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next.js/server/document.js

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import React, { Component, PropTypes } from 'react'
import htmlescape from 'htmlescape'
import flush from 'styled-jsx/server'
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export default class Document extends Component {
static getInitialProps ({ renderPage }) {
const {html, head} = renderPage()
const styles = flush()
return { html, head, styles }
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}
static childContextTypes = {
_documentProps: PropTypes.any
}
getChildContext () {
return { _documentProps: this.props }
}
render () {
return <html>
<Head />
<body>
<Main />
<NextScript />
</body>
</html>
}
}
export class Head extends Component {
static contextTypes = {
_documentProps: PropTypes.any
}
render () {
const { head, styles } = this.context._documentProps
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return <head>
{(head || []).map((h, i) => React.cloneElement(h, { key: i }))}
{styles || null}
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{this.props.children}
</head>
}
}
export class Main extends Component {
static contextTypes = {
_documentProps: PropTypes.any
}
render () {
const { html } = this.context._documentProps
return <div id='__next' dangerouslySetInnerHTML={{ __html: html }} />
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}
}
export class NextScript extends Component {
static contextTypes = {
_documentProps: PropTypes.any
}
getChunkScript (filename) {
const { __NEXT_DATA__ } = this.context._documentProps
let { buildStats } = __NEXT_DATA__
const hash = buildStats ? buildStats[filename].hash : '-'
return (
<script type='text/javascript' src={`/_next/${hash}/${filename}`} defer />
)
}
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render () {
const { staticMarkup, __NEXT_DATA__ } = this.context._documentProps
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return <div>
{staticMarkup ? null : <script dangerouslySetInnerHTML={{
__html: `__NEXT_DATA__ = ${htmlescape(__NEXT_DATA__)}; module={};`
}} />}
{ staticMarkup ? null : this.getChunkScript('commons.js') }
{ staticMarkup ? null : this.getChunkScript('main.js') }
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</div>
}
}