style(render): idiomatic TS

modules/angular2/src/render/api.ts

@@ -20,13 +20,7 @@ import {ASTWithSource} from 'angular2/change_detection';
  *   its output will be stored in precompiled templates.
  */
 export class EventBinding {
-  fullName: string;  // name/target:name, e.g "click", "window:resize"
-  source: ASTWithSource;
-
-  constructor(fullName: string, source: ASTWithSource) {
-    this.fullName = fullName;
-    this.source = source;
-  }
+  constructor(public fullName: string, public source: ASTWithSource) {}
 }
 
 export class ElementBinder {

modules/angular2/src/render/dom/compiler/compile_control.ts

@@ -8,20 +8,13 @@ import {CompileStep} from './compile_step';
  * Right now it only allows to add a parent element.
  */
 export class CompileControl {
-  _steps: List<CompileStep>;
-  _currentStepIndex: number;
-  _parent: CompileElement;
-  _results;
-  _additionalChildren;
+  _currentStepIndex: number = 0;
+  _parent: CompileElement = null;
+  _results = null;
+  _additionalChildren = null;
   _ignoreCurrentElement: boolean;
 
-  constructor(steps) {
-    this._steps = steps;
-    this._currentStepIndex = 0;
-    this._parent = null;
-    this._results = null;
-    this._additionalChildren = null;
-  }
+  constructor(public _steps: List<CompileStep>) {}
 
   // only public so that it can be used by compile_pipeline
   internalProcess(results, startStepIndex, parent: CompileElement, current: CompileElement) {

modules/angular2/src/render/dom/compiler/compile_element.ts

@@ -10,30 +10,19 @@ import {ProtoViewBuilder, ElementBinderBuilder} from '../view/proto_view_builder
  * by the CompileSteps starting out with the pure HTMLElement.
  */
 export class CompileElement {
-  element;
-  _attrs: Map<string, string>;
-  _classList: List<string>;
-  isViewRoot: boolean;
-  inheritedProtoView: ProtoViewBuilder;
-  distanceToInheritedBinder: number;
-  inheritedElementBinder: ElementBinderBuilder;
-  compileChildren: boolean;
+  _attrs: Map<string, string> = null;
+  _classList: List<string> = null;
+  isViewRoot: boolean = false;
+  // inherited down to children if they don't have an own protoView
+  inheritedProtoView: ProtoViewBuilder = null;
+  distanceToInheritedBinder: number = 0;
+  // inherited down to children if they don't have an own elementBinder
+  inheritedElementBinder: ElementBinderBuilder = null;
+  compileChildren: boolean = true;
   elementDescription: string;  // e.g. '<div [class]="foo">' : used to provide context in case of
                                // error
 
-  constructor(element, compilationUnit = '') {
-    this.element = element;
-    this._attrs = null;
-    this._classList = null;
-    this.isViewRoot = false;
-    // inherited down to children if they don't have
-    // an own protoView
-    this.inheritedProtoView = null;
-    // inherited down to children if they don't have
-    // an own elementBinder
-    this.inheritedElementBinder = null;
-    this.distanceToInheritedBinder = 0;
-    this.compileChildren = true;
+  constructor(public element, compilationUnit: string = '') {
     // description is calculated here as compilation steps may change the element
     var tplDesc = assertionsEnabled() ? getElementDescription(element) : null;
     if (compilationUnit !== '') {

modules/angular2/src/render/dom/compiler/compile_step_factory.ts

@@ -18,14 +18,7 @@ export class CompileStepFactory {
 }
 
 export class DefaultStepFactory extends CompileStepFactory {
-  _parser: Parser;
-  _shadowDomStrategy: ShadowDomStrategy;
-
-  constructor(parser: Parser, shadowDomStrategy) {
-    super();
-    this._parser = parser;
-    this._shadowDomStrategy = shadowDomStrategy;
-  }
+  constructor(public _parser: Parser, public _shadowDomStrategy: ShadowDomStrategy) { super(); }
 
