For a recent application, I want to provide the ability to subscribe to a calendar feed while staying on the android device. Going to calendar.google.com and manually adding the http link (ics) isn...

I listen to 2 forms via 2 [formControl] "toppings":array and "toppings2":array. I must have the 2 values of the forms in the same time. So i combine my two observables with "CombineLatest" My cod...

When I run the linter it says: subscribe is deprecated: Use an observer instead of an error callback Code from this angular app: this.userService.updateUser(data).pipe( tap(() => {bla bla bla...

My site allows users to subscribe to MailChimp lists using the API via Drupal MailChimp module. But if a user unsubscribes by following the link in the email, and subsequently decides to re-subscri...

I want to wait for one function to finish before executing the function next to it. I have one function called getData() in which http call occurs which returns an observable. The second function c...

I have seen three ways to "listen" for changes to a value via an observable / call APIs to fetch data from the backend. One of these ways has "next:" : this.MySubscription = thi...

I feel like this scenario should be in the Angular 2 docs, but I can't find it anywhere. Here's the scenario submit a form (create object) that is invalid on the server server returns a 400 bad...

What's the way to simplify something like the following code example? I can't find the right operator.. could anyone give a short example? this.returnsObservable1(...) .subscribe( success => ...

I am very new to rxjs and was just wondering is it ok to setup a class property by piping the stream and tapping it, or it should i do it in the subscribe. To me either way works, just wonder if it...

I'm using a shareDataService using BehaviorSubject like below. My problem is that every time I call the service's next() method the listener subscription in any other component is called several ti...

I hope everyone just doing fine. Can, please someone clearly explains which one to choose among pipe and subscribe, and why? when it comes to not only getting the response but also to initialize so...

I want to achieve that if i call the Obervable.subscribe(Action1) method, it does not throw OnErrorNotImplementedException anywhere, but if i call Obervable.subscribe(Action1, Action1), the second ...

I want to use observable to be able to run my code synchronously, I want to return a true value after i get the icons from the server so that i can use it. How do i do it ? ngOnInit() { this.addI...

This question is very common, some prefer to use in service some in component: Angular 2 subscribe from component or service?: it says never do the manual subscription means from component! If we...

is there something like q.all to resolve all http api requests in angular2? In angular1, I can do something like this: var promises = [api.getA(),api.getB()]; $q.all(promises).then(function(respo...

Newbie question. Can't find a previous answer. I want to build a simple pump controller with Alexa. Would like Alexa to report pump state. Simplest approach is Alexa -> lambda -> publish_to_Iot. ...

I'm trying to test my front-end code without the back-end api using observables. In my component's template I have a textarea. Ultimately I need to send the textarea content to back-end api using h...

I am working on a search functionality for my project. Once the user types anything on the search bar; on any change in search text I'll be sending the text to backend for validation and receive a ...

Problem I subscribe to an httpClient.get observable twice. However, this means that my call gets executed twice. Why is this? Proof For every subscribe() I do, I get another line in the login page...

I need to call a method after get the data from the http post request service: request.service.TS get_categories(number){ this.http.post( url, body, {headers: headers, withCredentials:true}) ....

I'm banging my head against the wall with observables. Almost all of the documentation I can find is in the older rxjs syntax. I have an API call which is an observable. I'm calling it elsewhere ...

I'm getting the following error while trying to subscribe in the second time to an EventEmitter after that ngOnDestroy was invoked and called unsubscribe: ngOnInit() { this.route.params.subscri...

I'm using an auth guard in angular 5 to check if the user should be able to navigate to a specific page. I am getting an error related to returning an observable: A function whose declared type is...

I want to return a boolean value ,but the variable in the "if" condition is undefined. function() { this.menuDataService.getMenu() .subscribe(res => { this.mainMenus = res.MainMenus; conso...

I am trying to subscribe to channel using native WebSocket in vanilla javascript (without using any library) [as I have just read it's possible but I am not sure - please correct me if I'm wrong]. ...