angular-cn/modules/angular2/docs/cheatsheet/directive-and-component-decorators.md

@cheatsheetSection Class field decorators for directives and components @cheatsheetIndex 7 @description import {Input, ...} from 'angular2/angular2';

@cheatsheetItem @Input() myProperty;|@Input() Declares an input property that we can update via property binding, e.g. <my-cmp [my-property]="someExpression">

@cheatsheetItem @Output() myEvent = new EventEmitter();|@Output() Declares an output property that fires events to which we can subscribe with an event binding, e.g. <my-cmp (my-event)="doSomething()">

@cheatsheetItem @HostBinding('[class.valid]') isValid;|@HostBinding('[class.valid]') Binds a host element property (e.g. css class valid) to directive/component property (e.g. isValid)

@cheatsheetItem @HostListener('click', ['$event']) onClick(e) {...}|@HostListener('click', ['$event']) Subscribes to a host element event (e.g. click) with a directive/component method (e.g., onClick), optionally passing an argument ($event)

@cheatsheetItem @ContentChild(myPredicate) myChildComponent;|@ContentChild(myPredicate) Binds the first result of the component content query (myPredicate) to the myChildComponent property of the class.

@cheatsheetItem @ContentChildren(myPredicate) myChildComponents;|@ContentChildren(myPredicate) Binds the results of the component content query (myPredicate) to the myChildComponents property of the class.

@cheatsheetItem @ViewChild(myPredicate) myChildComponent;|@ViewChild(myPredicate) Binds the first result of the component view query (myPredicate) to the myChildComponent property of the class. Not available for directives.

@cheatsheetItem @ViewChildren(myPredicate) myChildComponents;|@ViewChildren(myPredicate) Binds the results of the component view query (myPredicate) to the myChildComponents property of the class. Not available for directives.