   createSteps(template: ViewDefinition, subTaskPromises: List<Promise<any>>) {
     return [

modules/angular2/src/render/dom/compiler/compiler.ts

@@ -25,15 +25,10 @@ import {PropertySetterFactory} from '../view/property_setter_factory';
  * the CompilePipeline and the CompileSteps.
  */
 export class DomCompiler extends RenderCompiler {
-  _templateLoader: TemplateLoader;
-  _stepFactory: CompileStepFactory;
-  _propertySetterFactory: PropertySetterFactory;
+  _propertySetterFactory: PropertySetterFactory = new PropertySetterFactory();
 
-  constructor(stepFactory: CompileStepFactory, templateLoader: TemplateLoader) {
+  constructor(public _stepFactory: CompileStepFactory, public _templateLoader: TemplateLoader) {
     super();
-    this._templateLoader = templateLoader;
-    this._stepFactory = stepFactory;
-    this._propertySetterFactory = new PropertySetterFactory();
   }
 
   compile(template: ViewDefinition): Promise<ProtoViewDto> {

modules/angular2/src/render/dom/compiler/directive_parser.ts

@@ -18,25 +18,18 @@ import {CompileControl} from './compile_control';
 
 import {DirectiveMetadata} from '../../api';
 import {dashCaseToCamelCase, camelCaseToDashCase, EVENT_TARGET_SEPARATOR} from '../util';
-import {
-  DirectiveBuilder
-} from '../view/proto_view_builder'
+import {DirectiveBuilder} from '../view/proto_view_builder';
 
-    /**
-     * Parses the directives on a single element. Assumes ViewSplitter has already created
-     * <template> elements for template directives.
-     */
-    export class DirectiveParser implements CompileStep {
-  _selectorMatcher: SelectorMatcher;
-  _directives: List<DirectiveMetadata>;
-  _parser: Parser;
+/**
+ * Parses the directives on a single element. Assumes ViewSplitter has already created
+ * <template> elements for template directives.
+ */
+export class DirectiveParser implements CompileStep {
+  _selectorMatcher: SelectorMatcher = new SelectorMatcher();
 
-  constructor(parser: Parser, directives: List<DirectiveMetadata>) {
-    this._parser = parser;
-    this._selectorMatcher = new SelectorMatcher();
-    this._directives = directives;
-    for (var i = 0; i < directives.length; i++) {
-      var directive = directives[i];
+  constructor(public _parser: Parser, public _directives: List<DirectiveMetadata>) {
+    for (var i = 0; i < _directives.length; i++) {
+      var directive = _directives[i];
       var selector = CssSelector.parse(directive.selector);
       this._ensureComponentOnlyHasElementSelector(selector, directive);
       this._selectorMatcher.addSelectables(selector, i);

modules/angular2/src/render/dom/compiler/property_binding_parser.ts

@@ -23,9 +23,7 @@ var BIND_NAME_REGEXP = RegExpWrapper.create(
  * Parses the property bindings on a single element.
  */
 export class PropertyBindingParser implements CompileStep {
-  _parser: Parser;
-
-  constructor(parser: Parser) { this._parser = parser; }
+  constructor(public _parser: Parser) {}
 
   process(parent: CompileElement, current: CompileElement, control: CompileControl) {
     var attrs = current.attrs();

modules/angular2/src/render/dom/compiler/selector.ts

@@ -26,10 +26,11 @@ var _SELECTOR_REGEXP = RegExpWrapper.create(
  * of selecting subsets out of them.
  */
 export class CssSelector {
-  element: string;
-  classNames: List<string>;
-  attrs: List<string>;
-  notSelectors: List<CssSelector>;
+  element: string = null;
+  classNames: List<string> = [];
+  attrs: List<string> = [];
+  notSelectors: List<CssSelector> = [];
+
   static parse(selector: string): List<CssSelector> {
     var results = ListWrapper.create();
     var _addResult = (res, cssSel) => {
@@ -78,13 +79,6 @@ export class CssSelector {
     return results;
   }
 
