svg-react-loader

A Webpack Loader to turn SVGs into React Components

Summary

A webpack loader allowing for inline usage of a SVG as a React component, or for composing individual SVGs into larger ones.
The latest version has been refactored to allow for receiving an SVG/XML string or an JSON object-tree representing an SVG. This allows for other loaders before svg-react to alter/update/remove nodes before reaching svg-react.
In addition, the new filters API allows for additional ways to modify the generated SVG Component. This allows svg-react to also be used as a pre-loader (with filters and raw=true params) for modifying SVGs before they are acted on by the loader version of svg-react.

Notes

As of version 0.4.0, svg-react-loader no longer requires babel to transpile the generated code. Everything is returned as an ES5-7 compatible module, and the component is just a function. With that, it only works with React@>=0.14

Installation

~ % npm install --save-dev svg-react-loader ~

Usage

ES6+ (Assuming a babel-loader is used on /\.jsx?$/ files):
~js import React, { Component } from 'react'; import Icon from 'svg-react-loader?name=Icon!../svg/my-icon.svg';
export default class MyIcon extends Component {

render () {
    return <Icon className='normal' />;
}

}; ~
ES5
~js var React = require('react'); var Icon = require('svg-react-loader?name=Icon!../svg/my-icon.svg');
module.exports = React.createClass({

render () {
    return React.createElement(Icon, { className: 'normal' });
}

}); ~

Documentation

Query Params

Query params can be used on the loader path, or on the resource's path. Those on the resource will override those given for the loader.

• name: displayName to use for the compiled component. Defaults to using the

resource's file name, capitalized and camelCased. ex. "?name=MyIcon"

• tag: Override the root-level tag name.

• props: Attributes to apply to the root-level tag. If a certain attribute is

already assigned to the tag, the value here will override that.

• attrs: Alias for props

• filters: If given on the query string, it is a list of module names, or

filepaths, to load as filter functions. If given in the webpack config as a svgReactLoader.filters, or as query.filters for the loader configuration object, it is an array of functions.

• classIdPrefix: A string to prefix all class or id selectors in found style

blocks, or within className properties, with. If indicated without a string, the file's basename will be used as a prefix.

• raw: If set to true will output the parsed object tree repesenting the SVG

as a JSON string. Otherwise, returns a string of JavaScript that represents the component's module.

• propsMap: If given on the query string, it is an array of colon separated

propname:translatedname pairs. If given in the webpack configuration as svgReactLoader.propsMap, or in an object query for the loader configuration, is a simple object of propname: 'translatedname'

• xmlnsTest: A regular expression used to remove non-supported xmlns

attributes. Default is /^xmlns(Xlink)?$/

• titleCaseDelim: A regular expression used to generate component's name. It

would be ignore if name was set. Default is /[._-]/

Examples

Webpack 1

~js // webpack configuration module: {

loaders: [
    {
        test: /\.svg$/,
        exclude: /node_modules/,
        loader: 'svg-react-loader',
        query: {
            classIdPrefix: '[name]-[hash:8]__',
            filters: [
                function (value) {
                    // ...
                    this.update(newvalue);
                }
            ],
            propsMap: {
                fillRule: 'fill-rule',
                foo: 'bar'
            },
            xmlnsTest: /^xmlns.*$/
        }
    }
]

}
// Resource paths import MyIcon from 'svg-react-loader?name=MyIcon!../svg/icon.svg'; import MyIcon from 'svg-react-loader?tag=symbol!../svg/icon.svg'; import MyIcon from 'svg-react-loader?tag=symbol&props=id:my-icon?../svg/icon.svg'; import MyIcon from 'svg-react-loader?filters=./my-filter.js!../svg/icon.svg'; ~

Webpack 2-3

~js // webpack configuration module: {

loaders: [
    {
        test: /\.svg$/,
        exclude: /node_modules/,
        use: {
            loader: 'svg-react-loader',
            options: {
                tag: 'symbol',
                attrs: {
                    title: 'example',
                },
                name: 'MyIcon',
            },
        },
    }
]

}
// Resource paths import MyIcon from '../svg/icon.svg'; ~

Object Tree API

Internally, svg-react-loader converts the given SVG/XML into an object tree that looks something like:
~js {

"tagname": "svg",
"props": {
    "xmlns": "http://www.w3.org/2000/svg",
    "xmlns:xlink": "http://www.w3.org/1999/xlink",
    "viewBox": "0 0 16 16",
    "enable-background": "new 0 0 16 16",
    "xml:space": "preserve"
},
"children": [
    {
        "tagname": "rect",
        "props": {
            "x": "0",
            "y": "0",
            "width": "16",
            "height": "16",
            "fill": "#fff"
        }
    },
    {
        "tagname": "text",
        "children": ["Foobar"]
    }
]

} ~
It then uses a variety of filters to modify the tree to conform to how React expects to see props, styles, etc...
If svg-react-loader receives a JSON string instead of string of SVG/XML, it expects to receive it in the above format (i.e.: objects with properties 'tagname', 'props', and 'children'). Children is always an array (unless empty), and children can be objects with the mentioned props, or a plain string (for text nodes).

Filters

A filter is just a function that accepts one value, and it has the same this context as the traverse API.
svg-react-loader is really just a series of filters applied to a parsed SVG/XML, or JSON, string and then regenerated as a string to form a React functional component.
Review lib/sanitize/filters for some examples.

Report an Issue

• Bugs
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License

MIT