nuxt-svg-sprite-icon

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nuxt-svg-sprite-icon

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A powerful SVG sprite module for Nuxt 3 that automatically generates SVG sprites from your assets and provides an easy-to-use component for displaying icons.

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# Nuxt SVG Sprite Icon
<p align="center">
  <img width="200px" src="./assets/nuxt-svg-sprite-icon.png" />
</p>

<p align=center>A powerful SVG sprite module for Nuxt 3 & Nuxt 4 that automatically generates SVG sprites from your assets and provides an easy-to-use component for displaying icons.</p>

## Features

- 🚀 **Auto-generated SVG sprites** - Automatically scans and converts SVG files to sprite format
- 📁 **Nested folder support** - Organize your icons in folders for better structure
- 🎨 **CSS-only styling** - Full control over appearance using CSS classes
- ⚡ **Hot reload** - Development mode file watching for instant updates
- 🎯 **TypeScript support** - Full type safety out of the box
- 🌈 **Framework agnostic** - Works seamlessly with UnoCSS, Tailwind, or any CSS framework
- 📦 **Zero configuration** - Works out of the box with sensible defaults
- 🪶 **Lightweight** - Minimal API surface with maximum flexibility
- 🔧 **Enhanced SVG compatibility** - Handles complex SVGs with styles, IDs, and defs

## Quick Setup

1. Add `nuxt-svg-sprite-icon` dependency to your project

```bash
# Using pnpm
pnpm add -D nuxt-svg-sprite-icon

# Using yarn
yarn add --dev nuxt-svg-sprite-icon

# Using npm
npm install --save-dev nuxt-svg-sprite-icon
```

2. Add `nuxt-svg-sprite-icon` to the `modules` section of `nuxt.config.ts`

```js
export default defineNuxtConfig({
  modules: [
    'nuxt-svg-sprite-icon'
  ]
})
```

3. Create your SVG assets directory and add some SVG files

```
assets/
  svg/
    home.svg
    search.svg
    user/
      profile.svg
      settings.svg
```

4. Use the SVG icons in your components

```vue
<template>
  <div>
    
    <SvgIcon name="home" />
    
    
    <SvgIcon name="home" class="w-6 h-6 text-blue-500" />
    
    
    <SvgIcon name="user/profile" class="w-8 h-8 fill-green-500" />
    
    
    <div class="w-100px h-100px">
      <SvgIcon name="search" class="w-full h-full fill-red-500" />
    </div>
  </div>
</template>
```

That's it! You can now use SVG icons with complete CSS control ✨

## SVG Compatibility

This module has enhanced SVG processing capabilities that handle various types of SVG files:

### ✅ Supported SVG Features

- **Inline styles and CSS classes** - Automatically converts `<style>` tags and CSS classes to inline styles
- **Gradients / Paint servers (`url(#...)`)** - Supports `linearGradient` / `radialGradient` (including `fill="url(#...)"` and `stroke="url(#...)"`)
- **Complex defs** - Preserves functional definitions like `clipPath`, `mask`, `pattern`, and `filter`
- **ID conflict resolution** - Automatically prefixes IDs to prevent conflicts between different sprites
- **Various SVG formats** - Works with SVGs from different design tools (Figma, Sketch, Illustrator, etc.)

### Examples of Supported SVG Types

**SVG with CSS styles:**
```xml
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 19.721 17.39">
    <defs>
        <style>
            .cls-1{fill:#fff}
        </style>
    </defs>
    <path class="cls-1" d="M0 6.3L6 11..."/>
</svg>
```

**SVG with inline fills:**
```xml
<svg viewBox="0 0 24 24" xmlns="http://www.w3.org/2000/svg">
    <path fill="white" d="M9.84375 16.0469V19.1178..."/>
</svg>
```

**SVG with clipPaths and complex defs:**
```xml
<svg viewBox="0 0 24 24" xmlns="http://www.w3.org/2000/svg">
    <g clip-path="url(#clip0)">
        <path fill="white" d="..."/>
    </g>
    <defs>
        <clipPath id="clip0">
            <rect width="24" height="24"/>
        </clipPath>
    </defs>
</svg>
```

**SVG with gradients / paint servers (`url(#...)`):**
```xml
<svg width="20" height="20" viewBox="0 0 20 20" xmlns="http://www.w3.org/2000/svg">
  <defs>
    <linearGradient id="paint0_linear" x1="20" y1="0" x2="0" y2="20" gradientUnits="userSpaceOnUse">
      <stop stop-color="#FFCF45"/>
      <stop offset="1" stop-color="#FFB92A"/>
    </linearGradient>
  </defs>
  <path d="M10 1L12.5 7H19L14 11L16 18L10 14L4 18L6 11L1 7H7.5Z" fill="url(#paint0_linear)"/>
</svg>
```

All these formats are automatically processed and optimized for use in sprite systems while maintaining visual fidelity.

## Configuration

You can configure the module by adding a `svgSprite` section to your `nuxt.config.ts`:

```js
export default defineNuxtConfig({
  modules: ['nuxt-svg-sprite-icon'],
  svgSprite: {
    // Source directory for SVG files
    input: '~/assets/svg',
    
    // Output directory for generated sprites
    output: '~/assets/sprite/gen',
    
    // Default sprite name (for files in root of input directory)
    defaultSprite: 'icons',
    
    // Global CSS class for all svg-icon instances
    elementClass: 'svg-icon',
    
    // Whether to optimize SVG files (requires svgo)
    optimize: false
  }
})
```

### Nuxt 4 Configuration

For Nuxt 4 projects, you can use the new directory structure:

```js
export default defineNuxtConfig({
  future: {
    compatibilityVersion: 4,
  },
  modules: ['nuxt-svg-sprite-icon'],
  svgSprite: {
    // Use app directory for Nuxt 4
    input: './app/assets/svg',
    output: './app/assets/sprite/gen',
    defaultSprite: 'icons',
    elementClass: 'svg-icon',
  }
})
```

The module automatically detects Nuxt 4 compatibility mode and adjusts paths accordingly.

### Configuration Options

| Option | Type | Default | Description |
|--------|------|---------|-------------|
| `input` | `string` | `'~/assets/svg'` | Directory containing original SVG files |
| `output` | `string` | `'~/assets/sprite/gen'` | Directory for generated sprite files |
| `defaultSprite` | `string` | `'icons'` | Name of default sprite (for SVGs in root input directory) |
| `elementClass` | `string` | `'svg-icon'` | Global CSS class applied to all `<SvgIcon>` elements |
| `optimize` | `boolean` | `false` | Enable SVG optimization using SVGO |

## Component API

### SvgIcon Component

The `<SvgIcon>` component is automatically registered and available globally.

#### Props

| Prop | Type | Default | Description |
|------|------|---------|-------------|
| `name` | `string` | - | **Required.** Name of the icon (supports nested paths like `user/example`) |

#### Usage Examples

```vue
<template>
  
  <SvgIcon name="home" />
  
  
  <SvgIcon name="home" class="w-6 h-6" />
  <SvgIcon name="home" class="w-8 h-8" />
  
  
  <SvgIcon name="home" class="text-2xl" />
  <SvgIcon name="home" style="font-size: 3rem;" />
  
  
  <SvgIcon name="home" class="text-blue-500" />
  <SvgIcon name="home" class="fill-red-600" />
  
  
  <SvgIcon name="user/profile" class="w-10 h-10 text-green-500" />
  
  
  <div class="w-20 h-20">
    <SvgIcon name="search" class="w-full h-full fill-purple-500" />
  </div>
  
  
  <SvgIcon name="home" class="custom-icon" />
  
  
  <SvgIcon 
    name="home" 
    class="w-8 h-8 text-blue-500 hover:text-blue-700 transition-colors cursor-pointer" 
  />
  
  
  <SvgIcon name="home" class="w-4 h-4 md:w-6 md:h-6 lg:w-8 lg:h-8" />
</template>

.custom-icon:hover {
  color: #1d4ed8;
  transform: scale(1.1);
}
</style>
```

## File Organization

The module supports nested folder structures:

```
assets/svg/
├── home.svg              → <SvgIcon name="home" />
├── search.svg            → <SvgIcon name="search" />
├── user/
│   ├── profile.svg       → <SvgIcon name="user/profile" />
│   └── settings.svg      → <SvgIcon name="user/settings" />
└── admin/
    ├── dashboard.svg     → <SvgIcon name="admin/dashboard" />
    └── users.svg         → <SvgIcon name="admin/users" />
```

## Development

```bash
# Install dependencies
npm install

# Generate type stubs and prepare development environment
npm run dev:prepare

# Develop with the playground
npm run dev

# Build the playground
npm run dev:build

# Build the module
npm run prepack

# Run type checking
npm run test:types

# Release new version
npm run release
```

## CSS Framework Integration

### With UnoCSS/Tailwind CSS

```vue
<template>
  
  <SvgIcon name="home" class="w-6 h-6" />
  <SvgIcon name="home" class="w-8 h-8" />
  
  
  <SvgIcon name="home" class="text-blue-500" />
  <SvgIcon name="home" class="fill-red-600" />
  
  
  <SvgIcon 
    name="user/profile" 
    class="w-10 h-10 text-green-500 hover:text-green-700 transition-all duration-200" 
  />
  
  
  <SvgIcon name="home" class="w-4 h-4 sm:w-6 sm:h-6 lg:w-8 lg:h-8" />
  
  
  <div class="w-16 h-16 bg-gray-100 rounded-full flex items-center justify-center">
    <SvgIcon name="home" class="w-8 h-8 text-gray-600" />
  </div>
</template>
```

### With Custom CSS

```vue
<template>
  <SvgIcon name="home" class="icon-large" />
  <SvgIcon name="user/profile" class="icon-animated" />
</template>

.icon-animated {
  width: 2rem;
  height: 2rem;
  transition: transform 0.3s ease;
}

.icon-animated:hover {
  transform: rotate(180deg) scale(1.2);
}
</style>
```

## Troubleshooting

### Icons not displaying

1. **Check file paths**: Ensure your SVG files are in the correct directory
2. **Verify build**: Make sure the module generated sprite files in your output directory
3. **Check console**: Look for any error messages in the browser console
4. **Restart dev server**: Try restarting your development server

### Icons appear as squares

This usually indicates that the SVG files have incorrect or missing `viewBox` attributes. The module attempts to extract or generate appropriate viewBox values, but you may need to manually fix your SVG files.

### Size control issues

- Use `width` and `height` CSS properties or utility classes like `w-6 h-6`
- The default size is `1em`, so you can also control size via `font-size`
- For container-based sizing, use `w-full h-full` on the icon

## Performance Considerations

- All sprites are injected into the DOM on page load
- For large icon sets, consider organizing icons into different folders/sprites
- SVG optimization can help reduce file sizes (enable with `optimize: true`)
- The CSS-only approach means no JavaScript is needed for styling

## License

MIT.

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