-  constructor() {
-    this.element = null;
-    this.classNames = ListWrapper.create();
-    this.attrs = ListWrapper.create();
-    this.notSelectors = ListWrapper.create();
-  }
-
   isElementSelector(): boolean {
     return isPresent(this.element) && ListWrapper.isEmpty(this.classNames) &&
            ListWrapper.isEmpty(this.attrs) && this.notSelectors.length === 0;
@@ -147,26 +141,13 @@ export class SelectorMatcher {
     return notMatcher;
   }
 
-  private _elementMap: Map<string, List<string>>;
-  private _elementPartialMap: Map<string, SelectorMatcher>;
-  private _classMap: Map<string, List<string>>;
-  private _classPartialMap: Map<string, SelectorMatcher>;
-  private _attrValueMap: Map<string, Map<string, List<string>>>;
-  private _attrValuePartialMap: Map<string, Map<string, SelectorMatcher>>;
-  private _listContexts: List<SelectorListContext>;
-
-  constructor() {
-    this._elementMap = MapWrapper.create();
-    this._elementPartialMap = MapWrapper.create();
-
-    this._classMap = MapWrapper.create();
-    this._classPartialMap = MapWrapper.create();
-
-    this._attrValueMap = MapWrapper.create();
-    this._attrValuePartialMap = MapWrapper.create();
-
-    this._listContexts = ListWrapper.create();
-  }
+  private _elementMap: Map<string, List<string>> = MapWrapper.create();
+  private _elementPartialMap: Map<string, SelectorMatcher> = MapWrapper.create();
+  private _classMap: Map<string, List<string>> = MapWrapper.create();
+  private _classPartialMap: Map<string, SelectorMatcher> = MapWrapper.create();
+  private _attrValueMap: Map<string, Map<string, List<string>>> = MapWrapper.create();
+  private _attrValuePartialMap: Map<string, Map<string, SelectorMatcher>> = MapWrapper.create();
+  private _listContexts: List<SelectorListContext> = [];
 
   addSelectables(cssSelectors: List<CssSelector>, callbackCtxt?: any) {
     var listContext = null;
@@ -192,7 +173,6 @@ export class SelectorMatcher {
     var attrs = cssSelector.attrs;
     var selectable = new SelectorContext(cssSelector, callbackCtxt, listContext);
 
-
     if (isPresent(element)) {
       var isTerminal = attrs.length === 0 && classNames.length === 0;
       if (isTerminal) {
@@ -353,27 +333,18 @@ export class SelectorMatcher {
 
 
 class SelectorListContext {
-  selectors: List<CssSelector>;
-  alreadyMatched: boolean;
+  alreadyMatched: boolean = false;
 
-  constructor(selectors: List<CssSelector>) {
-    this.selectors = selectors;
-    this.alreadyMatched = false;
-  }
+  constructor(public selectors: List<CssSelector>) {}
 }
 
 // Store context to pass back selector and context when a selector is matched
 class SelectorContext {
-  selector: CssSelector;
   notSelectors: List<CssSelector>;
-  cbContext;  // callback context
-  listContext: SelectorListContext;
 
-  constructor(selector: CssSelector, cbContext: any, listContext: SelectorListContext) {
-    this.selector = selector;
+  constructor(public selector: CssSelector, public cbContext: any,
+              public listContext: SelectorListContext) {
     this.notSelectors = selector.notSelectors;
-    this.cbContext = cbContext;
-    this.listContext = listContext;
   }
 
   finalize(cssSelector: CssSelector, callback /*: (CssSelector, any) => void*/) {

modules/angular2/src/render/dom/compiler/template_loader.ts

@@ -15,13 +15,9 @@ import {UrlResolver} from 'angular2/src/services/url_resolver';
  */
 @Injectable()
 export class TemplateLoader {
-  _xhr: XHR;
-  _htmlCache: StringMap<string, /*element*/ any>;
+  _htmlCache: StringMap<string, /*element*/ any> = StringMapWrapper.create();
 
