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I'm developing my website with Next.js To upgrade my website's SEO performance, I'm trying to avoid duplicated meta tags.
My Question
In Next official docs, they say that I can avoid overlapped meta tag by insert key property in meta tag. But this does not work.
<meta name="description" content="~~" key="titleDescription"/>
<meta name="keywords" content="~~" key="titleKeywords"/>
These are default rootDocument meta tags and,
<meta name="description" content={item.product_description} key="titleDescription"></meta>
<meta name="keywords" content={item.brand_name} key="titleKeywords"></meta>
These are dynamically generated meta tags in item pages.
In deployed browser, there are still two description and keywords meta tags in website. I want to avoid duplicated meta tag. Thank you for your help!
712
There are a few things to watch for when using Next.js Head components.
_document Head component is next/document
_document will not be replaced (can be duplicated) even with a key identifier_app Head component is next/head
_app can be in child components_app can be overridden with the key identifierkey identifier.Scripts, styles, and other tags you need access to immediately - Next will likely not be fully mounted at this point. You cannot replace tags in the document/head component with the key attribute.
import Document, {Head, Html, Main, NextScript } from 'next/document';
class MyDocument extends Document {
render = () => (
<Html lang="en-US" dir="ltr">
<Head>
<script src="/some-script.js" defer={false} />
<style>.inline-styles{}</style>
{/* META & TITLE TAGS PLACED HERE CANNOT BE OVERRODE */}
</Head>
<Head />
<body>
<Main />
<NextScript />
</body>
</Html>
);
}
OR self-closing Head tag
class MyDocument extends Document {
render = () => (
<Html>
<Head />
<body>
<Main />
<NextScript />
</body>
</Html>
);
}
Note: import is from next/document
import Head from 'next/head';
const App = ({ Component, pageProps }) => (
<>
<Head>
<title key="title">App Tittle</title>
</Head>
<Component {...pageProps} />
</>
);
OR load from a custom component
import Head from 'next/head';
const MyHeadTags = () => (
<Head>
<title key="title">App Tittle</title>
<meta key="description" name="description">Description</meta>
</Head>
);
const App = ({ Component, pageProps }) => (
<>
<MyHeadTags />
<Component {...pageProps} />
</>
);
Note: import is from next/head
const SomePage = () => (
<>
<Head>
<title key="title">Some Page Tittle</title>
<meta key="description" name="description">Some Page Description</meta>
</Head>
<div>My Page</div>
</>
);
The head component must be on the page and cannot be a child component. If it's a child component, it sometimes will not override other tags with the same key property.
const MyHeadTags = () => (
<Head>
<title key="title">Some Page</title>
<meta key="description" name="description">Some Page Description</meta>
</Head>
);
const ChildComponent = () => (
<>
<MyHeadTags />
Info.
</>
);
const SomePage= () => (
<>
<ChildComponent />
<div>Will not work</div>
</>
);
Update: The last example seems to work in some cases with Next 11+, but I have run into a few instances where it duplicates tags. I avoid the last method.
58
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