44d1a1cb15
This PR is part of a larger effort to migrate error messages to MDX and use App Router: https://github.com/vercel/front/pull/23459
95 lines
2.8 KiB
Text
95 lines
2.8 KiB
Text
---
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title: Next Script for Google Analytics
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---
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> Prefer `next/script` component when using the inline script for Google Analytics.
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## Why This Error Occurred
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An inline script was used for Google analytics which might impact your webpage's performance.
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## Possible Ways to Fix It
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#### Using gtag.js (recommended)
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If you are using the [gtag.js](https://developers.google.com/analytics/devguides/collection/gtagjs) script to add analytics, use the `next/script` component with the right loading strategy to defer loading of the script until necessary.
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```jsx filename="pages/index.js"
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import Script from 'next/script'
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function Home() {
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return (
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<div className="container">
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<Script src="https://www.googletagmanager.com/gtag/js?id=GA_MEASUREMENT_ID" />
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<Script id="google-analytics">
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{`
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window.dataLayer = window.dataLayer || [];
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function gtag(){dataLayer.push(arguments);}
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gtag('js', new Date());
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gtag('config', 'GA_MEASUREMENT_ID');
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`}
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</Script>
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</div>
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)
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}
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export default Home
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```
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#### Using analytics.js (legacy)
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If you are using the [analytics.js](https://developers.google.com/analytics/devguides/collection/analyticsjs) script to add analytics:
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```jsx filename="pages/index.js"
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import Script from 'next/script'
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function Home() {
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return (
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<div className="container">
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<Script id="google-analytics">
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{`
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(function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
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(i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
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m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
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})(window,document,'script','https://www.google-analytics.com/analytics.js','ga');
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ga('create', 'UA-XXXXX-Y', 'auto');
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ga('send', 'pageview');
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`}
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</Script>
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</div>
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)
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}
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export default Home
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```
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If you are using the [alternative async variant](https://developers.google.com/analytics/devguides/collection/analyticsjs#alternative_async_tag):
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```jsx filename="pages/index.js"
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import Script from 'next/script'
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function Home() {
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return (
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<div className="container">
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<Script id="google-analytics">
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{`
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window.ga=window.ga||function(){(ga.q=ga.q||[]).push(arguments)};ga.l=+new Date;
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ga('create', 'UA-XXXXX-Y', 'auto');
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ga('send', 'pageview');
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`}
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</Script>
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<Script src="https://www.google-analytics.com/analytics.js" />
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</div>
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)
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}
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export default Home
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```
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## Useful Links
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- [Add analytics.js to Your Site](https://developers.google.com/analytics/devguides/collection/analyticsjs)
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- [Efficiently load third-party JavaScript](https://web.dev/efficiently-load-third-party-javascript/)
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- [next/script Documentation](/docs/pages/building-your-application/optimizing/scripts)
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