-  constructor(xhr: XHR, urlResolver: UrlResolver) {
-    this._xhr = xhr;
-    this._htmlCache = StringMapWrapper.create();
-  }
+  constructor(public _xhr: XHR, urlResolver: UrlResolver) {}
 
   load(template: ViewDefinition): Promise</*element*/ any> {
     if (isPresent(template.template)) {

modules/angular2/src/render/dom/compiler/text_interpolation_parser.ts

@@ -11,9 +11,7 @@ import {CompileControl} from './compile_control';
  * Parses interpolations in direct text child nodes of the current element.
  */
 export class TextInterpolationParser implements CompileStep {
-  _parser: Parser;
-
-  constructor(parser: Parser) { this._parser = parser; }
+  constructor(public _parser: Parser) {}
 
   process(parent: CompileElement, current: CompileElement, control: CompileControl) {
     if (!current.compileChildren) {

modules/angular2/src/render/dom/compiler/view_splitter.ts

@@ -26,9 +26,7 @@ import {dashCaseToCamelCase} from '../util';
  * which should not descend into the nested view.
  */
 export class ViewSplitter implements CompileStep {
-  _parser: Parser;
-
-  constructor(parser: Parser) { this._parser = parser; }
+  constructor(public _parser: Parser) {}
 
   process(parent: CompileElement, current: CompileElement, control: CompileControl) {
     var attrs = current.attrs();

modules/angular2/src/render/dom/dom_renderer.ts

@@ -26,15 +26,11 @@ export const DOCUMENT_TOKEN = CONST_EXPR(new OpaqueToken('DocumentToken'));
 
 @Injectable()
 export class DomRenderer extends Renderer {
-  _eventManager: EventManager;
-  _shadowDomStrategy: ShadowDomStrategy;
   _document;
 
-  constructor(eventManager: EventManager, shadowDomStrategy: ShadowDomStrategy,
+  constructor(public _eventManager: EventManager, public _shadowDomStrategy: ShadowDomStrategy,
               @Inject(DOCUMENT_TOKEN) document) {
     super();
-    this._eventManager = eventManager;
-    this._shadowDomStrategy = shadowDomStrategy;
     this._document = document;
   }
 

modules/angular2/src/render/dom/events/event_manager.ts

@@ -6,14 +6,9 @@ import {NgZone} from 'angular2/src/core/zone/ng_zone';
 var BUBBLE_SYMBOL = '^';
 
 export class EventManager {
-  _plugins: List<EventManagerPlugin>;
-  _zone: NgZone;
-
-  constructor(plugins: List<EventManagerPlugin>, zone: NgZone) {
-    this._zone = zone;
-    this._plugins = plugins;
-    for (var i = 0; i < plugins.length; i++) {
-      plugins[i].manager = this;
+  constructor(public _plugins: List<EventManagerPlugin>, public _zone: NgZone) {
+    for (var i = 0; i < _plugins.length; i++) {
+      _plugins[i].manager = this;
     }
   }
 

modules/angular2/src/render/dom/shadow_dom/content_tag.ts

@@ -14,7 +14,7 @@ class ContentStrategy {
  * and thus does not affect redistribution.
  */
 class RenderedContent extends ContentStrategy {
-  beginScript;
+  beginScript: any;
   endScript;
 
   constructor(contentEl) {
@@ -47,12 +47,9 @@ class RenderedContent extends ContentStrategy {
  * and thus does not get rendered but only affect the distribution of its parent component.
  */
 class IntermediateContent extends ContentStrategy {
-  destinationLightDom: ldModule.LightDom;
-
-  constructor(destinationLightDom: ldModule.LightDom) {
+  constructor(public destinationLightDom: ldModule.LightDom) {
     super();
     this.nodes = [];
-    this.destinationLightDom = destinationLightDom;
   }
 
   insert(nodes: List</*node*/ any>) {
@@ -63,15 +60,9 @@ class IntermediateContent extends ContentStrategy {
 
 
 export class Content {
-  select: string;
-  private _strategy: ContentStrategy;
-  contentStartElement;
+  private _strategy: ContentStrategy = null;
 
