Angular ‐ Signals

What are Signals?

• Signals are a new feature that tracks changes in a variable’s value and notifies us reactively when a change occurs.
• Signals provide a new way to capture when a variable undergoes a data change, making the code more reactive

• A signal is a variable + change notification
• A signal is reactive, and is called a "reactive primitive"
• A signal always has a value
• A signal is synchronous
• A signal is not a replacement for RxJS and Observables for asynchronous operations, such as http.get

Where can we use signals?

• Use them in components to track local component state
• Use them in directives
• Use them in a service to share state across components
• Read them in a template to display signal values
• Or use them anywhere else in your code

References

• https://www.freecodecamp.org/news/angular-signals/
• https://medium.com/@atakankorez/angular-signals-in-every-aspect-20875d9cac27#:~:text=Signals%20provide%20a%20powerful%20and,responsive%20and%20performant%20Angular%20components.