Beacon A stylized lighthouse beacon with golden light against a dark blue background, representing the reactive state library
Reactive dependency graph runtime for Node.js backends. Tracks dependencies between signals and propagates updates automatically.
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tech:nodejs language:typescript linter:biome license:mit
Tracks which properties each effect reads and re-runs only when those properties change. Zero dependencies, TypeScript-first.
npm install @nerdalytics/beacon --save-exact # or yarn add @nerdalytics/beacon # or pnpm add @nerdalytics/beacon # or bun add @nerdalytics/beacon # or deno install npm:@nerdalytics/beacon # or npx jsr add @nerdalytics/beacon # or vlt install @nerdalytics/beacon
import { state, derive, effect } from '@nerdalytics/beacon'; const signal = state({ count: 0 }); const doubled = derive(() => signal.count * 2); const dispose = effect(() => { console.log(`Count: ${signal.count}, Doubled: ${doubled.value}`); }); // => "Count: 0, Doubled: 0" signal.count = 5; // => "Count: 5, Doubled: 10" dispose(); doubled.reactive = false;
Full documentation, API reference, and examples available at: nerdalytics.github.io/beacon
The handbook has plain-text endpoints for LLMs:
llms.txtlists available versions<version>/llms.txtlists pages for a version<version>/llms-full.txtconcatenates every page into one file
You can also append .md to any handbook page URL for its Markdown source (e.g. <version>/introduction.md).
MIT - See LICENSE for details.