fromEvent, interval, merge, Subject } from 'rxjs' ; import { debounceTime, filter, map, repeat, startWith, switchMap, take, takeUntil } from 'rxjs/operators' ; import { HttpClient } from '@angular/common/http' ; interface User { address: string ; balance: number ; created: string ; email: string ; first: string ; last: string ; } @Component( { selector: 'app-root' , template: ` <button (click)="click$.next()">Refresh</button > <input id="auto" type="checkbox" ngModel (ngModelChange)="change$.next($event)" / > <label for="auto">Enable Auto Refresh</label > <section *ngFor="let user of view$ | async" > <hr > <div>Name: {{ user.first }} {{ user.last }}</div > <div>Address: {{ user.address }}</div > <div>Balance: {{ user.balance }}</div > <div>Email: {{ user.email }}</div > </section > ` } ) export class AppComponent { click$ = new Subject<void>() ; change$ = new Subject<boolean>() ; touchstart$ = fromEvent<TouchEvent>(document, 'touchstart') ; touchend$ = fromEvent<TouchEvent>(document, 'touchend') ; touchmove$ = fromEvent<TouchEvent>(document, 'touchmove') ; interval$ = interval(5000) ; fetch$ = this.httpClient.get<User[]>('https://randomapi.azurewebsites.net/api/users') ; clickRefresh$ = this.click$.pipe(debounceTime(300)) ; touchRefresh$ = this.touchstart$.pipe ( switchMap(touchstart = > this.touchmove$.pipe ( map(touchmove => touchmove.touches[0].pageY - touchstart.touches[0].pageY) , takeUntil(this.touchend$ ) ) ) , filter(position => position >= 300) , take(1) , repeat( ) ) ; autoRefresh$ = this.change$.pipe(switchMap(enabled => (enabled ? this.interval$ : EMPTY))) ; refresh$ = merge(this.clickRefresh$, this.autoRefresh$, this.touchRefresh$).pipe(startWith(true)) ; view$ = this.refresh$.pipe(switchMap(() => this.fetch$)) ; constructor(private httpClient: HttpClient) { } } https://github.com/vthinkxie/ng-pull-refresh
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