Angular Signals in 10 minutes

Hi there,

Signals are the smallest idea in modern Angular, and the one everything else is built on.

A signal is a value that knows when it changes. That's it.

const counter = signal(0);

counter();        // read it
counter.set(5);   // write it
counter.update(c => c + 1);

The interesting part is what happens next. When a template reads a signal, Angular records that the template depends on it. When the signal changes, only the parts of the page that actually read it get updated — no tree-walking, no zone patching, no change detection strategy to configure.

This is why zoneless Angular works. The framework no longer has to guess what changed, because the values report it themselves.

👉 Creating Your First Writeable Signal — free lesson (6:42)

If you want the deep version, the complete guide covers every corner of the API, including the pitfalls that catch people out:

👉 Angular Signals: Complete Guide

Vasco
Angular University