The new linkedSignal primitive in Angular 19 is a pretty handy new feature. In a previous tutorial we looked at the basics, but in this tutorial, we’ll take it a little further and look at a more advanced feature where we will compare the new and old values of the source signal to provide “smart” signal updates. Ok, let’s get started.
Angular 19 is here and that means that it’s time to learn some new stuff. In this tutorial, we’re getting hands-on with Angular’s latest signal feature, the linkedSignal() function. It’s a powerful way to create signals that are both writable, and that automatically update based on changes in other signals without improperly using the effect() function. Let’s dive right in and see how this new function can streamline reactive updates in your Angular Apps!
Effects in Angular are pretty new but have definitely stirred up some controversy in their short time as part of the framework. Basically as far as I understand it, the main goal with the effect function is to handle things related to signals, that you really have no way to do otherwise. And as the Angular docs point out, “effects are rarely needed in most application code”. But there are some totally valid use cases.
Hey there, Angular folks, and welcome back! If you're still using @Input decorators and ngOnChanges() for managing states, this tutorial is for you! We’ll take two simple forms that are enabled and disabled programmatically based on an @Input and refactor them to use Angular’s latest signal-based approach.
Signals are a pretty big deal in Angular now a days. I’ve created several videos on them recently because there’s a lot to consider when using them. As you use them more over time, you’ll probably run into scenarios where you need to execute code when signal values change. Now, one way to do this is to use computed signals which is something I’ve covered in the past, but there is a possibility that even this won’t work for your situation. We’ll if this is the case, there is another possibility. You can use the effect function.