How should I register html for the <head> in the app router? In the pages router I'd use
<Head>
<meta property="og:title" content="My new title" key="title" />
</Head>
#<Head> in app router
arctic dagger
muted slateBOT
Hi @arctic dagger. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave:
In the app directory of Next.js, you can manage the <head> HTML elements such as title and meta using the Metadata APIs. Instead of using the next/head component as you would in the pages directory, you would define metadata by exporting a metadata object in a layout.js or page.js file.
Here's an example of how you can define metadata in the app directory:
import { Metadata } from 'next'
export const metadata: Metadata = {
title: 'Next.js',
}
export default function Page() {
return '...'
}
In your case, you can set the og:title property in the metadata object like this:
import { Metadata } from 'next'
export const metadata: Metadata = {
'og:title': 'My new title',
}
export default function Page() {
return '...'
}
Remember, you should not manually add <head> tags such as <title> and <meta> to root layouts. Instead, use the Metadata API which automatically handles advanced requirements such as streaming and de-duplicating <head> elements.
For more information, you can refer to the Next.js documentation on Metadata (https://nextjs.org/docs/app/building-your-application/routing/pages-and-layouts#metadata) and the API reference for generateMetadata (https://nextjs.org/docs/app/api-reference/functions/generate-metadata).
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arctic dagger
@muted slate what if i need to register
<link
rel="preload"
as="image"
imagesrcset="/_next/image?url=%2Fimg.jpg&w=828&q=75 1x, /_next/image?url=%2Fimg.jpg&w=1920&q=75 2x"
fetchPriority="high"
/>
Let me check the knowledge base for you. One moment! :books:
I'm sorry, but the provided extracts do not contain information on how to register a link element with rel="preload" for an image in the app router of Next.js.
However, in general, you can use the next/head component to add elements to the head of your document. Here's an example:
import Head from 'next/head'
export default function Page() {
return (
<>
<Head>
<link
rel="preload"
as="image"
imagesrcset="/_next/image?url=%2Fimg.jpg&w=828&q=75 1x, /_next/image?url=%2Fimg.jpg&w=1920&q=75 2x"
fetchPriority="high"
/>
</Head>
// rest of your component
</>
)
}
Please refer to the official Next.js documentation or other reliable sources for more accurate information.
Note: you can ask me a follow up question by @ mentioning me again :speech_balloon:
arctic dagger
@muted slate but how do i do that in the app router
muted slateBOT
Let me check the knowledge base for you. One moment! :books:
In the app directory of Next.js, you can use the new ReactDOM methods to insert resource hints like preload into the <head> of the document. However, the provided extracts do not contain specific information on how to use these methods for images.
Here's an example of how you can use these methods for general resources:
'use client'
import ReactDOM from 'react-dom'
export function PreloadResources() {
ReactDOM.preload('...', { as: '...' })
return null
}
In this example, the ReactDOM.preload method is used to start loading a resource early in the page rendering lifecycle. The href argument is the URL of the resource, and the as option is the type of the resource.
Please note that this is a general example and may not work for your specific use case. For more accurate information, please refer to the Next.js documentation on Resource hints (https://nextjs.org/docs/app/api-reference/functions/generate-metadata#resource-hints) and the ReactDOM methods PR (https://github.com/facebook/react/pull/26237).
Note: you can ask me a follow up question by @ mentioning me again :speech_balloon:
arctic dagger
@muted slate how do i register abritrary html in <head> using the app router
muted slateBOT
Let me check the knowledge base for you. One moment! :books:
In the app directory of Next.js, you can use the useServerInsertedHTML hook to insert arbitrary HTML into the <head> of the document. However, the provided extracts do not contain specific information on how to use this hook for arbitrary HTML.
Here's an example of how you can use this hook for styled-components:
'use client'
import React, { useState } from 'react'
import { useServerInsertedHTML } from 'next/navigation'
import { ServerStyleSheet, StyleSheetManager } from 'styled-components'
export default function StyledComponentsRegistry({
children,
}: {
children: React.ReactNode
}) {
// Only create stylesheet once with lazy initial state
// x-ref: <https://reactjs.org/docs/hooks-reference.html#lazy-initial-state>
const [styledComponentsStyleSheet] = useState(() => new ServerStyleSheet())
useServerInsertedHTML(() => {
const styles = styledComponentsStyleSheet.getStyleElement()
styledComponentsStyleSheet.instance.clearTag()
return <>{styles}</>
})
if (typeof window !== 'undefined') return <>{children}</>
return (
<StyleSheetManager sheet={styledComponentsStyleSheet.instance}>
{children}
</StyleSheetManager>
)
}
In this example, the useServerInsertedHTML hook is used to collect all CSS style rules generated during a render and inject the styles collected in the registry into the <head> HTML tag in the root layout.
Please note that this is a general example and may not work for your specific use case. For more accurate information, please refer to the Next.js documentation on CSS-in-JS (https://nextjs.org/docs/app/building-your-application/styling/css-in-js#styled-components) and other reliable sources.
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arctic dagger
@muted slate this isn't for stylesheets, just arbitary html for the head
muted slateBOT
Let me check the knowledge base for you. One moment! :books:
I'm sorry for the confusion, but the provided extracts do not contain specific information on how to insert arbitrary HTML into the <head> of the document in the app directory of Next.js.
The new App Router in Next.js provides built-in SEO support and resource hints, but it doesn't seem to provide a direct way to insert arbitrary HTML into the <head> like you would do with next/head in the pages directory.