@nine-slice-frame/solid

Nine-slice scaling component for Solid.js using CSS border-image.

🎯 Live Demo & Tester Tool

What is Nine-Slice Scaling?

Nine-slice scaling divides an image into 9 sections, allowing it to scale to any size while preserving corner details and preventing distortion. Perfect for UI frames, borders, panels, and buttons that need to scale dynamically.

┌─────────┬───────────┬─────────┐
│ Corner  │ Top Edge  │ Corner  │
│ (Fixed) │ (Scale H) │ (Fixed) │
├─────────┼───────────┼─────────┤
│  Left   │  Center   │  Right  │
│  Edge   │ (Scale    │  Edge   │
│(Scale V)│  Both)    │(Scale V)│
├─────────┼───────────┼─────────┤
│ Corner  │ Bottom    │ Corner  │
│ (Fixed) │   Edge    │ (Fixed) │
└─────────┴───────────┴─────────┘

Why Nine-Slice Scaling?

The Problem: Traditional image scaling stretches the entire image uniformly, distorting corners, borders, and decorative elements. This makes UI elements look unprofessional and breaks visual consistency.

The Solution: Nine-slice scaling keeps corners and edges crisp while only stretching the middle sections. This means:

• Single image, infinite sizes - One asset works for buttons, dialogs, and panels of any dimension
• Pixel-perfect corners - Ornate borders and rounded corners stay sharp at any scale
• Smaller file sizes - No need for multiple image variants for different sizes
• Ideal for pixel art - Preserves the crisp aesthetic of retro-style UIs
• CSS-native performance - Uses browser-native border-image, no canvas or WebGL overhead

Common Use Cases:

• Game UI frames and dialog boxes
• Decorative borders and panels
• Scalable buttons with ornate edges
• Retro/pixel art interfaces
• Dynamic content containers

Why This Library?

Zero Dependencies - No runtime dependencies beyond Solid.js. This package only requires Solid.js as a peer dependency.

Incredibly Small - Minimal bundle impact: 3.09KB / 1.28KB gzipped

Native Performance - Uses browser-native CSS border-image property, not canvas rendering or heavy image manipulation libraries. Fast, efficient, and hardware-accelerated.

Framework-Agnostic API - Same simple, consistent API across all frameworks:

• @nine-slice-frame/react
• @nine-slice-frame/vue
• @nine-slice-frame/svelte
• @nine-slice-frame/solid (you are here)

Installation

npm install @nine-slice-frame/solid
# or
pnpm add @nine-slice-frame/solid
# or
yarn add @nine-slice-frame/solid

Usage

import { NineSliceFrame } from '@nine-slice-frame/solid';

function App() {
  return (
    <NineSliceFrame
      imagePath="/ui/frame.png"
      slice={7}
      borderWidth={5}
      repeat="stretch"
      fill={true}
      pixelated={true}
    >
      <p>Your content here</p>
    </NineSliceFrame>
  );
}

Props

| Prop | Type | Default | Description | | ------------- | --------------------------------------------- | ----------- | --------------------------------------------------------------------------------- | | imagePath | string | required | Path to the image (relative to public folder) | | slice | number \| object | 8 | Slice values - number for uniform, or { top, right, bottom, left } for per-edge | | borderWidth | number | 5 | Visual border width in pixels | | repeat | 'stretch' \| 'repeat' \| 'round' \| 'space' | 'stretch' | Border repeat mode | | fill | boolean | true | Use 'fill' to show center of image as background | | pixelated | boolean | true | Use pixelated rendering for pixel art | | class | string | '' | Additional CSS class names | | style | JSX.CSSProperties | {} | Additional inline styles |

Advanced Usage

Different Slice Values Per Edge

<NineSliceFrame
  imagePath="/ui/fancy-frame.png"
  slice={{ top: 10, right: 8, bottom: 10, left: 8 }}
  borderWidth={6}
>
  Content with asymmetric border
</NineSliceFrame>

Custom Styling

<NineSliceFrame
  imagePath="/ui/frame.png"
  slice={8}
  borderWidth={10}
  class="my-custom-frame"
  style={{ padding: '20px', 'min-height': '200px' }}
>
  Styled content
</NineSliceFrame>

TypeScript

This package includes TypeScript definitions out of the box.

Requirements

• solid-js >= 1.8.0

License

MIT © Callum Gander

Links

• Main Repository
• Live Demo
• Report Issues