React-ga: window is not defined error

[achhranitesh]

Hi,

I am creating an React App using Next JS for SSR. So when added the ReactGA.initialize event is head tag for _document.js. It is throwing an error for 'window is not defined'.

A quick and prompt solution would be helpful

[DveMac]

Can you check that window exists before calling initialize().

if (typeof window !== 'undefined') {
  ReactGA.initialize()
}

[romanown]

I have the same problem. but in that case GA will not be initialized and will not work?

[DveMac]

You most probably don't want it initializing on the server anyway. It should initialize only when the code is run on the client