[reactjs] Detect Route Change with react-router

This is an old question and I don't quite understand the business need of listening for route changes to push a route change; seems roundabout.

BUT if you ended up here because all you wanted was to update the 'page_path' on a react-router route change for google analytics / global site tag / something similar, here's a hook you can now use. I wrote it based on the accepted answer:

useTracking.js

import { useEffect } from 'react'
import { useHistory } from 'react-router-dom'

export const useTracking = (trackingId) => {
  const { listen } = useHistory()

  useEffect(() => {
    const unlisten = listen((location) => {
      // if you pasted the google snippet on your index.html
      // you've declared this function in the global
      if (!window.gtag) return

      window.gtag('config', trackingId, { page_path: location.pathname })
    })

    // remember, hooks that add listeners
    // should have cleanup to remove them
    return unlisten
  }, [trackingId, listen])
}

You should use this hook once in your app, somewhere near the top but still inside a router. I have it on an App.js that looks like this:

App.js

import * as React from 'react'
import { BrowserRouter, Route, Switch } from 'react-router-dom'

import Home from './Home/Home'
import About from './About/About'
// this is the file above
import { useTracking } from './useTracking'

export const App = () => {
  useTracking('UA-USE-YOURS-HERE')

  return (
    <Switch>
      <Route path="/about">
        <About />
      </Route>
      <Route path="/">
        <Home />
      </Route>
    </Switch>
  )
}

// I find it handy to have a named export of the App
// and then the default export which wraps it with
// all the providers I need.
// Mostly for testing purposes, but in this case,
// it allows us to use the hook above,
// since you may only use it when inside a Router
export default () => (
  <BrowserRouter>
    <App />
  </BrowserRouter>
)

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