2.1 KiB
@cheatsheetSection
Class field decorators for directives and components
@cheatsheetIndex 7
@description
{@target js ts}import {Input, ...} from 'angular2/angular2';{@endtarget}
{@target dart}import 'package:angular2/angular2.dart';{@endtarget}
@cheatsheetItem
syntax:
@Input() myProperty;|@Input()
description:
Declares an input property that we can update via property binding, e.g.
<my-cmp [my-property]="someExpression">
@cheatsheetItem
syntax:
@Output() myEvent = new EventEmitter();|@Output()
description:
Declares an output property that fires events to which we can subscribe with an event binding, e.g. <my-cmp (my-event)="doSomething()">
@cheatsheetItem
syntax:
@HostBinding('[class.valid]') isValid;|@HostBinding('[class.valid]')
description:
Binds a host element property (e.g. css class valid) to directive/component property (e.g. isValid)
@cheatsheetItem
syntax:
@HostListener('click', ['$event']) onClick(e) {...}|@HostListener('click', ['$event'])
description:
Subscribes to a host element event (e.g. click) with a directive/component method (e.g., onClick), optionally passing an argument ($event)
@cheatsheetItem
syntax:
@ContentChild(myPredicate) myChildComponent;|@ContentChild(myPredicate)
description:
Binds the first result of the component content query (myPredicate) to the myChildComponent property of the class.
@cheatsheetItem
syntax:
@ContentChildren(myPredicate) myChildComponents;|@ContentChildren(myPredicate)
description:
Binds the results of the component content query (myPredicate) to the myChildComponents property of the class.
@cheatsheetItem
syntax:
@ViewChild(myPredicate) myChildComponent;|@ViewChild(myPredicate)
description:
Binds the first result of the component view query (myPredicate) to the myChildComponent property of the class. Not available for directives.
@cheatsheetItem
syntax:
@ViewChildren(myPredicate) myChildComponents;|@ViewChildren(myPredicate)
description:
Binds the results of the component view query (myPredicate) to the myChildComponents property of the class. Not available for directives.