Introduction to Angular Signal | How Will Signal Help with Change Detection?

Angular Signals, an integral part of the Angular ecosystem and closely tied to Angular's change detection mechanism, is a sophisticated system that meticulously monitors the utilization and distribution of your application's state. This unique feature, often referred to as 'signal in Angular', empowers the framework to fine-tune rendering updates, a crucial aspect of Angular 16.
Essentially, an Angular signal serves as an envelope for a value, capable of alerting keen consumers about any changes to that value. This plays a pivotal role in Angular's change detection strategy, as it allows the framework to identify when a value has changed and the view needs to be updated. The versatility of signals in Angular is evident in their ability to hold any value, ranging from basic primitives to intricate data structures.
Accessing a signal's value in Angular 16 is always done via a getter function, a process that enables Angular to keep tabs on the signal's usage. This is a key feature of 'signal Angular 16' and is integral to the efficient operation of Angular's change detection mechanism.
Depending on their configuration, Angular signals can be either writable or exclusively read-only. This unique feature of 'signal Angular' enhances the flexibility and control in managing application states, making it a powerful tool for developers and a cornerstone of Angular's change detection strategy.
#signal #angular #webdevelopment
00:00 - Welcome and Introduction
00:43 - Understanding Signals in Angular
01:36 - The Advantages of Angular Signals
02:53 - Practical Signal Implementation Example
06:15 - Mastering Change Detection with Signals
07:30 - Exploring Angular's Default Change Detection
08:29 - Optimizing Change Detection with onPush Strategy
10:04 - The Exciting Future of Zone-less Angular Change Detection
12:09 - Distinguishing Signals from Observables
13:33 - Knowing When to Choose Signals or Observables in Your Projects
Some more playlists:
Create PWAs: bit.ly/359BXpK
NgRx: bit.ly/2Qu0Ucu
Performance optimization: bit.ly/3fFa1Q8
RxJs: bit.ly/3hytr8o
Angular Tutorial: bit.ly/2Tnwk1t
Dashboard with chart.js: bit.ly/3c9Jd85
Application Development: bit.ly/398w7Gf
Upload File to server: bit.ly/3ccsjWd
Data Structure and algo: bit.ly/3c8b7Bh
Discord: / discord
Slack: bit.ly/2RXPcEK
You can support me on Patreon: / funofheuristic
Equipment used for Video (India links):
Headphone (ATH M50X): amzn.to/3xDcSQK
Microphone (AKG D5): amzn.to/3b1gi5R
Audio Interface (EVO 4): amzn.to/327tnGJ
Camera(Canon 200D): amzn.to/3ja1Pr9
Thanks for watching...

[@vamshikunuguntla7626]

Nice!!, Please do more videos on signals.

[@sergeyhoishyk6948]

Hi, could you explain how change detection works in the default strategy with signals in version 16? Additionally, how will it operate in version 17 with the default strategy? I understand that in version 16, signals with the 'OnPush' strategy check the component tree, but not all components, and in the next version, 17, we only check the component if we're using the 'OnPush' signal. However, I'm a little confused about how it functions in the default strategy

[@RAHULROY-sb9nt]

How current signals work in angular,what is the flow of change detection with signals now..does it checks from root?using zonejs??

[@FunOfHeuristic]

Yes it's still using zone js, we will have zone less angular in future

[@shivenigma]

From the video alone, signals doesn't seem to do anything else that behaviourSubject and observable with async pipe can't do. Not sure what's the benefit yet.

[@FunOfHeuristic]

If you are only thinking about displaying data on the screen, you will not find any difference. However, for complex scenarios like computing something or acting upon changes with any value, I know we have RxJs operators, but they come with the requirement to unsubscribe the observable, and as a result, the application becomes complex, and the learning curve increases. By using signals, all of this will be simplified. I will try to demonstrate some similar examples in the next video.

[@Walter_Birantana]

Im not far as any of you, just want to inquire why change detection strategy in angular v16 isnt working
Its being imported from @angular/complier
When i declare a change detection property in the decoratir above the class component, its returning an error
"changeDetection must be a memeber of the ChangeDetectionStrategy enum in the @angular/core "

[@FunOfHeuristic]

Have you declared your component with onPush strategy.

[@Walter_Birantana]

@@FunOfHeuristic yeah i did.
But I've fixed it
I had to import the changedectionstrategy from the @angular/core
Thank you btw for your content
I have only just started out with angular
And I would as I'm sure most new angular developers, appreciate it if you made a video of everything new in angular 16 in relation to previous versions
Thanks for the heads up on signals