-  constructor(contentStartEl, selector: string) {
-    this.select = selector;
-    this.contentStartElement = contentStartEl;
-    this._strategy = null;
-  }
+  constructor(public contentStartElement, public select: string) {}
 
   init(destinationLightDom: ldModule.LightDom) {
     this._strategy = isPresent(destinationLightDom) ? new IntermediateContent(destinationLightDom) :

modules/angular2/src/render/dom/shadow_dom/emulated_scoped_shadow_dom_strategy.ts

@@ -27,11 +27,8 @@ import {
  * - see `ShadowCss` for more information and limitations.
  */
 export class EmulatedScopedShadowDomStrategy extends EmulatedUnscopedShadowDomStrategy {
-  styleInliner: StyleInliner;
-
-  constructor(styleInliner: StyleInliner, styleUrlResolver: StyleUrlResolver, styleHost) {
+  constructor(public styleInliner: StyleInliner, styleUrlResolver: StyleUrlResolver, styleHost) {
     super(styleUrlResolver, styleHost);
-    this.styleInliner = styleInliner;
   }
 
   processStyleElement(hostComponentId: string, templateUrl: string, styleEl): Promise<any> {

modules/angular2/src/render/dom/shadow_dom/emulated_unscoped_shadow_dom_strategy.ts

@@ -19,14 +19,7 @@ import {insertSharedStyleText} from './util';
  * - you can **not** use shadow DOM specific selectors in the styles
  */
 export class EmulatedUnscopedShadowDomStrategy extends ShadowDomStrategy {
-  styleUrlResolver: StyleUrlResolver;
-  styleHost;
-
-  constructor(styleUrlResolver: StyleUrlResolver, styleHost) {
-    super();
-    this.styleUrlResolver = styleUrlResolver;
-    this.styleHost = styleHost;
-  }
+  constructor(public styleUrlResolver: StyleUrlResolver, public styleHost) { super(); }
 
   hasNativeContentElement(): boolean { return false; }
 

modules/angular2/src/render/dom/shadow_dom/light_dom.ts

@@ -18,17 +18,14 @@ export class LightDom {
   // The light DOM of the element is enclosed inside the lightDomView
   lightDomView: viewModule.DomView;
   // The shadow DOM
-  shadowDomView: viewModule.DomView;
+  shadowDomView: viewModule.DomView = null;
   // The nodes of the light DOM
   nodes: List</*node*/ any>;
-  private _roots: List<_Root>;
+  private _roots: List<_Root> = null;
 
   constructor(lightDomView: viewModule.DomView, element) {
     this.lightDomView = lightDomView;
     this.nodes = DOM.childNodesAsList(element);
-
-    this._roots = null;
-    this.shadowDomView = null;
   }
 
   attachShadowDomView(shadowDomView: viewModule.DomView) { this.shadowDomView = shadowDomView; }

modules/angular2/src/render/dom/shadow_dom/native_shadow_dom_strategy.ts

@@ -14,12 +14,7 @@ import {ShadowDomStrategy} from './shadow_dom_strategy';
  */
 @Injectable()
 export class NativeShadowDomStrategy extends ShadowDomStrategy {
-  styleUrlResolver: StyleUrlResolver;
-
-  constructor(styleUrlResolver: StyleUrlResolver) {
-    super();
-    this.styleUrlResolver = styleUrlResolver;
-  }
+  constructor(public styleUrlResolver: StyleUrlResolver) { super(); }
 
   prepareShadowRoot(el) { return DOM.createShadowRoot(el); }
 

modules/angular2/src/render/dom/shadow_dom/shadow_css.ts

@@ -137,9 +137,9 @@ import {
 */
 
 export class ShadowCss {
-  strictStyling: boolean;
+  strictStyling: boolean = true;
 
