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Inside Fiber: in-depth overview of the new reconciliation algorithm in React React is a JavaScript library for building user interfaces. At its core lies the mechanism that tracks changes in a component state and projects the updated state to the screen. In React we know this process as reconciliation. We call the setState method and the framework checks if the state or props have changed and re-r

Ivy engine in Angular: first in-depth look at compilation, runtime and change detection I usually finish my talks with the philosophical phrase that nothing stays the same. And as you probably know it’s more then true with Angular. The current rendering engine is being rewritten with the new much enhanced version called Ivy. The current status of Ivy can be tracked here. Today, we’re going to take

Never again be confused when implementing ControlValueAccessor in Angular forms If you’re working on a complex project inevitably you will face the situation when you have to create a custom form control. The essential component of this task will be implementing ControlValueAccessor. There are some articles on the web that explain how to implement it but none provides an insight into what role thi

Angular 19 – what’s new?Welcome to Angular 19! This latest release brings a wealth of new features and enhancements designed to streamline development and improve performance. From innovative reactive primitives like linkedSignal and … Cracking Angular DI: The Hidden Layers of InjectorsDependency Injection (DI) is a useful and popular tool that makes development easier. It simplifies the process o

Everything you need to know about the `ExpressionChangedAfterItHasBeenCheckedError` error This article is relevant for the rendering ViewEngine, that was used before Ivy in Angular versions before 10. Some of the explanation may not work as described in recent versions of Angular that use Ivy. It seems that recently almost every day there’s a question on stackoverflow regarding the ExpressionChang