# @meonode/ui
[](https://www.npmjs.com/package/@meonode/ui)
[](https://opensource.org/licenses/MIT)
[](https://bundlephobia.com/package/@meonode/ui)
**Type-safe React components without JSX**
A production-ready component library that replaces JSX with function-based composition, featuring direct CSS prop
styling, context-based theming, automatic memoization, and full React Server Components support—powered by
@emotion/react.
## Core Concept
MeoNode UI eliminates JSX while maintaining full React compatibility through functional composition. Style components
with CSS properties as props, leverage automatic theme resolution via React Context, and benefit from intelligent
caching without manual optimization.
**JSX Pattern:**
```tsx
{title}
{children}
```
**MeoNode Pattern:**
```typescript
Div({
padding: '20px',
borderRadius: '12px',
backgroundColor: 'theme.primary',
children: [H2(title, { fontSize: '1.5rem', marginBottom: '8px' }), ...children],
})
```
## Features
### Function-Based Composition
Plain JavaScript functions replace JSX—no build transforms, no syntax extensions. Compose UIs as first-class function
trees with full TypeScript inference.
### Direct CSS-in-Props
Pass CSS properties directly to components. No separate styled-components declarations, no className juggling. All valid
CSS properties work as props with full type safety.
```typescript
Button('Submit', {
padding: '12px 24px',
backgroundColor: 'theme.primary',
borderRadius: 8,
transition: 'all 0.2s ease',
css: {
':hover': { transform: 'scale(1.05)' },
},
})
```
### Advanced Portal System
Manage complex UI layers like modals, drawers, and overlays with a powerful stack-based portal system. Supports nested portals and state synchronization.
**Key Features:**
- **Global Layout Integration:** Define the provider and host at the root for app-wide access.
- **Auto-Sync:** Keep portal content in sync with parent state automatically.
- **Nested Portals:** Open portals from within other portals easily.
- **Stack-based management:** Automatically manages multiple overlapping layers.
```typescript
// 1. Setup at Layout Level
const RootLayout = ({ children }: { children: ReactNode }) =>
PortalProvider({
children: [
...children,
PortalHost() // Portals render here, on top of content
]
})
// 2. Define data interface and portal content
interface MyData {
count: number;
setCount: React.Dispatch>;
}
const MyPortalContent = ({ data, close }: PortalLayerProps) =>
Div({
children: [
Text(`Count: ${data?.count}`),
Button('Increment', { onClick: () => data?.setCount(c => c + 1) }),
Button('Close', { onClick: close })
]
})
// 3. Use anywhere in the tree
const MyComponent = () => {
const [count, setCount] = useState(0)
// Auto-sync: portal updates whenever count changes
const portal = usePortal({ count, setCount })
return Div({
children: [
Button('Open Modal', {
onClick: () => portal.open(MyPortalContent)
})
]
})
}
```
### Context-Based Theming
Theme values resolve automatically through React Context. Reference semantic tokens anywhere without prop drilling.
Supports nested themes and dynamic switching.
```typescript
ThemeProvider({
theme: {
mode: 'dark',
system: {
primary: { default: '#FF6B6B', content: '#4A0000' },
spacing: { sm: 8, md: 16, lg: 24 },
},
},
children: [
/* your app */
],
})
```
### Surgical Memoization
Memoize at node-level granularity—not just entire components. Control re-renders with precision by specifying dependency
arrays directly on individual nodes.
**Node-Level Memoization:**
```typescript
const UserCard = ({ user }) =>
Div(
{
padding: 16,
children: [
H2(user.name), // Re-renders on any prop change
Text(user.bio),
],
},
[user.id],
).render() // Only re-render when user.id changes
```
**Component-Level Memoization:**
```typescript
Node(ExpensiveComponent, { data }, [data.id]).render()
```
### React Server Components Compatible
Full RSC support with proper client/server component boundaries. Use in Next.js App Router, Remix, or any RSC-enabled
environment without configuration.
### Emotion-Powered Styling
Built on @emotion/react for:
- Automatic critical CSS extraction
- Vendor prefixing
- Dead code elimination
- Server-side rendering support
### Smart Prop Differentiation
Automatically separates style props from DOM attributes. Pass `onClick`, `aria-*`, `data-*` alongside CSS props—MeoNode
routes them correctly.
```typescript
Button('Click Me', {
padding: '12px', // → style
color: 'theme.primary', // → style
onClick: handleClick, // → DOM attribute
'aria-label': 'Submit', // → DOM attribute
disabled: isLoading, // → DOM attribute
})
```
## Performance Benchmarks
MeoNode is built for high-performance applications, featuring an optimized caching system and iterative rendering
engine.
