How to use google analytics with next.js app?
I'm using styled-components with next.js so my styles need to be server-side rendered, hence how can I add google analytics to my website?
I checked next.js google analytics example but as I said my _document file is different because of using styled-components.
// _document.js
import React from 'react'
import Document from 'next/document'
import { ServerStyleSheet } from 'styled-components'
class MyDocument extends Document {
static async getInitialProps(ctx) {
const sheet = new ServerStyleSheet()
const originalRenderPage = ctx.renderPage
try {
ctx.renderPage = () => originalRenderPage({
enhanceApp: (App) => (props) => sheet.collectStyles(<App {...props} />),
})
const initialProps = await Document.getInitialProps(ctx)
return {
...initialProps,
styles: (
<>
{initialProps.styles}
{sheet.getStyleElement()}
</>
),
}
} finally {
sheet.seal()
}
}
}
export default MyDocument
Answer
The accepted answer didn't work for me. Copying the full tracking code within dangerouslySetInnerHTML results in Unexpected token <.
Instead, do the following in _document.js or wherever you defined Head:
<Head>
<script
async
src="https://www.googletagmanager.com/gtag/js?id=[Tracking ID]"
/>
<script
dangerouslySetInnerHTML={{
__html: `
window.dataLayer = window.dataLayer || [];
function gtag(){dataLayer.push(arguments);}
gtag('js', new Date());
gtag('config', '[Tracking ID]');
`,
}}
/>
</Head>
See also: