# grunt-svg-sprite

[![npm version][npm-image]][npm-url] [![npm downloads][npm-downloads]][npm-url] [![Build Status][ci-image]][ci-url]

grunt-svg-sprite is a Grunt plugin wrapping around [svg-sprite](https://github.com/svg-sprite/svg-sprite) which **takes a bunch of [SVG](https://www.w3.org/TR/SVG/) files**, optimizes them and bakes them into **SVG sprites** of several types:

* Traditional [CSS sprites](https://en.wikipedia.org/wiki/Sprite_(computer_graphics)#Sprites_by_CSS) for use as background images,
* CSS sprites with **pre-defined `<view>` elements**, useful for foreground images as well,
* inline sprites using the **`<defs>` element**,
* inline sprites using the **`<symbol>` element**
* and [SVG stacks](http://simurai.com/blog/2012/04/02/svg-stacks/).

## Features & configuration? → [svg-sprite](https://github.com/svg-sprite/svg-sprite)

This document covers only Grunt specific installation and configuration aspects. For a full list of features and options, please see the [svg-sprite manual](https://github.com/svg-sprite/svg-sprite).

## Getting Started

This plugin requires Grunt `>=0.4.5`

If you haven't used [Grunt](https://gruntjs.com/) before, be sure to check out the [Getting Started](https://gruntjs.com/getting-started) guide, as it explains how to create a [Gruntfile](https://gruntjs.com/sample-gruntfile) as well as install and use Grunt plugins. Once you're familiar with that process, you may install this plugin with this command:

```sh
npm install grunt-svg-sprite --save-dev
```

Once the plugin has been installed, it may be enabled inside your Gruntfile with this line of JavaScript:

```js
grunt.loadNpmTasks('grunt-svg-sprite');
```

## The «svg_sprite» task

### Overview

In your project's Gruntfile, add a section named `svg_sprite` to the data object passed into `grunt.initConfig()`.

```js
grunt.initConfig({
  svg_sprite: {
    options: {
      // Task-specific options go here.
    },
    your_target: {
      // Target-specific file lists and/or options go here.
    },
  }
});
```

The task-specific `options` are optional and affect all defined targets. You may define as many targets (`your_target`) as you want.

### Targets

In the simplest case an «svg_sprite» target looks like this:

```js
your_target: {
  src: ['path/to/assets/**/*.svg'],
  dest: 'path/to/css/dir',
  options: {
    // Target-specific options
  }
},
```

However, as the `path/to/assets` would become part of the shape IDs, you will most likely want to add a working directory in most cases:

```js
your_target: {
  expand: true,
  cwd: 'path/to/assets',
  src: ['**/*.svg'],
  dest: 'path/to/css/dir',
  options: {
    // Target-specific options
  }
},
```

### Options

As **target-specific options** you may provide a [main configuration object](https://github.com/svg-sprite/svg-sprite/blob/main/docs/configuration.md) as described in the *svg-sprite* manual. Configuration-wise, *svg-sprite* and *grunt-svg-sprite* differ only in one respect:

#### options.dest → dest

Type: `String`
Default value: `'.'`

Instead of being nested inside the `options` object, *svg-sprite*'s `dest` property gets **promoted one level up** and becomes part of the Grunt target configuration itself (see examples above).

### Usage Examples

#### Basic example

In this very basic example, mostly default settings will be applied to create a traditional CSS sprite (bundle of SVG sprite and CSS stylesheet).

```js
grunt.initConfig({
  svg_sprite: {
    basic: {
      // Target basics
      expand: true,
      cwd: 'assets',
      src: ['**/*.svg'],
      dest: 'out',
      // Target options
      options: {
        mode: {
          css: { // Activate the «css» mode
            render: {
              css: true // Activate CSS output (with default options)
            }
          }
        }
      }
    }
  }
});
```

The following files and directories are created:

```text
out/
├─ css/
│  ├─ sprite.css
│  ├─ svg/
│  │  ├─ sprite.css-495d2010.svg
```

> The cryptical looking part in the SVG's file name is the result of *svg-sprite*'s cache busting feature which is enabled by default for CSS sprites. We'll turn this off in the next example.

#### More complex example

The following example is a little more complex:

* We'll create a **«view» CSS sprite** and a **«symbol» sprite** in one go.
* Instead of CSS, we'll render a **Sass stylesheet** resource for the «view» sprite.
* We'll **turn off cache busting** for the «view» sprite and create **extra CSS rules specifying each shape's dimensions**.
* We'll **downscale the SVG shapes** to 32×32 pixels if necessary and **add 10 pixels padding** to all sides.
* We'll keep the intermediate SVG source files.

```js
grunt.initConfig({
  svg_sprite: {
    complex: {
      // Target basics
      expand: true,
      cwd: 'assets',
      src: ['**/*.svg'],
      dest: 'out',
      // Target options
      options: {
        shape: {
          dimension: {      // Set maximum dimensions
            maxWidth: 32,
            maxHeight: 32
          },
          spacing: {        // Add padding
            padding: 10
          },
          dest: 'out/intermediate-svg'  // Keep the intermediate files
        },
        mode: {
          view: {           // Activate the «view» mode
            bust: false,
            render: {
              scss: true    // Activate Sass output (with default options)
            }
          },
          symbol: true      // Activate the «symbol» mode
        }
      }
    }
  }
});
```

The following files and directories are created:

```text
out/
├─ intermediate-svg
│  ├─ weather-clear.svg
│  ├─ weather-snow.svg
│  ├─ weather-storm.svg
├─ symbol/
│  ├─ svg/
│     ├─ sprite.symbol.svg
├─ view/
│  ├─ sprite.scss
│  ├─ svg/
│     ├─ sprite.view.svg
```

#### Advanced features

For more advanced features like

* [custom transformation](https://github.com/svg-sprite/svg-sprite/blob/main/docs/configuration.md#svg-transformations),
* [meta data injection](https://github.com/svg-sprite/svg-sprite/blob/main/docs/meta-data.md),
* [customizing output templates](https://github.com/svg-sprite/svg-sprite/blob/main/docs/templating.md) or
* introducing new output formats

please refer to the [svg-sprite manual](https://github.com/svg-sprite/svg-sprite).


## Contributing

In lieu of a formal styleguide, take care to maintain the existing coding style. Add unit tests for any new or changed functionality. Lint and test your code using [Grunt](https://gruntjs.com/).


## Changelog

Please refer to the [GitHub releases](https://github.com/svg-sprite/grunt-svg-sprite/releases) for a complete release history.


## Legal

Copyright © 2018 Joschi Kuphal <joschi@kuphal.net> / [@jkphl](https://twitter.com/jkphl). *grunt-svg-sprite* is licensed under the terms of the [MIT license](LICENSE). The contained example SVG icons are part of the [Tango Icon Library](http://tango.freedesktop.org/Tango_Icon_Library) and belong to the Public Domain.


[npm-url]: https://www.npmjs.com/package/grunt-svg-sprite
[npm-image]: https://img.shields.io/npm/v/grunt-svg-sprite
[npm-downloads]: https://img.shields.io/npm/dm/grunt-svg-sprite

[ci-url]: https://github.com/svg-sprite/grunt-svg-sprite/actions?query=workflow%3ATests+branch%3Amain
[ci-image]: https://img.shields.io/github/actions/workflow/status/svg-sprite/grunt-svg-sprite/test.yml?branch=main&label=CI&logo=github