4.0.0-alpha+1

4.0.0-alpha+1

New features

• Inheritence for both component and directive metadata is now complete! Any
  field or method-level annotations (@Input, @Output,
  @ViewChild|Children, @ContentChild|Children) are now inherited through
  super types (extends, implements, with) #231:

class BaseComponent {
  @Input()
  String name;
}

// Also has an input called "name" now!
@Component(selector: 'comp')
class ConcreteComponent extends BaseComponent {}

• Inputs that are of type bool now receive a default value of true instead
  of a value of null or an empty string. This allows a much more HTML-friendly
  syntax for your components:

<!-- All of these set a value of disabled=true -->
<fancy-button disabled></fancy-button>
<fancy-button [disabled]></fancy-button>
<fancy-button [disabled]="true"></fancy-button>

<!-- Value of disabled=false -->
<fancy-button [disabled]="false"></fancy-button>

@Component()
class FancyButton {
  @Input()
  bool disabled = false;
}

Breaking changes

• Removed angular/common.dart; replace imports with angular/angular.dart.
• Removed angular/compiler.dart; Compiler should only be invoked via the
  transformers or via pkg:build directly using angular/source_gen.dart.
• Deprecated @View() annotation was completely removed.
• Deprecated second parameter to ExceptionHandler was completely removed.

Bug fixes

• Fixed a bug where @deferred did not work nested inside of <template>:

<template [ngIf]="someCondition">
  <expensive-comp @deferred></expensive-comp>
</template>

• ngForm now allows onSubmit to be called with a null value.

• Using inputs|outputs in the @Component annotation to rename an existing
  @Input() or @Output() now logs and fails the build during compilation.

• Symbol collisions with dart:html no longer cause a runtime exception, all
  framework use of dart:html is now scoped behind a prefixed import.