Skip to main content

The Dart Team Welcomes TypeScript

It must be something in the water. Gilad Bracha and Lars Bak announced Dart in Aarhus, Denmark about a year ago as a “new programming language for structured web programming”. Yesterday, Anders Hejlsberg, once again in Aarhus, Denmark, announced Microsoft’s new programming language, TypeScript, “a language for application-scale JavaScript development”. Obviously, there’s something about the water in Aarhus that causes language designers to want to tackle the problem of large scale web development. Perhaps that’s why we chose to put the dart2js team in Aarhus full time!

Now that we’ve had a chance to take a look at TypeScript, the Dart team would like to welcome the TypeScript team to the neighborhood. If you already have a large JavaScript codebase, and if you already use Visual Studio, we think that TypeScript could be a great addition to your project.

A year ago, JavaScript programmers would frequently ask us why we needed a new programming language for the web. We argued that developing large web applications was hard, and that optional static type annotations could help. We also argued that the web needed better tooling support. We think that TypeScript has validated both of these statements. Going forward, I think the Dart project and TypeScript will learn a lot from each other.

A lot of people have been wondering what this means for Dart. The fact is, we’re more excited than ever! By making a break from certain parts of JavaScript’s syntax and semantics, we’ve eradicated large classes of bugs caused by various JavaScript gotchas. Nonetheless, last week, the Dart team released its own approach to using JavaScript in Dart apps, and our ongoing work with Web Components and isolates is finally delivering on the long hoped-for dream of encapsulation in the browser.

We’re even more enthusiastic about our plans to go beyond what JavaScript can do natively. Even though Dart can be compiled to JavaScript, Dart’s virtual machine opens up entirely new possibilities. For instance, our early testing with a feature called snapshotting allows Dart apps to start up 10 times faster than normal JavaScript. We also think that Dart is going to be a great fit for mobile. Finally, although V8 performs amazingly well in various JavaScript benchmarks, the Dart VM is already beating it in some of our internal benchmarks.

So once again, we’d like to welcome TypeScript. We think the web has suffered from too little choice for too long, and we think that the future of large-scale web development is looking brighter than ever!

Popular posts from this blog

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…

AngularDart 4

AngularDart v4 is now available. We've been busy since the release angular2 v3.1.0 in May. Not only did we "drop the 2", but we also improved the compiler and tightened up the framework to give you smaller code, we updated the package structure to improve usability, and we added several new features. Check out the updated documentation to get started.
Just angular Upgrading to v4 will require more than updating your version constraint. The package has changed names (back) to angular – dropping the 2. You'll need to update your pubspec.yaml and the corresponding imports in your code. In most instances, find-and-replace should do the trick. Going forward, the package will be called package:angular. We'll just update the version number.
Smaller code The updated compiler in 4.0 allows type-based optimizations that not only improve runtime performance but generate better code because we are able to strongly type templates. A big result of the update is that many ap…