastructure, application latency and development velocity, so he’s the right person to ask about Dart.Q: What exactly did we launch on Monday?It’s a complete redesign of the AdWords customer experience that is rolling out slowly as a test to a small initial set of advertisers. The most noticeable thing is probably the Material Design look and f…