Utils Core

Zero-dependency utilities for modern development across all runtimes.

Features

• Zero dependencies - No external packages required.
• Broadcast - Global named-channel event bus.
• Sequential - Async function queue with sequential execution guarantee.
• Signal - Typed event emitter with error-isolated listeners.
• Store - Reactive state container with reducer updates.

Installation

[!NOTE] Prerequisites: For Deno (install from deno.com). For npm use Node.js (e.g. nodejs.org).

Deno (JSR):

deno add jsr:@neabyte/utils-core

npm:

npm install @neabyte/utils-core

CDN (jsDelivr/unpkg/esm.sh):

<script type="module">
  import {
    createSignal,
    createStore,
    broadcast
  } from 'https://cdn.jsdelivr.net/npm/@neabyte/[email protected]/dist/index.mjs'
</script>

Or via esm.sh:

<script type="module">
  import { createSignal, createStore, broadcast } from 'https://esm.sh/@neabyte/[email protected]'
</script>

Or via importmap:

<script type="importmap">
  {
    "imports": {
      "@neabyte/utils-core": "https://cdn.jsdelivr.net/npm/@neabyte/[email protected]/dist/index.mjs"
    }
  }
</script>
<script type="module">
  import { createSignal } from '@neabyte/utils-core'
</script>

Quick Start

import { createSignal, createStore, broadcast } from '@neabyte/utils-core'

// Signal - event emitter
const signal = createSignal<[string]>()
signal.subscribe(msg => console.log(msg))
signal.emit('hello') // 'hello'

// Store - reactive state
const store = createStore(0)
store.subscribe(() => console.log(store.getState()))
store.setState(n => n + 1) // 1

// Broadcast - global event bus
broadcast.on('user:login', user => console.log(user))
broadcast.emit('user:login', { id: 1 })

• docs/README.md for full documentation.

Build

npm build (bundles to dist/):

npm run build

Testing

Type check - format, lint, and type-check:

deno task check

Unit tests - format/lint tests and run all tests:

deno task test

• Tests live under tests/ (signal, store, and broadcast tests).
• The test task uses --allow-read, --allow-write, and --allow-env.

License

This project is licensed under the MIT license. See the LICENSE file for details.