Added the BindablePropertyConfig interface

 * describes the configuration object that can be passed to customize
the bindable decorator and the BindableProperty class

 * used the interface type appropriate

 * fixed a few minor typos (spelling)

 * built and ran tests (+1 squashed commits)

src/bindable-property.js

@@ -33,9 +33,9 @@ function getObserver(instance, name) {
 export class BindableProperty {
   /**
   * Creates an instance of BindableProperty.
-  * @param nameOrConfig The name of the property or a cofiguration object.
+  * @param nameOrConfig The name of the property or a configuration object.
   */
-  constructor(nameOrConfig: string | Object) {
+  constructor(nameOrConfig: string | BindablePropertyConfig) {
     if (typeof nameOrConfig === 'string') {
       this.name = nameOrConfig;
     } else {
@@ -219,11 +219,11 @@ export class BindableProperty {
     }
 
     observer = observerLookup[name] = new BehaviorPropertyObserver(
-        this.owner.taskQueue,
-        viewModel,
-        name,
-        selfSubscriber
-        );
+      this.owner.taskQueue,
+      viewModel,
+      name,
+      selfSubscriber
+    );
 
     Object.defineProperty(viewModel, name, {
       configurable: true,

src/decorators.js

@@ -58,7 +58,7 @@ export function customElement(name: string): any {
 * @param defaultBindingMode The default binding mode to use when the attribute is bound with .bind.
 * @param aliases The array of aliases to associate to the custom attribute.
 */
-export function customAttribute(name: string, defaultBindingMode?: number, aliases?: string[]): any {
+export function customAttribute(name: string, defaultBindingMode?: bindingMode, aliases?: string[]): any {
   return function(target) {
     let r = metadata.getOrCreateOwn(metadata.resource, HtmlBehaviorResource, target);
     r.attributeName = validateBehaviorName(name, 'custom attribute');
@@ -85,7 +85,7 @@ export function templateController(target?): any {
 * Decorator: Specifies that a property is bindable through HTML.
 * @param nameOrConfigOrTarget The name of the property, or a configuration object.
 */
-export function bindable(nameOrConfigOrTarget?: string | Object, key?, descriptor?): any {
+export function bindable(nameOrConfigOrTarget?: string | BindablePropertyConfig, key?, descriptor?): any {
   let deco = function(target, key2, descriptor2) {
     let actualTarget = key2 ? target.constructor : target; //is it on a property or a class?
     let r = metadata.getOrCreateOwn(metadata.resource, HtmlBehaviorResource, actualTarget);
@@ -224,14 +224,14 @@ export function useView(path: string): any {
 * @param dependencies A list of dependencies that the template has.
 * @param dependencyBaseUrl A base url from which the dependencies will be loaded.
 */
-export function inlineView(markup:string, dependencies?:Array<string|Function|Object>, dependencyBaseUrl?:string): any {
+export function inlineView(markup: string, dependencies?: Array<string | Function | Object>, dependencyBaseUrl?: string): any {
   return useViewStrategy(new InlineViewStrategy(markup, dependencies, dependencyBaseUrl));
 }
 
 /**
 * Decorator: Indicates that the component has no view.
 */
-export function noView(targetOrDependencies?:Function|Array<any>, dependencyBaseUrl?:string): any {
+export function noView(targetOrDependencies?: Function | Array<any>, dependencyBaseUrl?: string): any {
   let target;
   let dependencies;
   if (typeof targetOrDependencies === 'function') {

src/interfaces.js

@@ -1,3 +1,4 @@
+import {bindingMode} from 'aurelia-binding';
 import {View} from './view';
 import {ViewStrategy} from './view-strategy';
 
@@ -67,3 +68,21 @@ interface DynamicComponentGetViewStrategy {
     */
     getViewStrategy(): string|ViewStrategy;
 }
+
+/**
+* An optional interface describing the configuration object that can be specified to customize bindable properties.
+*/
+interface BindablePropertyConfig {
+  /**
+  * The default binding mode of the property.
+  */
+  defaultBindingMode?: bindingMode;
+  /**
+  * The name of a view model method to invoke when the property is updated.
+  */
+  changeHandler?: string;
+  /**
+   * The name of the property.
+  */
+  name?: string;
+}