Matomo Next

Matomo analytics for Next.js applications

• Basic SPA Matomo setup
• Will track next/router route changes routeChangeComplete event

Usage

Add the init call in your _app.js :

import React, { useEffect } from "react";
import App from "next/app";

import { init } from "@socialgouv/matomo-next";

const MATOMO_URL = process.env.NEXT_PUBLIC_MATOMO_URL;
const MATOMO_SITE_ID = process.env.NEXT_PUBLIC_MATOMO_SITE_ID;

function MyApp({ Component, pageProps }) {
  useEffect(() => {
    init({ url: MATOMO_URL, siteId: MATOMO_SITE_ID });
  }, []);

  return <Component {...pageProps} />;
}

export default MyApp;

Will track routes changes by default.

Exclude tracking some routes :

This wont track /login.php or any url containing ?token=.

init({
  url: MATOMO_URL,
  siteId: MATOMO_SITE_ID,
  excludeUrlsPatterns: [/^\/login.php/, /\?token=.+/],
});

Track additional events :

import { push } from "@socialgouv/matomo-next";

// track some events
push(["trackEvent", "contact", "click phone"]);

Extensibility

The function has three optional callback properties that allow for custom behavior to be added:

• onRouteChangeStart(path: string) => void: This callback is triggered when the route is about to change with Next Router event routeChangeStart. It receives the new path as a parameter.

• onRouteChangeComplete: This callback is triggered when the route change is complete with Next Router event routeChangeComplete. It receives the new path as a parameter.

• onInitialization: This callback is triggered when the function is first initialized. It does not receive any parameters. It could be useful to use it if you want to add parameter to Matomo when the page is render the first time.

Tests

init
  ✓ should create a js tag and initialize (16 ms)
  ✓ should NOT create events when url is not provided (19 ms)
push
  ✓ should append data to window._paq (2 ms)
router.routeChangeComplete event
  ✓ should trackPageView with correct title on route change (5 ms)
  ✓ should use previousPath as referer on consecutive route change (10 ms)
  ✓ should track route as search in /recherche (1 ms)
  ✓ should track route as search in /search (2 ms)
excludeUrlsPatterns
  ✓ should excluded login.php and token variables (7 ms)
  ✓ should exclude initial page tracking (4 ms)
  ✓ should track initial page if not excluded (3 ms)