What Are Signals
Understand signals as reactive state containers.
What Are Signals?
A signal is a reactive primitive introduced in modern Angular. It is a wrapper around a value that can notify interested consumers when that value changes.
Signals make Angular reactivity explicit, granular, and easy to reason about.
Why Reactivity Matters
In a UI framework, the screen must stay in sync with your data. When data changes, the view should update.
Signals give Angular a precise way to know exactly what changed and what depends on it, so only the affected parts of the view are refreshed.