WIP - add extractor, generate snippet_data

node_modules/srcset/readme.md

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+# srcset [![Build Status](https://travis-ci.org/sindresorhus/srcset.svg?branch=master)](https://travis-ci.org/sindresorhus/srcset)
+
+> Parse and stringify the HTML `<img>` [srcset](http://mobile.smashingmagazine.com/2013/08/21/webkit-implements-srcset-and-why-its-a-good-thing/) attribute.
+
+Useful if you're creating a polyfill, build-tool, etc.
+
+
+## Install
+
+```
+$ npm install --save srcset
+```
+
+
+## Usage
+
+How an image with `srcset` might look like:
+
+```html
+<img alt="The Breakfast Combo"
+     src="banner.jpg"
+     srcset="banner-HD.jpg 2x, banner-phone.jpg 100w, banner-phone-HD.jpg 100w 2x">
+```
+
+Then have some fun with it:
+
+```js
+var srcset = require('srcset');
+
+var parsed = srcset.parse('banner-HD.jpg 2x, banner-phone.jpg 100w');
+console.log(parsed);
+/*
+[
+	{ url: 'banner-HD.jpg', density: 2 },
+	{ url: 'banner-phone.jpg', width: 100 }
+]
+*/
+
+parsed.push({ url: 'banner-phone-HD.jpg', width: 100, density: 2 });
+
+var stringified = srcset.stringify(parsed);
+console.log(stringified);
+/*
+banner-HD.jpg 2x, banner-phone.jpg 100w, banner-phone-HD.jpg 100w 2x
+*/
+```
+
+
+## API
+
+### .parse()
+
+Accepts a srcset string and returns an array of objects with the possible properties: `url` (always), `width`, `height`, `density`.
+
+### .stringify()
+
+Accepts an array of objects with the possible properties: `url` (required), `width`, `height`, `density` and returns a srcset string.
+
+
+## License
+
+MIT © [Sindre Sorhus](http://sindresorhus.com)