### Layout Rendering
| Metric | Value | Description |
|:------------------------|:--------|:----------------------------------------------------|
| **Single-Page Layout** | ~9ms | Full SPA layout with header, hero, features, etc. |
| **10,000 Flat Nodes** | ~304ms | Rendering 10k nodes at the same level |
| **10,000 Nested Nodes** | ~1604ms | Deeply nested structure (single parent-child chain) |
### Memory Management
| Metric | Value | Description |
|:---------------------------|:-------------|:-------------------------------------------------|
| **Navigation Memory Leak** | **-7.24 MB** | Memory is efficiently reclaimed after navigation |
| **Mount/Unmount Cycles** | Stable | No leaks detected over 200 cycles |
| **State Updates** | Efficient | Handles heavy state changes without bloating |
### Form Input Performance
| Metric | Value | Description |
|:----------------------|:------------|:------------------------------------------------|
| **Avg Response Time** | **2.54 ms** | 100 controlled inputs with simulated typing |
| **Max Response Time** | 4.09 ms | Worst-case scenario remains instant |
| **Optimization** | `deps` | Granular updates prevent unnecessary re-renders |
### React Comparison (10k Flat Nodes)
| Implementation | Time (ms) | Initial Mem |
|:------------------------|:----------|:------------|
| **React.createElement** | ~90ms | ~230 MB |
| **MeoNode** | ~186ms | ~344 MB |
> **Note**: While slightly slower in raw micro-benchmarks due to the feature-rich object syntax, MeoNode excels in
> real-world scenarios with its intelligent caching and memory management.
## Quick Start
```typescript
import { ThemeProvider, Center, Column, H1, Button, Text } from '@meonode/ui'
const theme = {
mode: 'light',
system: {
primary: { default: '#FF6B6B', content: '#FFFFFF' },
base: { default: '#F8F8F8', content: '#333333' },
},
}
const App = () =>
ThemeProvider({
theme,
children: [
Center({
padding: 40,
backgroundColor: 'theme.base',
children: Column({
gap: 24,
children: [
H1('MeoNode UI', {
fontSize: '3rem',
color: 'theme.primary',
}),
Text('Type-safe React without JSX', {
fontSize: '1.2rem',
color: 'theme.base.content',
}),
Button('Get Started', {
backgroundColor: 'theme.primary',
color: 'theme.primary.content',
padding: '12px 24px',
borderRadius: 8,
cursor: 'pointer',
onClick: () => console.log('Started!'),
}),
],
}),
}),
],
}).render()
```
## Architecture
**Component Factory System**
`Node` factory + `Component` wrapper + semantic elements (Div, Button, etc.) enable both rapid prototyping and
sophisticated component architectures.
**Theme Resolution Engine**
Context-based theme propagation with automatic value resolution. Nested theme objects inherit and override parent values
without explicit passing.
**CSS Engine**
@emotion/react provides CSS-in-JS with automatic optimization, critical CSS extraction for SSR, and zero-runtime
overhead in production builds.
## Why MeoNode UI?
**For Teams Building Design Systems:**
- Context-based theme propagation
- Semantic token system ensures visual consistency
- Component composition patterns scale naturally
- Full TypeScript support catches design token errors
**For Performance-Critical Applications:**
- Emotion's CSS optimization and caching
- Surgical memoization at node granularity
- SSR-ready with critical CSS extraction
- RSC compatibility for modern React architectures
**For Developer Productivity:**
- No JSX compilation overhead
- Direct CSS-in-props reduces context switching
- Intelligent prop routing (style vs DOM attributes)
- Full autocomplete for all CSS properties
- Composable function trees with first-class JavaScript
## Documentation
📚 **[Complete Documentation & Examples](https://ui.meonode.com)**
🎮 **[Interactive Playground](https://codesandbox.io/p/github/l7aromeo/nextjs-meonode/main?import=true)**
## Contributing
We welcome contributions! Please see
our [contributing guidelines](https://github.com/l7aromeo/meonode-ui/blob/main/CONTRIBUTING.md).
## License
MIT © [Ukasyah Rahmatullah Zada](https://github.com/l7aromeo)
---
**[📖 Full Documentation](https://ui.meonode.com)** • **[🐛 Issues](https://github.com/l7aromeo/meonode-ui/issues)** • *
*[💬 Discussions](https://github.com/l7aromeo/meonode-ui/discussions)**