sheetify

Modular CSS bundler for browserify. Works with npm modules like browserify does.

Features

clarity: namespace CSS, no more need for naming schemes
modularity: import and reuse CSS packages from npm
extensibility: transform CSS using existing plugins, or write your own
transparency: inline CSS in your views
simplicity: tiny API surface and a minimal code base

Example

Given some inline CSS:

const css = require('sheetify')
const html = require('bel')

const prefix = css`
  :host > h1 {
    text-align: center;
  }
`

const tree = html`
  <section class=${prefix}>
    <h1>My beautiful, centered title</h1>
  </section>
`

document.body.appendChild(tree)

Compile with browserify using -t sheetify/transform:

$ browserify -t sheetify/transform index.js > bundle.js

CSS classes are namespaced based on the content hash:

._60ed23ec9f h1 {
  text-align: center;
}

And the rendered HTML includes the namespace:

<section class="_60ed23ec9f">
  <h1>My beautiful, centered title</h1>
</section>

Styling host elements

The element that gets a prefix applied can be styled using the :host pseudoselector:

const css = require('sheetify')
const html = require('bel')

const prefix = css`
  :host {
    background-color: blue;
  }

  :host > h1 {
    text-decoration: underline;
  }
`

const tree = html`
  <section class=${prefix}>
    <h1>My beautiful, centered title</h1>
  </section>
`

document.body.appendChild(tree)

By using :host we are able to provide styles for the parent element:

._60ed23ec9f {
  background-color: blue;
}

._60ed23ec9f > h1 {
  text-decoration: underline;
}

<section class="_60ed23ec9f">
  <h1>My beautiful, centered title</h1>
</style>

External files

To include an external CSS file you can pass a path to sheetify as sheetify('./my-file.css'):

const css = require('sheetify')
const html = require('bel')

const prefix = css('./my-styles.css')

const tree = html`
  <section class=${prefix}>
    <h1>My beautiful, centered title</h1>
  </section>
`

document.body.appendChild(tree)

Use npm packages

To consume a package from npm that has .css file in its main or style field:

const css = require('sheetify')

css('normalize.css')

Packages from npm will not be namespaced by default.

Write to separate file on disk

To write the compiled CSS to a separate file, rather than keep it in the bundle use css-extract:

$ browserify index.js \
  -t [ sheetify/transform ] \
  -p [ css-extract -o bundle.css ] index.js \
  -o bundle.js

css-extract can also write to a stream from the JS api, look at the documentation to see how.

Plugins

Sheetify uses plugins that take CSS and apply a transform. For example include sheetify-cssnext to support autoprefixing, variables and more:

const css = require('sheetify')
const html = require('bel')

const prefix = css`
  h1 {
    transform: translate(0, 0);
  }
`

const tree = html`
  <section class=${prefix}>
    <h1>My beautiful, centered title</h1>
  </section>
`

document.body.appendChild(tree)

Compile with browserify using -t [ sheetify/transform -u sheetify-cssnext ]:

$ browserify -t [ sheetify/transform -u sheetify-cssnext ] index.js > bundle.js

Transforms the CSS into:

h1 {
  -webkit-transform: translate(0, 0);
          transform: translate(0, 0);
}

The following plugins are available:

sheetify-cssnext - use tomorrow's CSS syntax today

API

Browserify transforms accept either flags from the command line using subargs:

$ browserify -t [ sheetify/transform -u sheetify-cssnext ] index.js > bundle.js

Or the equivalent options by passing in a configuration object in the JavaScript API:

const browserify = require('browserify')

const b = browserify(path.join(__dirname, 'transform/source.js'))
b.transform('sheetify/transform', { use: [ 'sheetify-cssnext' ] })
b.bundle().pipe(process.stdout)

The following options are available:

Options:
  -u, --use    Consume a sheetify plugin

FAQ

Help, why isn't my inline CSS being transformed?

Well, that might be because you're running babelify before running sheetify. sheetify looks for template strings in your code and then transforms them as inline stylesheets. If these are caught and transformed to ES5 strings by babelify then sheetify ends up sad. So try running sheetify before babelify and you should be good, we hope.

Installation

$ npm install sheetify

License

MIT

jakeburden / sheetify