2023-07-05 15:11:16 +02:00
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---
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title: No Duplicate Head
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---
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2021-07-15 20:04:17 +02:00
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2022-06-14 04:17:42 +02:00
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> Prevent duplicate usage of `<Head>` in `pages/_document.js`.
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2023-07-05 15:11:16 +02:00
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## Why This Error Occurred
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2021-07-15 20:04:17 +02:00
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More than a single instance of the `<Head />` component was used in a single custom document. This can cause unexpected behavior in your application.
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2023-07-05 15:11:16 +02:00
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## Possible Ways to Fix It
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2021-07-15 20:04:17 +02:00
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Only use a single `<Head />` component in your custom document in `pages/_document.js`.
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2023-07-05 15:11:16 +02:00
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```jsx filename="pages/_document.js"
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2021-07-15 20:04:17 +02:00
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import Document, { Html, Head, Main, NextScript } from 'next/document'
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class MyDocument extends Document {
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static async getInitialProps(ctx) {
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//...
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}
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render() {
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return (
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<Html>
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<Head />
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<body>
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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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}
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}
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export default MyDocument
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```
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2023-07-05 15:11:16 +02:00
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## Useful Links
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2021-07-15 20:04:17 +02:00
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2023-07-05 15:11:16 +02:00
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- [Custom Document](/docs/pages/building-your-application/routing/custom-document)
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