How to use Google Analytics with React?

Question

In my react app I have some pages:

1. Main
2. Service
3. Contact
4. Profile (private)
5. etc..

I need to track users activity with Google Analytics. I googled react-ga and it's just fine. But with this library I have to initialize my GA on every route I use. For example:

Route "/" - main page:

class Main extends Component {

    componentDidMount() {
        initGA();
    }

    render() {
        return (
            <div>
                <Component1 />
                <Component2 />
            </div>
        )
    }
}

My initGA() looks like:

import ReactGA from 'react-ga';

export const initGA = () => {
    ReactGA.initialize('UA-00000000-1');
    ReactGA.pageview(window.location.pathname + window.location.search);
    console.log(window.location.pathname + window.location.search);
}

My App class looks like:

class App extends Component {
    render() {
        return (
            <BrowserRouter>
                <div className="App">

                    <Switch>
                        <Route exact path="/" component={Main} />
                        <Route exact path="/signup" component={SignupLayout} />
                        <Route component={PublicLayout} />
                    </Switch>

                </div>
            </BrowserRouter>
        );
    }
}

In my way of using react-ga I'm adding initGA() function on every component which renders on route response. I think it is not right to duplicate initGA() in every component. Please, guys, how do you use react-ga? What is right way to use react-ga?

Answer 1

This is the way to do it with hooks.

App.js

import React, { useEffect } from 'react'
import { Router, Route } from 'react-router-dom'
import { createBrowserHistory } from 'history'
import ReactGA from 'react-ga'

ReactGA.initialize(process.env.REACT_APP_GA_TRACKING_NO)
const browserHistory = createBrowserHistory()
browserHistory.listen((location, action) => {
  ReactGA.pageview(location.pathname + location.search)
})

const App = () => {
  useEffect(() => {
    ReactGA.pageview(window.location.pathname + window.location.search)
  }, [])

  return <div>Test</div>
}

The answer above with the class components is almost fine, but you won't get to see the first page load in the analytics. The history.listen will fire only when the route changes. This doesn't happen when you first load the page. To fix this, I added a useEffect a hook in the App component. If the user reloads the site, the App will be always rerendered. ReactGA.pageview(window.location.pathname + window.location.search) makes sure that we attribute the reload to the correct route if the route is something else than '/'.