| --- | |
| title: Head | |
| description: Add custom elements to the `head` of your page with the built-in Head component. | |
| --- | |
| We expose a built-in component for appending elements to the `head` of the page: | |
| ```jsx | |
| import Head from 'next/head' | |
| function IndexPage() { | |
| return ( | |
| <div> | |
| <Head> | |
| <title>My page title</title> | |
| </Head> | |
| <p>Hello world!</p> | |
| </div> | |
| ) | |
| } | |
| export default IndexPage | |
| ``` | |
| ## Avoid duplicated tags | |
| To avoid duplicate tags in your `head` you can use the `key` property, which will make sure the tag is only rendered once, as in the following example: | |
| ```jsx | |
| import Head from 'next/head' | |
| function IndexPage() { | |
| return ( | |
| <div> | |
| <Head> | |
| <title>My page title</title> | |
| <meta property="og:title" content="My page title" key="title" /> | |
| </Head> | |
| <Head> | |
| <meta property="og:title" content="My new title" key="title" /> | |
| </Head> | |
| <p>Hello world!</p> | |
| </div> | |
| ) | |
| } | |
| export default IndexPage | |
| ``` | |
| In this case only the second `<meta property="og:title" />` is rendered. `meta` tags with duplicate `key` attributes are automatically handled. | |
| > **Good to know**: `<title>` and `<base>` tags are automatically checked for duplicates by Next.js, so using key is not necessary for these tags. | |
| > The contents of `head` get cleared upon unmounting the component, so make sure each page completely defines what it needs in `head`, without making assumptions about what other pages added. | |
| ## Use minimal nesting | |
| `title`, `meta` or any other elements (e.g. `script`) need to be contained as **direct** children of the `Head` element, | |
| or wrapped into maximum one level of `<React.Fragment>` or arrays—otherwise the tags won't be correctly picked up on client-side navigations. | |
| ## Use `next/script` for scripts | |
| We recommend using [`next/script`](/docs/pages/guides/scripts) in your component instead of manually creating a `<script>` in `next/head`. | |
| ## No `html` or `body` tags | |
| You **cannot** use `<Head>` to set attributes on `<html>` or `<body>` tags. This will result in an `next-head-count is missing` error. `next/head` can only handle tags inside the HTML `<head>` tag. | |