⨯ src/app/[…slug]/layout.js (50:11) @ dataLayer
⨯ ReferenceError: dataLayer is not defined
⨯ ReferenceError: dataLayer is not defined
https://dev.sh20raj.com/sh20raj/add-google-analytics-to-nextjs-website-11gp
if your add like that
<script
async
src=“https://www.googletagmanager.com/gtag/js?id=G-X1234”
></script>
<script>
window.dataLayer = window.dataLayer || []; function gtag()
{dataLayer.push(arguments)}
gtag(‘js‘, new Date()); gtag(‘config‘, ‘G-X1234‘);
</script>
async
src=“https://www.googletagmanager.com/gtag/js?id=G-X1234”
></script>
<script>
window.dataLayer = window.dataLayer || []; function gtag()
{dataLayer.push(arguments)}
gtag(‘js‘, new Date()); gtag(‘config‘, ‘G-X1234‘);
</script>
Error will be shown like
⨯ src/app/[…slug]/layout.js (50:11) @ dataLayer
⨯ ReferenceError: dataLayer is not defined
at RootLayout (./src/app/[…slug]/layout.js:170:29)
48 | <script>
49 | window.dataLayer = window.dataLayer || []; function gtag()
> 50 | {dataLayer.push(arguments)}
| ^
51 | gtag(‘js‘, new Date()); gtag(‘config‘, ‘G-X1234‘);
52 | </script>
53 | <script
⨯ ReferenceError: dataLayer is not defined
at RootLayout (./src/app/[…slug]/layout.js:170:29)
48 | <script>
49 | window.dataLayer = window.dataLayer || []; function gtag()
> 50 | {dataLayer.push(arguments)}
| ^
51 | gtag(‘js‘, new Date()); gtag(‘config‘, ‘G-X1234‘);
52 | </script>
53 | <script
for Fixing it add Like ( wrap it with a {} with backticks )
<script
async
src=“https://www.googletagmanager.com/gtag/js?id=G-CWL59Y4TR7”
></script>
<script>
{`window.dataLayer = window.dataLayer || []; function gtag()
{dataLayer.push(arguments)}
gtag(‘js’, new Date()); gtag(‘config’, ‘G-CWL59Y4TR7’);`}
</script>
Additionally you can use Script and https://nextjs.org/docs/messages/next-script-for-ga
