Computed Signals

Introduction

Computed signals derive values from other signals. They automatically recalculate when dependencies change.

Example

const firstName = signal('John');
const lastName = signal('Doe');

const fullName = computed(() => `${firstName()} ${lastName()}`);
console.log(fullName()); // 'John Doe'

firstName.set('Jane');
console.log(fullName()); // 'Jane Doe' (auto-updated!)

Summary

Computed signals provide automatic derived state with lazy evaluation.”