Adding google analytics to modern sharepoint site using SPFX Extension

hi,

We have a requirement to add Google Analytics to Sharepoint Online modern site - not to Site Collection

I followed below tutorial, but when i build it, i get the following error on  eval(` line of code.

https://sharepoint.handsontek.net/2017/12/21/how-to-add-google-analytics-to-the-modern-sharepoint/

eval(`
			window.dataLayer = window.dataLayer || [];
			function gtag(){dataLayer.push(arguments);}
			gtag('js', new Date());    
			gtag('config',  '${trackingID}');
		`);

Can any one recommend, how to either fix the above error, or some other way, to incorporate GA4 to Sharepoint site please?
Thank you