-  constructor() { this.strictStyling = true; }
+  constructor() {}
 
   /*
   * Shim a style element with the given selector. Returns cssText that can

modules/angular2/src/render/dom/shadow_dom/shadow_dom_compile_step.ts

@@ -11,16 +11,8 @@ import {ViewDefinition} from '../../api';
 import {ShadowDomStrategy} from './shadow_dom_strategy';
 
 export class ShadowDomCompileStep implements CompileStep {
-  _shadowDomStrategy: ShadowDomStrategy;
-  _template: ViewDefinition;
-  _subTaskPromises: List<Promise<any>>;
-
-  constructor(shadowDomStrategy: ShadowDomStrategy, template: ViewDefinition,
-              subTaskPromises: List<Promise<any>>) {
-    this._shadowDomStrategy = shadowDomStrategy;
-    this._template = template;
-    this._subTaskPromises = subTaskPromises;
-  }
+  constructor(public _shadowDomStrategy: ShadowDomStrategy, public _template: ViewDefinition,
+              public _subTaskPromises: List<Promise<any>>) {}
 
   process(parent: CompileElement, current: CompileElement, control: CompileControl) {
     var tagName = DOM.tagName(current.element).toUpperCase();

modules/angular2/src/render/dom/shadow_dom/style_inliner.ts

@@ -25,15 +25,8 @@ import {
  */
 @Injectable()
 export class StyleInliner {
-  _xhr: XHR;
-  _urlResolver: UrlResolver;
-  _styleUrlResolver: StyleUrlResolver;
-
-  constructor(xhr: XHR, styleUrlResolver: StyleUrlResolver, urlResolver: UrlResolver) {
-    this._xhr = xhr;
-    this._urlResolver = urlResolver;
-    this._styleUrlResolver = styleUrlResolver;
-  }
+  constructor(public _xhr: XHR, public _styleUrlResolver: StyleUrlResolver,
+              public _urlResolver: UrlResolver) {}
 
   /**
    * Inline the @imports rules in the given CSS text.

modules/angular2/src/render/dom/shadow_dom/style_url_resolver.ts

@@ -10,9 +10,7 @@ import {UrlResolver} from 'angular2/src/services/url_resolver';
  */
 @Injectable()
 export class StyleUrlResolver {
-  _resolver: UrlResolver;
-
-  constructor(resolver: UrlResolver) { this._resolver = resolver; }
+  constructor(public _resolver: UrlResolver) {}
 
   resolveUrls(cssText: string, baseUrl: string) {
     cssText = this._replaceUrls(cssText, _cssUrlRe, baseUrl);

modules/angular2/src/render/dom/view/element_binder.ts

@@ -49,25 +49,9 @@ export class ElementBinder {
 }
 
 export class Event {
-  name: string;
-  target: string;
-  fullName: string;
-
-  constructor(name: string, target: string, fullName: string) {
-    this.name = name;
-    this.target = target;
-    this.fullName = fullName;
-  }
+  constructor(public name: string, public target: string, public fullName: string) {}
 }
 
 export class HostAction {
-  actionName: string;
-  actionExpression: string;
-  expression: AST;
-
-  constructor(actionName: string, actionExpression: string, expression: AST) {
-    this.actionName = actionName;
-    this.actionExpression = actionExpression;
-    this.expression = expression;
-  }
+  constructor(public actionName: string, public actionExpression: string, public expression: AST) {}
 }

modules/angular2/src/render/dom/view/property_setter_factory.ts

@@ -22,13 +22,11 @@ export class PropertySetterFactory {
 
   private _lazyPropertySettersCache: StringMap<string, Function> = StringMapWrapper.create();
   private _eagerPropertySettersCache: StringMap<string, Function> = StringMapWrapper.create();
-  private _innerHTMLSetterCache: Function;
+  private _innerHTMLSetterCache: Function = (el, value) => DOM.setInnerHTML(el, value);
   private _attributeSettersCache: StringMap<string, Function> = StringMapWrapper.create();
   private _classSettersCache: StringMap<string, Function> = StringMapWrapper.create();
   private _styleSettersCache: StringMap<string, Function> = StringMapWrapper.create();
 
