rxjs

问题 Use case: Call a function every minute (60000 ms) that dispatches store action to fetch lastUpdated status of items, which upon response and filtering, updates the store, and updated store is read as an observable and displayed in the view). This needs to happen for as long as the web app is open (so indefinitely). Currently, I'm using this: this.refreshDate = window.setInterval( () => this.store.dispatch(new FetchLastUpdate()) , 60000); And when view is destroyed/dismounted, I delete the

问题 What's the preferred way to create an observable from a button's onclick event using Angular 2? I'm not sure if it's considered best practice to grab the native element from the DOM in the component code (how do I do this?), or if there's some other shortcut I don't know about. 回答1: You can use Observable.fromEvent like explained in Angular2 RxJS getting 'Observable_1.Observable.fromEvent is not a function' error Or just forward to an observable like private obs = new Subject(); public obs$ =

问题 I read the documentation of switchMap and map, but I still don't completely understand the difference. Are there some cases where it does not make a difference at all? 回答1: Both operators are different. switchMap : Maps values to observable. Cancels the previous inner observable. Eg: fromEvent(document, 'click') .pipe( // restart counter on every click // First click: 0, 1, 2... // Second click: cancels the previous interval and starts new one. 0, 1, 2... switchMap(() => interval(1000)) )

来源： https://stackoverflow.com/questions/63685936/avoiding-nesting-subscriptions-in-angular-2

来源： https://stackoverflow.com/questions/45733513/ngx-translate-with-angular-material-2-mdsnackbar

来源： https://stackoverflow.com/questions/45733513/ngx-translate-with-angular-material-2-mdsnackbar

来源： https://stackoverflow.com/questions/45733513/ngx-translate-with-angular-material-2-mdsnackbar

来源： https://stackoverflow.com/questions/64500500/combining-multiple-conditional-observables-for-preparing-the-data

来源： https://stackoverflow.com/questions/64500500/combining-multiple-conditional-observables-for-preparing-the-data

来源： https://stackoverflow.com/questions/64500500/combining-multiple-conditional-observables-for-preparing-the-data