angular2 3.1.0+1


RENAMED to angular.

The angular2 package is deprecated. See the angular package (without the "2") for future updates.

3.1.0+1 #

3.1.0 #

New features #

  • Exposed TouchFunction and ChangeFunction typedefs to make the transition to strong-mode easier for teams relying on these function definitions. We might remove them in a future release when they are no longer needed.

  • Added a flag to use an experimental new compiler that uses the Dart analyzer to gather metadata information. This flag will be turned on by default in 4.0:

        use_analyzer: true

WARNING: Using use_analyzer: true requires discontinuing use of the platform_* options, and fails-fast if both flags are used. See for details.

WARNING: Using use_analyser: true doesn't yet work with most third-party packages due to a bug.

Deprecations #

  • Using dart:mirrors (i.e. running AngularDart without code generation) is now formally deprecated. In 4.0+ code generation will be the only way to run an AngularDart application, even in development mode. Please ensure you are using our transformer:

Bug fixes #

  • CSS errors are now just warnings, and can be ignored. This is due to using a CSS parser for encapsulation - and the AngularDart transformer aggressively runs on all CSS files in a given package. We hope to make this smoother in a future release.

  • Do not generate throwOnChanges checks outside of dev-mode.

Performance #

  • Bypasses the deprecated event plugin system for all native DOM events.
  • At runtime interpolate is now represented by multiple functions (faster).
  • KeyValueDiffer (NgClass, NgStyle) optimized for initial add/removals.
  • No longer generates event handler registrations for directive outputs.

3.0.0 #

New features #

  • composeValidators and composeAsyncValidators now part of the public API.
  • angular2/testing.dart includes a test-only isDebugMode function.
  • (Forms) AbstractControl.markAsDirty now emits a status change event.

Breaking changes #

  • Requires at least Dart SDK 1.23.0.

  • Injecting null is no longer supported.

  • Remove unused useProperty argument in DI Provider api.

  • ReflectionCapabilities.isReflectionEnabled renamed to reflectionEnabled.

  • Malformed CSS warnings are errors now.

  • Removed forms async validators. Alternative:

    control.valueChange((value) {
      rpc.validate(change).then((errors) {
        if (errors != null) control.setErrors(errors);
  • Removed TitleService. To update the title, use dart:html:

    document.title = 'My title';
  • DynamicComponentLoader now has a simplified API:

    loadAsRoot, loadAsRootIntoNode replaced by a single load method that always creates the component root node instead of hoisting into an existing node.

  • Removed viewBindings from Component. This has been interchangeable with viewProviders for a while now.

    BEFORE: dart @Component(viewBindings: const [])

    AFTER: dart @Component(viewProviders: const [])

  • Removed EventManager from the public API. Code generation is now closer to document.addEventListener and having this interception layer would not allow further optimizations.

  • Removed IterableDifferFactory and KeyValueDifferFactory from the public API. We have planned compiler optimizations that will no longer allow overriding our diffing implementations. Looking into alternatives before a final 3.0.0 release that are lower cost.

  • ASYNC_VALIDATORS can no longer return a Stream instance, only Future.

  • The experimental NgTestBed was removed. Use package:angular_test now.

  • By default, the ExceptionHandler is a BrowserExceptionHandler, which prints exceptions to the console. If you don't want this behavior (i.e. releasing to production), make sure to override it.

  • ElementRef.nativeElement is now final (no setter).

  • DOM adapter is now completely removed from the API and generated code

  • A name parameter is now required for all @Pipe(...) definitions:

    BEFORE: dart @Pipe(name: 'uppercase')

    AFTER: dart @Pipe('uppercase')

  • DomEventsPlugin now requires a strongly typed interface to dart:html.

  • Null is no longer propagated as an initial change value. Code should be updated to either deliver a different initial value or components with an @Input() should have an appropriate default value.


    <my-component [value]="null"></my-component>
    String _value;
    set value(String value) {
      _value = value ?? 'Default name';


    String _value = 'Default name';
    set value(String value) { _value = value; }
  • Removed the isFirstChange() method of SimpleChange. Instead, check whether previousValue is null.

  • Removed NgPlural, deprecated as of 2.1.0.

  • Removed ObservableListDiffFactory, deprecated as of 2.1.0.

  • Event handlers are bound at initialization time. Therefore, the following will no longer work, because clickHandler is null during initialization.

        selector: 'my-component',
        template: '<div (click)="clickHandler($event)"></div>')
    class MyComponent {
      Function clickHandler;
  • Removed Component.moduleId, which was unused.

Deprecations #

  • @View will be removed in 4.0, only use @Component instead.
  • EventEmitter is now @Deprecated: Use Stream and StreamController.
  • ngSwitchCase replaces ngSwitchWhen (soft deprecation).
  • XHR is deprecated, along with the runtime/reflective compiler.
  • IterableDiffers and KeyValueDiffers are deprecated. The cost of looking up to see if a custom differ is available is too high for almost no use. Before they're removed, we'll have other customization options.

