Download the example or clone the repo:

curl https://codeload.github.com/zeit/next.js/tar.gz/master | tar -xz --strip=2 next.js-master/examples/with-react-ga
cd with-react-ga

Install it and run:

npm install
npm run dev

Deploy it to the cloud with now (download)

now

This example shows the most basic way to use react-ga using <Layout/> component with NextJs. You can also use an HOC instead of <Layout/> component. Modify Tracking ID in utils/analytics.js file for testing this example.