# extract-css [![Build Status](https://travis-ci.org/jonkemp/extract-css.svg?branch=master)](https://travis-ci.org/jonkemp/extract-css) [![Coverage Status](https://coveralls.io/repos/jonkemp/extract-css/badge.svg?branch=master&service=github)](https://coveralls.io/github/jonkemp/extract-css?branch=master)
[![NPM](https://nodei.co/npm/extract-css.png?downloads=true)](https://nodei.co/npm/extract-css/)
> Extract the CSS from an HTML document.
## Install
Install with [npm](https://npmjs.org/package/extract-css)
```
npm install --save extract-css
```
## Usage
```js
var extractCss = require('extract-css');
var options = {
url: './',
applyStyleTags: true,
removeStyleTags: true,
applyLinkTags: true,
removeLinkTags: true,
preserveMediaQueries: false
};
extractCss(document, options, function (err, html, css) {
console.log(html);
console.log(css);
});
```
## API
### extractCss(html, options, callback)
#### options.applyStyleTags
Type: `Boolean`
Whether to inline styles in ``.
#### options.applyLinkTags
Type: `Boolean`
Whether to resolve `` tags and inline the resulting styles.
#### options.removeStyleTags
Type: `Boolean`
Whether to remove the original `` tags after (possibly) inlining the css from them.
#### options.removeLinkTags
Type: `Boolean`
Whether to remove the original `` tags after (possibly) inlining the css from them.
#### options.url
Type: `String`
How to resolve hrefs. Required.
#### options.preserveMediaQueries
Type: `Boolean`
Preserves all media queries (and contained styles) within `` tags as a refinement when `removeStyleTags` is `true`. Other styles are removed.
#### options.codeBlocks
Type: `Object`
Default: `{ EJS: { start: '<%', end: '%>' }, HBS: { start: '{{', end: '}}' } }`
An object where each value has a `start` and `end` to specify fenced code blocks that should be ignored during parsing. For example, Handlebars (hbs) templates are `HBS: {start: '{{', end: '}}'}`. Note that `codeBlocks` is a dictionary which can contain many different code blocks, so don't do `codeBlocks: {...}` do `codeBlocks.myBlock = {...}`.
### Special markup
#### data-embed
When a data-embed attribute is present on a tag, extract-css will not inline the styles and will not remove the tags.
This can be used to embed email client support hacks that rely on css selectors into your email templates.
## Credit
The code for this module was originally taken from the [Juice](https://github.com/Automattic/juice) library.
## License
MIT © [Jonathan Kemp](http://jonkemp.com)