Angular Signals

Angular Signals are a new feature that will be added to Angular in the upcoming months. I have been following discussions on Github and various blogs, and I've gained valuable insights into what Signals are and why they matter.

In simple terms, Signals are a primitive data type that represent a value that can change over time. When a Signal's value changes, it updates all the other values and templates that use that Signal. This allows for fine-grained reactivity in Angular and can significantly improve performance.

You may wonder why Signals are necessary since Angular already provides property binding. However, the current change detection in Angular works by checking for changes and then checking the entire Component tree, which causes performance issues and bugs. Signals will enable Angular to update only the parts of a Component in the Component tree that use that Signal, rather than checking and updating the entire Component tree.

It's important to note that Signals will be optional, and developers will be able to make a Component use Signals by updating its @Component decorator.

In conclusion, Signals in Angular will enable a better approach to change detection and improve the performance of Angular applications.