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  • License MIT

The JavaScript-native styling engine for the modern web

Package Exports

  • chaincss
  • chaincss/compiler
  • chaincss/plugin/vite
  • chaincss/plugin/webpack
  • chaincss/runtime

Readme

ChainCSS

npm version License: MIT Live Demo

ChainCSS The JavaScript-native styling engine for the modern web.

Note: The previous package @melcanz85/chaincss is no longer supported.
Please install this updated chaincss instead: npm install chaincss

✨ Features

Core Styling

Feature Description Example
Chainable API Intuitive method chaining $.color('red').padding('10px')
Shorthand Properties Write less, do more $.bg('blue').c('white').p('20px')
CSS Properties All standard CSS properties $.display('flex').gap('1rem')
Multiple Selectors Style multiple elements .$el('.btn', '.button')
Hover States Interactive styles .hover().bg('darkblue').end()
Responsive Breakpoints Built-in breakpoint methods .mobile(css => css.p('1rem'))
Media Queries Custom media queries .media('(max-width: 768px)', ...)

🚀 Advanced Features

Feature Description Example
Animation Presets Pre-built animations .fadeIn().duration('0.3s')
Math Helpers CSS calc() helpers $.width($.calc('100% - 20px'))
Design Tokens Centralized design values tokens.get('colors.primary')
Debug Mode Console debugging for styles $.debug().bg('red')
Source Comments Track style origins /* Generated from: nav.chain.js:15 */
Style Timeline Track style changes chaincss build --timeline

🏗️ Build System

Feature Command/Flag
CSS Compilation chaincss build
Watch Mode chaincss watch
Config File chaincss.config.js
Auto-prefixer Built-in via --prefixer
Minification Global.css minified, components unminified
TypeScript Support Full type definitions
Source Maps For debugging

⚛️ Framework Support

Framework Support
React ✅ useChainStyles hook, createStyledComponent
Vue ✅ useAtomicClasses composable
Solid ✅ Coming soon
Svelte ✅ Coming soon
Vanilla ✅ Runtime mode

🔌 Plugins

Plugin Description
Vite Automatic .chain.js compilation
Webpack Build-time integration
Next.js SSR support

📁 File Structure

src/
├── components/
│   └── Button/
│       ├── Button.tsx
│       └── styles/
│           ├── button.chain.js    # Source styles
│           ├── button.class.js    # Generated class names
│           └── button.css         # Generated CSS
├── global-style/
│   ├── global.chain.js             # Global styles
│   └── global.css                  # Combined CSS
└── chaincss.config.js              # Configuration

📦 Installation

npm install chaincss

🚀 Quick Start

1. Initialize configuration

npx chaincss init
# or for full configuration
npx chaincss init --full

2. Create your first style

// src/components/Button/styles/button.chain.js
import { $ } from 'chaincss';

export const button = $
  .bg('#667eea')
  .c('white')
  .p('12px 24px')
  .rounded('8px')
  .cursor('pointer')
  .hover()
    .bg('#5a67d8')
  .end()
  .$el('.btn');

3. Build styles

npx chaincss build

4. Use in React

import { button } from './styles/button.class.js';
import './styles/button.css';

function Button() {
  return <button className={button}>Click me</button>;
}

📝 Examples

Responsive Design

export const title = $
  .fontSize('3rem')
  .mobile(css => css.fontSize('1.5rem'))
  .tablet(css => css.fontSize('2rem'))
  .desktop(css => css.fontSize('2.5rem'))
  .$el('.title');

Animations

export const card = $
  .fadeInUp({ duration: '0.5s' })
  .pulse({ duration: '2s', iteration: 'infinite' })
  .bg('white')
  .rounded('12px')
  .$el('.card');

Math Helpers

export const container = $
  .width($.calc('100% - 40px'))
  .padding($.add($.rem(2), $.px(10)))
  .margin($.subtract('100vw', '20px'))
  .$el('.container');

Shorthand Properties

export const card = $
  .bg('white')
  .c('gray-800')
  .p('20px')
  .m('10px')
  .rounded('8px')
  .shadow('lg')
  .$el('.card');

⚙️ Configuration

Create chaincss.config.js:

export default {
  inputs: ['src/**/*.chain.js'],
  output: 'dist/styles',
  atomic: {
    enabled: false,  // Enable atomic CSS optimization
    naming: 'readable'  // or 'hash' for production
  },
  prefixer: {
    enabled: true  // Auto-prefixer for cross-browser support
  },
  breakpoints: {
    mobile: '(max-width: 768px)',
    tablet: '(min-width: 769px) and (max-width: 1024px)',
    desktop: '(min-width: 1025px)'
  },
  debug: false,
  verbose: false
};

🎯 Runtime Mode (Optional)

For dynamic styles without build step:

import { useChainStyles } from 'chaincss/runtime';

function DynamicButton() {
  const styles = useChainStyles({
    button: {
      backgroundColor: '#667eea',
      color: 'white',
      padding: '12px 24px'
    }
  });
  
  return <button className={styles.button}>Click me</button>;
}

📊 CLI Commands

Command Description
chaincss init Create config file
chaincss init --full Create full config with all options
chaincss build Build all styles
chaincss build --timeline Build with timeline tracking
chaincss watch Watch for changes
chaincss clean Remove generated files

🔧 Package.json Scripts

{
  "scripts": {
    "dev": "concurrently \"npm:css:watch\" \"vite\"",
    "build": "npm run css:build && vite build",
    "css:build": "chaincss build",
    "css:watch": "chaincss watch",
    "css:clean": "chaincss clean"
  }
}

📚 Documentation

For complete guide, API reference, and examples:

Documentation

🤝 Contributing

Contributions are welcome! Please read our Contributing Guide.

📄 License

MIT © Rommel Caneos

🌟 Star History

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