export default Box
`

$3

`js
const className = cxs({
color: 'tomato',
':hover': {
color: 'black'
}
})
`

$3

`js
const className = cxs({
fontSize: '32px',
'@media screen and (min-width: 40em)': {
fontSize: '48px'
}
})
`

$3

`js
const className = cxs({
color: 'black',
' > a': {
color: 'tomato'
}
})
`

$3

For Node.js environments, use the css() method to return the static CSS string after rendering a view.

`js
import React from 'react'
import ReactDOMServer from 'react-dom/server'
import cxs from 'cxs'
import App from './App'

const html = ReactDOMServer.renderToString()
const css = cxs.css()

const doc =

${html}

// Reset the cache for the next render
cxs.reset()
`

Note: cxs does not currently have a mechanism for rehydrating styles on the client, so use with caution in universal JavaScript applications.

React Components

cxs also has an alternative higher order component API for creating styled React components, similar to the [styled-components][sc] API.

`js
import cxs from 'cxs/component'

const Heading = cxs('h1')({
margin: 0,
fontSize: '32px',
lineHeight: 1.25
})
`

$3

To extend a cxs component, pass it to the component creator function.

`js
const Button = cxs('button')({
color: 'white',
backgroundColor: 'blue'
})

const TomatoButton = cxs(Button)({
backgroundColor: 'tomato'
})
`

$3

Any component can be passed to cxs to add styles.

`js
import { Link } from 'react-router'

const MyLink = cxs(Link)({
color: 'tomato'
})
`

Note: components must accept className as a prop to work with cxs.

$3

cxs components can also handle dynamic styling based on props by passing a function as an argument

`js
const Heading = cxs('h1')(props => ({
color: props.color
}))
`

#### Removing style props

To remove style props from the rendered HTML element,
use the [prop-types][pt] package to define propTypes on a component.
cxs/component will remove any prop that matches a key from the propTypes object.

`js
import cxs from 'cxs/component'
import PropTypes from 'prop-types'

const Heading = cxs('h2')(props => ({
fontSize: props.big ? '48px' : '32px'
}))

Heading.propTypes = {
big: PropTypes.bool
}
`

$3

Style utility functions, like those in [styled-system][s2], can be used with cxs/component.

`js
import cxs from 'cxs/component'
import {
space,
color
} from 'styled-system'

const Heading = cxs('h2')(space, color)
`

$3

Theming is supported with the component.

`jsx
import React from 'react'
import ThemeProvider from 'cxs/ThemeProvider'
import theme from './theme'

const App = props => (


Hello


)
`

`jsx
import cxs from 'cxs/component'

const Heading = cxs('h2')(props => ({
fontSize: props.theme.fontSizes[4] + 'px',
color: props.theme.blue
}))
``

API

$3

Accepts styles objects or functions that return style objects and returns a className string.

$3

Returns the rendered CSS string for static and server-side rendering.

$3

Resets the cache for server-side rendering

$3

A [styled-components][sc]-like API for creating React components with cxs.

---

$3

cxs does not handle vendor prefixing to keep the module size at a minimum.

$3

For previous versions of cxs, see the [v3 branch][v3] or [v4 branch][v4]

[sc]: https://www.styled-components.com (styled-components)
[pt]: https://www.npmjs.com/package/prop-types

[s2]: https://github.com/jxnblk/styled-system
[v3]: https://github.com/jxnblk/cxs/tree/v3
[v4]: https://github.com/jxnblk/cxs/tree/v4

MIT License