-  constructor() { this._innerHTMLSetterCache = (el, value) => DOM.setInnerHTML(el, value); }
-
   createSetter(protoElement: /*element*/ any, isNgComponent: boolean, property: string): Function {
     var setterFn, styleParts, styleSuffix;
     if (StringWrapper.startsWith(property, ATTRIBUTE_PREFIX)) {

modules/angular2/src/render/dom/view/proto_view.ts

@@ -13,11 +13,7 @@ export function resolveInternalDomProtoView(protoViewRef: RenderProtoViewRef) {
 }
 
 export class DomProtoViewRef extends RenderProtoViewRef {
-  _protoView: DomProtoView;
-  constructor(protoView: DomProtoView) {
-    super();
-    this._protoView = protoView;
-  }
+  constructor(public _protoView: DomProtoView) { super(); }
 }
 
 export class DomProtoView {

modules/angular2/src/render/dom/view/proto_view_builder.ts

@@ -146,39 +146,21 @@ export class ProtoViewBuilder {
 }
 
 export class ElementBinderBuilder {
-  element;
-  index: number;
-  parent: ElementBinderBuilder;
-  distanceToParent: number;
-  directives: List<DirectiveBuilder>;
-  nestedProtoView: ProtoViewBuilder;
-  propertyBindings: Map<string, ASTWithSource>;
-  variableBindings: Map<string, string>;
-  eventBindings: List<api.EventBinding>;
-  eventBuilder: EventBuilder;
-  textBindingIndices: List<number>;
-  textBindings: List<ASTWithSource>;
-  contentTagSelector: string;
-  readAttributes: Map<string, string>;
-  componentId: string;
+  parent: ElementBinderBuilder = null;
+  distanceToParent: number = 0;
+  directives: List<DirectiveBuilder> = [];
+  nestedProtoView: ProtoViewBuilder = null;
+  propertyBindings: Map<string, ASTWithSource> = MapWrapper.create();
+  variableBindings: Map<string, string> = MapWrapper.create();
+  eventBindings: List<api.EventBinding> = [];
+  eventBuilder: EventBuilder = new EventBuilder();
+  textBindingIndices: List<number> = [];
+  textBindings: List<ASTWithSource> = [];
+  contentTagSelector: string = null;
+  readAttributes: Map<string, string> = MapWrapper.create();
+  componentId: string = null;
 
-  constructor(index, element, description) {
-    this.element = element;
-    this.index = index;
-    this.parent = null;
-    this.distanceToParent = 0;
-    this.directives = [];
-    this.nestedProtoView = null;
-    this.propertyBindings = MapWrapper.create();
-    this.variableBindings = MapWrapper.create();
-    this.eventBindings = ListWrapper.create();
-    this.eventBuilder = new EventBuilder();
-    this.textBindings = [];
-    this.textBindingIndices = [];
-    this.contentTagSelector = null;
-    this.componentId = null;
-    this.readAttributes = MapWrapper.create();
-  }
+  constructor(public index: number, public element, description: string) {}
 
   setParent(parent: ElementBinderBuilder, distanceToParent): ElementBinderBuilder {
     this.parent = parent;
@@ -243,21 +225,13 @@ export class ElementBinderBuilder {
 }
 
 export class DirectiveBuilder {
-  directiveIndex: number;
-  propertyBindings: Map<string, ASTWithSource>;
-  hostPropertyBindings: Map<string, ASTWithSource>;
-  hostActions: List<HostAction>;
-  eventBindings: List<api.EventBinding>;
-  eventBuilder: EventBuilder;
+  propertyBindings: Map<string, ASTWithSource> = MapWrapper.create();
+  hostPropertyBindings: Map<string, ASTWithSource> = MapWrapper.create();
+  hostActions: List<HostAction> = [];
+  eventBindings: List<api.EventBinding> = [];
+  eventBuilder: EventBuilder = new EventBuilder();
 
