@lonestone/usetheme

useTheme

A React hook for implementing theme management with support for light, dark, and system themes.

Installation

npm install @lonestone/usetheme
# or
yarn add @lonestone/usetheme
# or
pnpm add @lonestone/usetheme

Features

• 🌓 Support for light and dark themes
• 🖥️ System theme detection and synchronization
• 💾 Persistent theme storage
• 🔄 Automatic theme switching
• 🎨 CSS class-based theming
• 💪 TypeScript support

Usage

import { ThemeProvider, useTheme } from '@lonestone/usetheme'

// Wrap your app with ThemeProvider
function App() {
  return (
    <ThemeProvider
      defaultTheme="system" // Optional: 'light' | 'dark' | 'system'
      storageKey="my-app-theme" // Optional: custom storage key
    >
      <YourApp />
    </ThemeProvider>
  )
}

// Use the hook in your components
function ThemeToggle() {
  const { theme, systemTheme, setTheme } = useTheme()

  return (
    <div>
      <p>Current theme: {theme}</p>
      <p>System theme: {systemTheme}</p>
      <button onClick={() => setTheme('light')}>Light</button>
      <button onClick={() => setTheme('dark')}>Dark</button>
      <button onClick={() => setTheme('system')}>System</button>
    </div>
  )
}

API Reference

ThemeProvider Props

Prop	Type	Default	Description
defaultTheme	'light' | 'dark' | 'system'	'system'	Default theme to use
storageKey	string	'vite-ui-theme'	Local storage key for persisting the theme
children	React.ReactNode	-	Child components

useTheme Hook Return Value

Property	Type	Description
theme	'light' | 'dark' | 'system'	Current theme setting
systemTheme	'light' | 'dark'	Current system theme (when theme='system')
setTheme	(theme: Theme) => void	Function to update the theme

How it Works

The hook automatically:

• Adds appropriate theme classes (light or dark) to the document root
• Syncs with system theme preferences when set to 'system'
• Persists theme choice in localStorage
• Provides real-time theme updates

CSS Usage

The theme provider adds either light or dark class to your document's root element. You can style your application accordingly:

:root.light {
  --background: #ffffff;
  --text: #000000;
}

:root.dark {
  --background: #000000;
  --text: #ffffff;
}

License

This project is licensed under the Unlicense.

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.