@hellajs/core

A reactive system that updates automatically when data changes. Uses a reactive dependency graph with efficient propagation and topological execution order.

The core package is a heavily modified fork of the excellent Alien Signals library.

Documentation

• API Reference
• Reactive Concepts

Quick Start

Installation

npm install @hellajs/core

Basic Usage

import { signal, computed, effect } from '@hellajs/core';

// Create reactive state
const count = signal(0);
const multiplier = signal(2);

// Derive values automatically
const doubled = computed(() => count() * multiplier());

// Handle side effects with automatic cleanup
const cleanup = effect(() => {
  console.log(`Count: ${count()}, Doubled: ${doubled()}`);
});

// Logs: "Count: 5, Doubled: 10"
count(5);

// Stop the effect
cleanup();

License

This software is provided "as is" under the MIT License, without any warranties. The authors are not liable for any damages arising from its use.