External SVG Sprite

A loader and plugin for webpack that converts all your SVGs into symbols and merges them into a SVG sprite.

Requirements

You will need NodeJS v6+, npm v3+ and webpack 2.

To make it work in older browsers, like Internet Explorer, you will also need SVG for Everybody or svgxuse.

Installation

npm i external-svg-sprite-loader

Options

Loader options

• name - relative path to the sprite file (default: img/sprite.svg). The [hash] placeholder is supported.
• iconName - name for the icon symbol (default: icon-[name]-[hash:5]).
• svgoOptions - custom options to be passed to svgo.

Plugin options

• emit - determines if the sprite is supposed to be emitted (default: true). Useful when generating server rendering bundles where you just need the SVG sprite URLs but not the sprite itself.

Usage

If you have the following webpack configuration:

// webpack.config.js

import path from 'path';
import SvgStorePlugin from 'external-svg-sprite-loader/lib/SvgStorePlugin';

module.exports = {
    module: {
        rules: [
            {
                loader: 'external-svg-sprite-loader',
                test: /\.svg$/,
            },
        ],
    },
    output: {
        path: path.resolve(__dirname, 'public'),
        publicPath: '/',
    },
    plugins: [
        new SvgStorePlugin(),
    ],
};

You will be able to import your SVG files in your JavaScript files as shown below. The imported SVG will always correspond to a JavaScript object with keys symbol, view and viewBox:

• The symbol url can be used on a <use> tag to display the icon;
• The view url is supposed to be used in CSS;
• The viewBox value is required by some browsers on the <svg> tag.

The URLs will have the following format:

• symbol: webpackConfig.output.publicPath/loader.name#loader.prefix-your-svg-file-name-icon-file-hash
• view: webpackConfig.output.publicPath/loader.name#view-loader.prefix-your-svg-file-name-icon-file-hash

/*
 * {
 *  symbol: '/public/img/sprite.svg#icon-logo',
 *  view: '/public/img/sprite.svg#view-icon-logo',
 *  viewBox: '0 0 150 100'
 * }
 */
import logo from './images/logo.svg';

class {

    render() {
        return (
            <svg viewBox={logo.viewBox}>
                <use xlinkHref={logo.symbol} />
            </svg>
        );
    }
    
}

In CSS files, you can import your SVG files as shown bellow (assuming you are using the ExtractTextPlugin). The imported value will be converted into the view url shown above.

.special-icon {
    /* the url will be replaced with the url to the sprite */
    background-image: url('./icons/special.svg') no-repeat 0; 
}

Examples

You can find working examples in the examples folder. To test them under the example folder run:

npm install

npm start

And then you can see the result in http://localhost:3000.

Contributing

First of all, thank you for contributing, you are awesome.

Here are a few rules to follow in order to ease code reviews, and discussions before maintainers accept and merge your work:

• Make sure your commit messages make sense (don't use fix tests, small improvement, fix 2, among others).
• Before creating a pull request make sure of the following:
  • your code is all documented properly;
  • your code passes the ESLint rules;
  • variable, function and class names are explanatory enough;
  • code is written in ES2015.
• When creating a pull request give it a name and description that are explanatory enough. In the description detail everything you are adding, do not assume we will understand it from the code.

Thank you!

License

MIT (http://www.opensource.org/licenses/mit-license.php)