Bug fixes #

  • Updated various documentation to make cleaner and use Dart, not TS, samples.
  • Perf: Added performance improvements around generated code and type inference.
  • Fix: Key-value differ now detects removals when first key moves.
  • Fix: <ng-content select="..."> does not emit incorrect code (regression).
  • Perf: Optimized how reflective providers are resolved on application startup.
  • ngSwitchWhen now properly compares identity in Dartium.
  • Component/Directive#selector is now a @required property.
  • Angular warns in the console if using Dartium without checked mode.
  • Various performance improvements for both code size and runtime.
  • Various Dart idiomatic/style guide updates to the codebase.
  • ngIf now throws again if the bound value changes during change detection.
  • Fixed a bug where the router didn't work on a root path in IE11.
  • Fixed generated code that caused a strong-mode warning on AppView<...>.
  • Fixed a bug where DDC didn't work properly with "pure" Pipes.
  • Some simple types are now propagated to the generated .template.dart file.
  • When setting up a new NgControl, valueAccessor no longer can throw an NPE
  • Re-enabled strong-mode analysis within the project, and fixed some errors.

Refactoring #

  • We now use the formal <T> generic type syntax for methods, not /*<T>*/.
  • Removed NgZoneImpl, all the code exists in NgZone now.
  • We now generate specific code for view and content children (faster).
  • Projectable nodes now use the visitor pattern in AppView.
  • In generated .template.dart change detected primitives are typed.
  • Moved renderType as a static class member in generated code.

2.2.0 #

API changes #

  • Breaking changes
    • Using @ViewQuery|Children|Content| in a constructor is no longer valid. This caused significant extra code to need to be generated for a case that is relatively rare. Code can safely be moved into a setter in most cases.


class MyComponent {
  QueryList<ChildComponent> _childComponents;

  MyComponent(@ContentChildren(ChildComponent) this._childComponents);


class MyComponent {
  QueryList<ChildComponent> _childComponents;

  set childComponents(QueryList<ChildComponent> childComponents) {
    _childComponents = childComponents;

Bug fixes #

  • Importing angular2/reflection.dart now works properly.

2.1.1 #

API changes #

  • Introduced angular2/reflection.dart as canonical way to opt-in to mirrors. In 2.2.0 it will be considered deprecated to enable runtime reflection by any other means.

2.1.0 #

API changes #

  • Breaking changes
    • NgControlStatus no longer included in COMMON_DIRECTIVES and in FORM_DIRECTIVES. Needs to be manually included in your bootstrap or migrated off of
  • Deprecations
    • Using @Query in a component constructor; move to field-level
    • Renderer: Use dart:html directly
    • NgControlStatus: A form control should set class they are interested in
    • NgPlural: Was never formally supported in Angular Dart. Recommend using package:intl with getters on your @Component pointing to an Intl.message call until we have formal template support (planned)
    • ObservableListDiff: Not properly implemented, will re-introduce later
  • Removed support for InjectorModule - was never formally supported

Bug fixes and other changes #

  • Documentation fixes and cleanups across the codebase
  • Code size and runtime performance improvements across the codebase
  • More reduction of STRONG_MODE exceptions in the compiler
  • Removed InjectorModule code (from TS-transpiler era)
  • Fixed a bug with ExceptionHandler not being called during change detection
  • Fixed a bug where controls were not marked dirty when an error was set

2.0.0 Release #

API changes #

  • Implemented NgTestBed to improve test infrastructure
  • Removed Metadata classes used for angular annotations.
  • Added ComponentState to provide push change detection with better ergonomics and code generation.
  • ViewContainerRef.createEmbeddedView index parameter removed instead introduced insertEmbeddedView.
  • Added support for minimal code generation when user explicitly marks component with preserveWhitespace:false.

Bug fixes and other changes #

  • Improved ngFor performance.
  • Improved shared style host performance.
  • Improved @ViewChild/@ViewChildren performance.
  • Code and documentation cleanups.
  • Strong mode fixes.

2.0.0-beta.22 #

API changes #

  • POTENTIALLY BREAKING Observable features new use the new observable package, instead of observe.
  • Removed Renderer.createViewRoot.

Bug fixes and other changes #

  • Improved compiler errors.
  • Fixes to reduce code size.
  • Support the latest pkg/build.
  • Now require Dart SDK 1.19 at a minimum.
  • Added .analysis_options to enforce a number of style rules.

2.0.0-beta.21 #

Our push towards better performance has started showing results in this release. This update provides 5-10% speedup in components. >20% reduction in Dart code size emitted from compiler.

