Fixing Expression Has Changed After It Was Checked Error in Angular

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Learn how to fix expression has changed after it was checked error which is one of the most popular errors in Angular and it is quite tricky to fix.
TIMESTAMPS
0:00 Introduction
2:54 Ways to fix
5:47 One more example
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Опубликовано:

21 июл 2024

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Комментарии : 21

@MonsterlessonsAcademy 2 месяца назад

WATCH NEXT: Reactive Form Validation in Angular - Do It Right - ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-mOYAB1uMyhQ.htmlsi=ux38EreCwwUTcbc0

@jurybalikov7063 2 месяца назад

As always, happy to see new videos. This will be a helpful video to anyone trying to fix this error, but I was expecting you to mention in the end of the video that all of these fixes are, well, fixes. And in reality, if you are running into this error, you are likely writing some anti-pattern code and should refactor it. Most likely, get rid of, as you called it, "nasty mutations" and side effects.

@MonsterlessonsAcademy 2 месяца назад

I agree, good architecture is important, but typically people just stumble across this error and don't understand at all what is the problem. Refactoring would be the next step.

@sachin.tandon 2 месяца назад

Great videos, I love them. Your explanations are so clear...even for a Cambridge / M.I.T. Engineer. For the above problem, there is a 4th way. I used to get it a lot and used the cdr and set Timeout solutions. Using signals / computed signals, viewChild, etc, overcomes the problem entirely.

@MonsterlessonsAcademy 2 месяца назад

Yeap. Everything will boil down to signals.

@deadlyecho 2 месяца назад

You can also use ngzone run... but for this video, its better to refactor the code... I would say this video is just for learning purposes...

@MonsterlessonsAcademy 2 месяца назад

Yeap

@kayodesamsonadelola7688 2 месяца назад

Thank you for this 😊

@MonsterlessonsAcademy 2 месяца назад

You're welcome 😊

@akuoko_konadu 2 месяца назад

Thanks, for the video, I don't do manual change detection, mostly because I can forget to rerun CD, so I just stick with delay and setTimeout. I don't know but is there a way signals will fix this issue, cause I have heard that signals does not depend on angular change detection

@MonsterlessonsAcademy 2 месяца назад

They will. The future is that we don't need the whole traversing of components to make a component change detection and signals are going in that way.