Subject does not contain the property debounceTime in the Angular 6 upgrade

Question

Subject does not contain the property debounceTime in the Angular 6 upgrade

I just tried to update my Angular 5 app to version 6 by following the guidelines on https://update.angular.io/. I believe I followed all the steps correctly.

Here's the error message I encountered:

Property 'debounceTime' does not exist on type 'Subject<string>'.

In addition, the debounceTime import was missing from my components after the update process. It seems like ng update might have removed it.

angular typescript rxjs

Answer 1

Answer №1

Thanks to the assistance of both @Siva636 and @Andrew Lobban, I was able to successfully solve this problem.

The solution involved using a pipe operator:

this.field$.pipe(
        debounceTime(400),
        distinctUntilChanged())

Answer 2

Thanks to the assistance of both @Siva636 and @Andrew Lobban, I was able to successfully solve this problem.

The solution involved using a pipe operator:

this.field$.pipe(
        debounceTime(400),
        distinctUntilChanged())

Answer 3

Answer №2

If you're working with Angular 6.1.8, all you have to do is import and add a pipe as shown in the example below:

import {debounceTime} from 'rxjs/operators';

After that, just before calling the observable subscribe method on a field, use pipe(debounceTime(1000)) like this:

emailControl.valueChanges.pipe(debounceTime(1000)).subscribe(value => this.setMessage(emailControl));

That's all there is to it. This is an updated response based on @tiago's answer - where she defines const debouncetime - but using const and pipe isn't necessary.

Answer 4

If you're working with Angular 6.1.8, all you have to do is import and add a pipe as shown in the example below:

import {debounceTime} from 'rxjs/operators';

After that, just before calling the observable subscribe method on a field, use pipe(debounceTime(1000)) like this:

emailControl.valueChanges.pipe(debounceTime(1000)).subscribe(value => this.setMessage(emailControl));

That's all there is to it. This is an updated response based on @tiago's answer - where she defines const debouncetime - but using const and pipe isn't necessary.

Answer 5

Answer №3

When following the documentation for reactivex, it is important to also remember to subscribe to the pipe observable:

.pipe(
    debounceTime(500),
    distinctUntilChanged(),
    map((val) => {
        ...
    })
)
.subscribe();

It's worth noting that an Observable is considered a "cold" Observable if it does not start emitting items until an observer has been subscribed to it.

Answer 6

When following the documentation for reactivex, it is important to also remember to subscribe to the pipe observable:

.pipe(
    debounceTime(500),
    distinctUntilChanged(),
    map((val) => {
        ...
    })
)
.subscribe();

It's worth noting that an Observable is considered a "cold" Observable if it does not start emitting items until an observer has been subscribed to it.

Answer 7

Answer №4

I apologize for the delay in responding, but I only encountered this issue today and managed to resolve it quickly. To address the problem, I followed these steps: Firstly, I imported the necessary functions as follows:

import {debounceTime} from 'rxjs/operators';
import {pipe} from 'rxjs'

Next, I created a constant using the pipe method (initially attempted without duplicating pipe, but had to resort to this workaround):

const debouncetime = pipe(debounceTime(1000));

Finally, I used it before subscribing to an observable. For example, when implementing an email validator with custom messages:

const emailControl = this.registerForm.get('email');
    emailControl.valueChanges
     .pipe(debouncetime)
     .subscribe(value => this.setEmailMessage(emailControl))

While perhaps not the optimal solution, it proved effective in my case. Hopefully, this explanation can benefit others facing a similar issue!

Answer 8

I apologize for the delay in responding, but I only encountered this issue today and managed to resolve it quickly. To address the problem, I followed these steps: Firstly, I imported the necessary functions as follows:

import {debounceTime} from 'rxjs/operators';
import {pipe} from 'rxjs'

Next, I created a constant using the pipe method (initially attempted without duplicating pipe, but had to resort to this workaround):

const debouncetime = pipe(debounceTime(1000));

Finally, I used it before subscribing to an observable. For example, when implementing an email validator with custom messages:

const emailControl = this.registerForm.get('email');
    emailControl.valueChanges
     .pipe(debouncetime)
     .subscribe(value => this.setEmailMessage(emailControl))

While perhaps not the optimal solution, it proved effective in my case. Hopefully, this explanation can benefit others facing a similar issue!

Subject does not contain the property debounceTime in the Angular 6 upgrade

Answer №1

Answer №2

Answer №3

Answer №4

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