Angular Effects

Angular linkedSignal(): Advanced Features and Multiple Sources (v19+)

November 29, 2024

Angular's linkedSignal() goes beyond simple two-way binding with advanced features that enable intelligent update logic. By comparing old and new values, you can create conditional updates, prevent unnecessary changes, and implement complex state synchronization patterns. This tutorial explores advanced linkedSignal() features including value comparison callbacks, multiple source signals, and smart update strategies that optimize performance and reduce unnecessary re-renders.

Angular Angular Effects Angular Forms

Angular linkedSignal(): Create Writable Signals from Other Signals (v19+)

November 15, 2024

Angular 19 introduces linkedSignal(), a powerful new primitive for creating writable signals that automatically sync with other signals. Unlike computed signals which are read-only, or effects which cause side effects, linked signals provide a clean way to create two-way reactive bindings. This tutorial demonstrates how to use linkedSignal() to simplify form state management, create reactive UI components, and avoid common anti-patterns with effects.

Angular Angular Components Angular Effects

Angular effect(): When NOT to Use It and Better Alternatives

November 01, 2024

Angular's effect() function is often misused, leading to performance issues, unnecessary side effects, and code that's harder to reason about. While effects seem like an easy solution for reacting to signal changes, most scenarios have better alternatives using computed signals, template bindings, or lifecycle hooks. This tutorial shows you when NOT to use effects, demonstrates common anti-patterns, and provides better solutions for each scenario. You'll learn to write more efficient, maintainable Angular code.

Angular Angular Components Angular Effects

Angular Signal Inputs: Replace @Input and ngOnChanges (v19+)

October 25, 2024

Enabling and disabling form controls based on input changes requires ngOnChanges() lifecycle hooks and manual state management when using traditional @Input decorators. Signal inputs eliminate this complexity by providing reactive values that automatically trigger updates, making form state management simpler and more declarative. This tutorial demonstrates how to migrate from @Input and ngOnChanges() to signal inputs, showing how reactive forms integrate seamlessly with Angular's signal system.

Angular Angular Effects Angular Signals

Angular effect(): React to Signal Changes with Side Effects (v19+)

August 01, 2024

Reacting to signal changes for side effects like logging, API calls, or DOM manipulation requires a different approach than computed signals, which are read-only and template-focused. Angular's effect() function executes code when signals change, making it perfect for debugging, analytics, and imperative operations that can't be handled in templates. This tutorial demonstrates when and how to use effect() effectively, while also covering when NOT to use it (see the linked tutorial for common mistakes).