A brief overview of the features
Signals
Signals are a new way of managing state changes in Angular applications, inspired by Solid.js. Signals are functions that return a value (get())and can be updated by calling them with a new value (set()). Signals can also depend on other signals, creating a reactive value graph that automatically updates when any dependencies change. Signals can be used with RxJS observables, which are still supported in Angular v16, to create powerful and declarative data flows.
Reactivity Model and Zone.js (Zoneless)
One of the most anticipated features of Angular v16 is the revisiting of the reactivity model and making Zone.js optional to improve runtime performance. Zone.js is a library that monkey-patches browser APIs to detect changes and trigger change detection in Angular applications. While this makes Angular easy to use and write, it also adds some overhead and complexity to the framework. In Angular v16, Zone.js will be optional, meaning developers can opt out of it and use other ways of managing reactivity, such as RxJS or signals.
One of the features that will improve the developer experience and code quality of Angular applications is the required component inputs feature. This feature will allow developers to mark some inputs of a component as required, meaning the parent component must provide them, or else an error will be thrown. This will help catch bugs and typos at compile time and ensure that components receive all the necessary data to function properly. Required component inputs will also make components more self-documenting and easier to use.
Non-Destructive Hydration
Hydration in web development refers to the process of converting server-side rendered HTML content into a fully interactive and functional web page on the client-side by attaching JavaScript behavior and event listeners. This reduces the time-to-interactive (TTI) and improves SEO and accessibility. Hydration has been available in frameworks like React or Next.js for a while, but it was not easy to implement in Angular. In Angular 16, hydration will be supported out of the box, making SSR applications faster and smoother.
Other Features and Improvements 🚀
- Bind Router information to component inputs — PR
- DestroyRef as injectable provider — DestroyRef ctx is a new feature in Angular 16 that allows you to access the destroy context of a component. This can be useful for cleanup tasks that must be performed when a component is destroyed.
- takeUntilDestroyed() pipe — in Angular 16, there will be a new pipe operator called takeUntilDestroyed, which will automatically unsubscribe from an observable when a component or directive is destroyed
- Design tokens in Angular Material Library
Overall, I’m excited about Angular v16. It looks like it will be a great release with many new features and improvements. Stay tuned for more updates, and happy coding!
Reference – Google
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