@oleksii-pavlov/keyboard

@oleksii-pavlov/keyboard

A flexible, TypeScript-first library for handling keyboard events and hotkey combinations in a framework-agnostic way. Create composable handlers for hotkey selectors like Ctrl+C, Alt+Enter, or Cmd+Shift+Z.

• ✅ Declarative Hotkey definitions Ctrl+C, Ctrl+Alt+Enter
• ✅ Pluggable into any environment (DOM, React, Vue, etc.)
• ✅ Support for multiple named/anonymous handlers per hotkey
• ✅ Built-in alias mapping (Cmd, Option, Esc etc.)
• ✅ Use on keydown, keyup, or keypress — your choice

📦 Installation

npm install @oleksii-pavlov/keyboard

✨ Usage

Import

import { keyboard } from '@oleksii-pavlov/keyboard'

🧠 Selector Syntax

Selectors are simple strings like:

• "Ctrl+S"
• "Cmd+Shift+K"
• "Alt+Enter"
• "Plus" (matches the + key)
• "Minus" (matches the - key)

The full list of aliases is:

Alias	Normalized As
Ctrl, Control	ctrl
Shift	shift
Alt, Option	alt
Meta, Cmd, Command	meta
Plus	+
Minus	-
Esc, Escape	escape
Enter, Return	enter
Space	' '
Up	arrowup
Down	arrowdown
Left	arrowleft
Right	arrowright

🔌 Framework-Agnostic Integration

The handlers you create are just pure callbacks that accept a KeyboardEvent — bind them wherever and however you like:

✅ Vanilla JavaScript

// create handler with Hotkey and callback
const handler = keyboard.setHandler('Ctrl+S', (e) => {
  e.preventDefault()
  alert('Saved!')
})

// apply handler wherever you need
window.addEventListener('keydown', handler) // or 'keyup', 'keypress'

✅ React

useEffect(() => {
  const handler = keyboard.setHandler('Ctrl+S', (e) => {
    e.preventDefault()
    alert('Saved from React!')
  })

  window.addEventListener('keydown', handler)
  return () => window.removeEventListener('keydown', handler)
}, [])

✅ Element level

import { keyboard } from '@oleksii-pavlov/keyboard'

const input = document.querySelector('input')!

// Handle Ctrl+Enter inside the input
const handler = keyboard.setHandler('Ctrl+Enter', (e) => {
  alert('Submitted from input!')
})

// apply handler for the input
input.addEventListener('keydown', handler)

🧩 API Overview

keyboard.setHandler(selector, callback)

Replaces all handlers for the given selector with a new anonymous one. Use this for global hotkeys to prevent conflicts.

keyboard.setHandler('Ctrl+S', (e) => {
  console.log('Saved!')
})

keyboard.addHandler(selector, callback)

Adds an anonymous handler without removing existing ones.

keyboard.setNamedHandler(selector, name, callback)

Sets a named handler (removing others for that selector/hotkey).

keyboard.setNamedHandler('Ctrl+Z', 'undo', (e) => {
  console.log('Undo!')
})

keyboard.addNamedHandler(selector, name, callback)

Adds a named handler to the selector.

keyboard.addNamedHandler('Ctrl+Z', 'customUndo', (e) => {
  console.log('Custom Undo (override behavior)')
})

keyboard.removeHandlers(selector)

Removes all handlers for the selector.

keyboard.removeNamedHandler(selector, name)

Removes a specific named handler from given selector.

keyboard.removeNamedHandlersForAllSelectors(name)

Removes a named handler across all selectors.

💡 Use Case: Multiple Named Handlers per Hotkey

const loggerHandler = keyboard.addNamedHandler('Ctrl+C', 'logger', (e) => {
  console.log('Ctrl+C pressed')
})

const clipboardHandler = keyboard.addNamedHandler('Ctrl+C', 'clipboard', (e) => {
  console.log('Intercepted copy to clipboard')
})

Now bind it once:

window.addEventListener('keydown', loggerHandler)
window.addEventListener('keydown', clipboardHandler)

Output when pressing Ctrl+C

Ctrl+C pressed
Intercepted copy to clipboard

Remove one handler by name:

keyboard.removeNamedHandler('Ctrl+C', 'logger')

Output now:

Intercepted copy to clipboard

Remove all handlers:

keyboard.removeHandlers('Ctrl+C')

🧪 Advanced: Dynamic Registration

keyboard.addNamedHandler('Cmd+K', 'openSearch', () => {
  console.log('Open search')
})

keyboard.addNamedHandler('Cmd+K', 'logger', () => {
  console.log('Cmd+K triggered')
})

keyboard.addNamedHandler('Cmd+W', 'logger', () => {
  console.log('Cmd+W triggered')
})

// removes from both Cmd+K and Cmd+W
keyboard.removeNamedHandlersForAllSelectors('logger')

🔍 Exports

From the main entrypoint:

• keyboard — instance of Keyboard. Manages handlers creating and deleting

Also includes:

• keyAliases, keyFilters - mappers used to differentiate hotkeys
• Types:
  • Selector = string - for hotkeys. Example: "Ctrl+K"
  • Key = string - for single keys. Example: "K"
  • Handler = [ Name, Callback ] - entry for selector handlers
  • Name = string | number | symbol - represents the name of the handler
  • Filter = (e: KeyboardEvent) => boolean - checks that specific key is pressed
  • Callback = (e: KeyboardEvent) => void - generated callback to be applied by client code

✅ Compatible Environments

• Browser (DOM events)
• React / Vue / Svelte / SolidJS
• Vanilla JS or TS projects
• Electron / Tauri / Webview apps
• Node.js with simulated events (for testing)