-  constructor(directiveIndex) {
-    this.directiveIndex = directiveIndex;
-    this.propertyBindings = MapWrapper.create();
-    this.hostPropertyBindings = MapWrapper.create();
-    this.hostActions = ListWrapper.create();
-    this.eventBindings = ListWrapper.create();
-    this.eventBuilder = new EventBuilder();
-  }
+  constructor(public directiveIndex: number) {}
 
   bindProperty(name, expression) { MapWrapper.set(this.propertyBindings, name, expression); }
 
@@ -275,18 +249,12 @@ export class DirectiveBuilder {
 }
 
 export class EventBuilder extends AstTransformer {
-  locals: List<AST>;
-  localEvents: List<Event>;
-  globalEvents: List<Event>;
-  _implicitReceiver: AST;
+  locals: List<AST> = [];
+  localEvents: List<Event> = [];
+  globalEvents: List<Event> = [];
+  _implicitReceiver: AST = new ImplicitReceiver();
 
-  constructor() {
-    super();
-    this.locals = [];
-    this.localEvents = [];
-    this.globalEvents = [];
-    this._implicitReceiver = new ImplicitReceiver();
-  }
+  constructor() { super(); }
 
   add(name: string, source: ASTWithSource, target: string): api.EventBinding {
     // TODO(tbosch): reenable this when we are parsing element properties

modules/angular2/src/render/dom/view/view.ts

@@ -14,11 +14,7 @@ export function resolveInternalDomView(viewRef: RenderViewRef) {
 }
 
 export class DomViewRef extends RenderViewRef {
-  _view: DomView;
-  constructor(view: DomView) {
-    super();
-    this._view = view;
-  }
+  constructor(public _view: DomView) { super(); }
 }
 
 
@@ -28,20 +24,14 @@ const NG_BINDING_CLASS = 'ng-binding';
  * Const of making objects: http://jsperf.com/instantiate-size-of-object
  */
 export class DomView {
-  hostLightDom: LightDom;
-  shadowRoot;
-  hydrated: boolean;
-  eventDispatcher: EventDispatcher;
-  eventHandlerRemovers: List<Function>;
+  hostLightDom: LightDom = null;
+  shadowRoot = null;
+  hydrated: boolean = false;
+  eventDispatcher: EventDispatcher = null;
+  eventHandlerRemovers: List<Function> = [];
 
   constructor(public proto: DomProtoView, public rootNodes: List</*node*/ any>,
-              public boundTextNodes: List</*node*/ any>, public boundElements: List<DomElement>) {
-    this.hostLightDom = null;
-    this.hydrated = false;
-    this.eventHandlerRemovers = [];
-    this.eventDispatcher = null;
-    this.shadowRoot = null;
-  }
+              public boundTextNodes: List</*node*/ any>, public boundElements: List<DomElement>) {}
 
   getDirectParentElement(boundElementIndex: number): DomElement {
     var binder = this.proto.elementBinders[boundElementIndex];

modules/angular2/src/render/dom/view/view_container.ts

@@ -3,12 +3,8 @@ import {ListWrapper, MapWrapper, List} from 'angular2/src/facade/collection';
 import * as viewModule from './view';
 
 export class DomViewContainer {
-  views: List<viewModule.DomView>;
-
-  constructor() {
-    // The order in this list matches the DOM order.
-    this.views = [];
-  }
+  // The order in this list matches the DOM order.
+  views: List<viewModule.DomView> = [];
 
   contentTagContainers() { return this.views; }