interfaces.md

Angular Interfaces

Interfaces are optional, yet it's good practice to add interfaces to TypeScript directive classes in order to benefit from strong typing and editor tooling.

import { Component, SimpleChange, OnInit, OnChanges } from '@angular/core';

@Component({
	...
})
export class SomeComponent implements OnInit, OnChanges {
	ngOnInit() {...}

	ngOnChanges(changes: {[property: string]: SimpleChange}) {...}
}

Hook Interfaces and Their Methods

Interface	Methods
AfterContentChecked	ngAfterContentChecked()
AfterContentInit	ngAfterContentInit()
AfterViewChecked	ngAfterViewChecked()
AfterViewInit	ngAfterViewInit()
DoBootstrap	ngDoBootstrap(appRef: ApplicationRef)
DoCheck	ngDoCheck()
OnChanges	ngOnChanges(changes: SimpleChanges)
OnDestroy	ngOnDestroy
OnInit	ngOnInit()

Other Interfaces

PipeTransform

import { Pipe, PipeTransform } from '@angular/core';

@Pipe({
	name: 'year'
})
export class YearPipe implements PipeTransform {
	transform(date: string): number {
		var {groups: {year}} = date.match(/^\d{2}\.\d{2}\.(?<year>\d{4})$/);
		return parseInt(year);
	}
}

Full List

https://angular.io/api?query=core&type=interface