Webpack SVG sprite loader for boi

声明：此loader是在svg-sprite-loader为基础，针对本人具体的项目需求做了些微修改。

以下是原文档：

It's like style-loader but for SVG:

• Creates a single SVG sprite from a set of images.
• Raster images support (PNG, JPG and GIF).
• Custom sprite implementation support.

How it works

When you require an image, loader transforms it to SVG symbol and add it to the array in special sprite class. When browser event DOMContentLoaded fires sprite will be rendered and injected as first child of document.body. Require statement e.g. require('svg-sprite!./image.svg') returns a symbol id, so you can reference it later in <svg><use xlink:href="#id"/></svg>. Raster images will be inlined (base64) and wrapped with an <image> tag. Files like [email protected] will be transformed with proper scale.

Custom sprite implementation

By default sprite renders when DOMContentLoaded event fires and injects as first child in document.body. If you need custom behavior, use spriteModule config option to specify module path of your sprite implementation. You can extend a default lib/web/sprite.js, or create your own. In the latter case you only need to implement the add method that accepts the symbol data as a string.

Installation

npm install svg-sprite-loader --save-dev

Example config

module.exports = {
  module: {
    loaders: [{
      test: /\.svg$/,
      loader: 'svg-sprite?' + JSON.stringify({
        name: '[name]_[hash]',
        prefixize: true,
        spriteModule: 'utils/my-custom-sprite'
      })
    }]
  }
};

Configuration

• name configures a custom symbol id naming. Default is [name]. Following name patterns are supported:
  • [ext] the extension of the image.
  • [name] the basename of the image.
  • [path] the path of the image.
  • [hash] the hash or the image content.
  • [pathhash] the hash or the image path.
• angularBaseWorkaround Adds workaround for issue with combination of <base> and History API which is typical for Angular.js. Default is false.
• prefixize isolates an image content by prefixing its id, xlink:href and url(#id) elements. Default is true.
• spriteModule defines custom sprite implementation module path.

Examples

Single image

var id = require('svg-sprite!./image.svg');
// => 'image'

Set of images

var files = require.context('svg-sprite!images/logos', false, /(twitter|facebook|youtube)\.svg$/);
files.keys().forEach(files);

Custom sprite behavior

// my-sprite.js
var Sprite = require('node_modules/svg-sprite-loader/lib/web/sprite');
module.exports = new Sprite();

// my-app.jsx
var sprite = require('my-sprite');

class MyApplication extends React.Component {
  componentWillMount() {
    sprite.elem = sprite.render(document.body);
  }

  componentWillUnmount() {
    sprite.elem.parentNode.removeChild(sprite.elem);
  }
}

Using with React

// icon.jsx
var GLYPHS = {
  PONY: require('img/pony.svg'),
  UNICORN: require('img/unicorn.svg')
};

class Icon extends React.Component {
  render() {
    var glyph = this.props.glyph;
    return (
      <svg className="icon" dangerouslySetInnerHTML={{__html: '<use xlink:href="' + glyph + '"></use>'}}/>
    )
  }
}

module.exports = Icon;
module.exports.GLYPHS = GLYPHS;

// some-component.jsx
var Icon = require('components/icon');
<Icon glyph={Icon.GLYPHS.UNICORN}>

Usage with React 0.14

// icon.jsx
export default function Icon({glyph, width = 16 , height = 16, className = 'icon'}){
  return (
    <svg className={className} width={width} height={height}>
      <use xlinkHref={glyph} />
    </svg>
  );
}

// some-component.jsx
import Icon from './icon';
import help from './images/icons/Help.svg';

<Icon glyph={help} />