API changes #

  • Added support for '??' operator in template compiler.
  • Removed unused animation directives to create more Darty/compile time version.
  • Removed unused i18n pipes to prepare for dart:intl based solution.
  • Language facades removed (isPresent, isBlank, getMapKey, normalizeBool, DateWrapper, RegExpWrapper, StringWrapper, NumberWrapper, Math facades, SetWrapper, ListWrapper, MapWrapper, StringMapWrapper, ObservableWrapper, TimerWrapper).
  • Deprecated unused ROUTER_LINK_DSL_TRANSFORM.
  • Refactor(element.dart) is now app_element.dart.
  • AppView moved to app_view. DebugAppView moved to debug/debug_app_view.dart.
  • The deprecated injection Binding and bind have been removed.
  • Remove global events and disposables (instead of :window type targets, use dart APIs).

Bug fixes and other changes #

  • Improved change detection performance.
  • Improved error messages reported by template compiler.
  • Optimized [class.x]="y" type bindings.
  • Switched to js_util for browser_adapter to make angular CSP compliant.
  • Started strongly typing element members in compiled template code.
  • Cheatsheet and code docs updated.
  • Router fixes

2.0.0-beta.20 #

API changes #

  • Added ngBeforeSubmit event to ngForm API to allow better validation.
  • Global events removed from event binding syntax (dart:html APIs provide better alternative).

Bug fixes and other changes #

  • Reduced template code size.
  • Cleanup of facades.
  • Class Documentation updates.
  • ngForm submit changed to sync.
  • Removed disposables in generated template code.

2.0.0-beta.19 #

API changes #

  • Remove existing implementation of web workers, to be replaced in the future with Dart import override for dart:html.

Bug fixes and other changes #

  • Remove throwOnChanges parameter from all change detection calls in generated template.dart.
  • Unused and empty assertArrayOfStrings API removed.
  • Update BrowserDomAdapter from dart:js to package:js.
  • Reset change detection to guard against template exception.
  • Delete unused files.
  • Clean up the NgIf directive and remove facades.
  • Enabled Travis-CI.
  • Update tests that should only run in the browser.
  • Add angular transformer which deletes any pre-existing generated files from Bazel.
  • Add DI library entrypoint to support VM tests.
  • Fix the Math facade (improper annotation): @Deprecated(description).
  • Clean up animation classes.
  • Remove library name declarations.
  • Run dart formatter on all code.
  • Remove unused testing/lang_utils.dart.

2.0.0-beta.18 #

This is the first release of Angular 2 for Dart that is written directly in Dart, instead of generated from TypeScript.

API changes #

The Provider constructor and provide() function are now more intuitive when they have a single argument.

Before, const Provider(Foo) or provide(Foo) would provide a null object. To provide a Foo object, you had to use const Provider(Foo, useClass:Foo) or provide(Foo, useClass:Foo). Now you can omit the useClass:Foo. Either of the following provides a Foo instance:

const Provider(Foo)
// or

If you want the old behavior, change your code to specify useValue:

const Provider(Foo, useValue: null)
// or
provide(Foo, useValue: null)

Known issues #

Bug fixes and other changes #

  • Fix lower bound of pkg/build dependency.
  • Fixes for dependency upper bounds: build and protobuf.
  • Bumping min version of pkg/intl and pkg version.
  • Remove redundant declaration of el.
  • Security Update. Secure Contextual Escaping Implementation.
  • Fix Intl number formatting.
  • Enforce strong mode for angular2.dart.
  • Updating README and for first release.
  • Enforce dartfmt for dart/angular2.
  • Add //dart/angular2/build_defs with default resolved_identifiers.
  • Import cleanup.
  • Annotate browser-only tests.
  • Include .gitignore in files sent to GitHub.
  • Fix a strong mode error in angular2 (strong mode type inference miss).
  • Add compiler tests.
  • Delete unused libraries in lib/src.
  • Updated pubspec: authors, description, homepage.
  • Angular strong mode fixes for DDC support.
  • Add _LoggerConsole implementation of Console for the TemplateCompiler.
  • Mark Binding and bind() as deprecated. Replaced by Provider and provide().

Use this package as a library

1. Depend on it

Add this to your package's pubspec.yaml file:

  angular2: ^3.1.0+1

2. Install it

You can install packages from the command line:

with pub:

$ pub get

Alternatively, your editor might support pub get. Check the docs for your editor to learn more.

3. Import it

Now in your Dart code, you can use:

import 'package:angular2/angular2.dart';
Describes how popular the package is relative to other packages. [more]
Code health derived from static analysis. [more]
Reflects how tidy and up-to-date the package is. [more]
Weighted score of the above. [more]
Learn more about scoring.

This package is not analyzed, because it is discontinued.

The package version is not analyzed, because it does not support Dart 2. Until this is resolved, the package will receive a health and maintenance score of 0.

Analysis issues and suggestions

Support Dart 2 in pubspec.yaml.

The SDK constraint in pubspec.yaml doesn't allow the Dart 2.0.0 release. For information about upgrading it to be Dart 2 compatible, please see


Package Constraint Resolved Available
Direct dependencies
Dart SDK >=1.23.0 <2.0.0