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next.js/errors/no-document-title.md
2018-12-03 23:04:18 +01:00

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<title> should not be used in _document.js's <Head>

Why This Error Occurred

Adding <title> in pages/_document.js will lead to unexpected results with next/head since _document.js is only rendered on the initial pre-render.

Possible Ways to Fix It

Set <title> in pages/_app.js instead:

// pages/_app.js
import App, {Container} from 'next/app'
import Head from 'next/head'
import React from 'react'

export default class MyApp extends App {
  static async getInitialProps ({ Component, router, ctx }) {
    let pageProps = {}

    if (Component.getInitialProps) {
      pageProps = await Component.getInitialProps(ctx)
    }

    return { pageProps }
  }

  render () {
    const { Component, pageProps } = this.props

    return (
      <Container>
        <Head>
          <title>My new cool app</title>
        </Head>
        <Component {...pageProps} />
      </Container>
    )
  }
}