2017-03-15 14:23:42 +00:00
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import Document, { Head, Main, NextScript } from 'next/document'
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import Helmet from 'react-helmet'
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export default class extends Document {
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2017-04-03 04:21:26 +00:00
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static async getInitialProps (...args) {
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const documentProps = await super.getInitialProps(...args)
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2017-03-15 14:23:42 +00:00
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// see https://github.com/nfl/react-helmet#server-usage for more information
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// 'head' was occupied by 'renderPage().head', we cannot use it
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2017-07-18 06:03:21 +00:00
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return { ...documentProps, helmet: Helmet.renderStatic() }
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2017-03-15 14:23:42 +00:00
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}
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// should render on <html>
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get helmetHtmlAttrComponents () {
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return this.props.helmet.htmlAttributes.toComponent()
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}
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2017-07-18 06:03:21 +00:00
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// should render on <body>
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get helmetBodyAttrComponents () {
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return this.props.helmet.bodyAttributes.toComponent()
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}
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2017-03-15 14:23:42 +00:00
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// should render on <head>
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get helmetHeadComponents () {
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return Object.keys(this.props.helmet)
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2018-03-27 18:11:03 +00:00
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.filter(el => el !== 'htmlAttributes' && el !== 'bodyAttributes')
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.map(el => this.props.helmet[el].toComponent())
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2017-03-15 14:23:42 +00:00
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}
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get helmetJsx () {
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2018-12-17 16:34:32 +00:00
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return (
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<Helmet
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htmlAttributes={{ lang: 'en' }}
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title='Hello next.js!'
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meta={[
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{ name: 'viewport', content: 'width=device-width, initial-scale=1' },
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{ property: 'og:title', content: 'Hello next.js!' }
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]}
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/>
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)
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2017-03-15 14:23:42 +00:00
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}
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render () {
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2018-12-17 16:34:32 +00:00
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return (
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<html {...this.helmetHtmlAttrComponents}>
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<Head>
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{this.helmetJsx}
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{this.helmetHeadComponents}
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</Head>
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<body {...this.helmetBodyAttrComponents}>
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<Main />
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<NextScript />
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</body>
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</html>
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)
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2017-03-15 14:23:42 +00:00
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}
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}
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