query is something you just query for once, you can consider it as an equivalent of GET. watchQuery is something you constantly keep a watch on query, whenever that query will be refetched or the data related to that query is changed from anywhere else, this method will keep on emitting the updated data. It’s … Read more
If you look at the source for Subject.complete, you’ll find the answer: complete() { if (this.closed) { throw new ObjectUnsubscribedError(); } this.isStopped = true; const { observers } = this; const len = observers.length; const copy = observers.slice(); for (let i = 0; i < len; i++) { copy[i].complete(); } this.observers.length = 0; } Calling … Read more
Probably a bit late, but you could leverage the help of rxjs-spy. This solution is equivalent the proposed one, and, in my opinion, better maintainable. I usually enable it globally in main.ts as a fire and forget strategy. You simply have to: install rxjs-spy via your package manager import in main.ts the reference to the … Read more
Well, I figured out the following: parse: { dateInput: ‘DD.MM.YYYY’, }, display: { dateInput: ‘DD.MM.YYYY’, monthYearLabel: ‘MMM YYYY’, dateA11yLabel: ‘LL’, monthYearA11yLabel: ‘MMMM-YYYY’, }, with parse.dateInput: you can let the user enter any type of date with any format, and the date adapter will reformat it to the format you specify in this attribute with display.dateInput … Read more
Edit: NgRx effects fire after all reducers for that action have executed. That order is guaranteed. The reduced state is the payload of your effects. Found the following comment in lifecycle_hooks.d.ts in the NgRx effects-build project: By default, effects are merged and subscribed to the store. Implement the OnRunEffects interface to control the lifecycle of … Read more
A call to subscribe returns an instance of Disposable, which has a method dispose. Or if you are using RxJS 5, dispose has been renamed to unsubscribe (thanks @EricMartinez). And from the RxJS docs: …when we’re no longer interested in receiving the data as it comes streaming in, we call dispose on our subscription. Store … Read more
I also ran into this because I always assign my FormGroup later and I was not happy about having to add a ton of boilerplate types on every FormGroup declaration. It felt like I was repeating myself, so what I ended up doing was creating a utility type which has been working well. export type … Read more
First way: paremeter One way to make a Pure Pipe becoming impure is add a parameter to your Pipe. when you want to refresh, just change the parameter. Second way: without parameter Pure Pipe will be fired when its input has a new instance. So with TypeScript 2.1+, the below code will copy the original … Read more
So I finally found a solution that I like. Following the answer in this post How to update view after change in angular2 after google event listener fired I updated myList within zone.run() and now my data is updated in my view like expected. MyService.ts /// <reference path=”../../../typings/tsd.d.ts” /> // Import import {NgZone} from ‘angular2/angular2’; … Read more
Static methods of a class, unlike instance methods, belong to (are visible on) the class itself (not an instance of it). They do not depend on the instance members of a class and will usually take input from the parameters, perform actions on it, and return some result. They act independently. They do make sense … Read more