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Using Fathom Analytics with Next.js

Fathom Analytics is a privacy-focused alternative to traditional analytics tools. This guide will show you how to integrate Fathom with your Next.js application.

First, install the Fathom client package:

npm install fathom-client

Create a new file called app/fathom.tsx in your project:

app/fathom.tsx
'use client';


import { load, trackPageview } from 'fathom-client';
import { useEffect, Suspense } from 'react';
import { usePathname, useSearchParams } from 'next/navigation';


function TrackPageView() {
  const pathname = usePathname();
  const searchParams = useSearchParams();


  useEffect(() => {
    load(process.env.NEXT_PUBLIC_FATHOM_ID, {
      auto: false
    });
  }, []);


  useEffect(() => {
    if (!pathname) return;


    trackPageview({
      url: pathname + searchParams?.toString(),
      referrer: document.referrer
    });
  }, [pathname, searchParams]);


  return null;
}


export function FathomAnalytics() {
  return (
    <Suspense fallback={null}>
      <TrackPageView />
    </Suspense>
  );
}

This component does the following:

  1. Loads the Fathom script when the component mounts
  2. Tracks pageviews when the route changes

Note: Ensure you add your Fathom ID to your .env file.

Add the Fathom component to your root app/layout.tsx file:

app/layout.tsx
import { FathomAnalytics } from './fathom';


export default function RootLayout({ children }: { children: ReactNode }) {
  return (
    <html lang="en">
      <body>
        <FathomAnalytics />
        {children}
      </body>
    </html>
  );
}
  1. The Fathom component is a client component (e.g. "use client")
  2. We use usePathname() and useSearchParams() to track route changes
  3. The Fathom script is loaded with auto: false to prevent automatic pageview tracking

To track custom events, you can use the trackEvent function from fathom-client:

import { trackEvent } from 'fathom-client';


// In your component
const handleClick = () => {
  trackEvent('GOAL_ID', 0); // 0 is the value (optional)
};

Replace 'GOAL_ID' with the actual goal ID from your Fathom dashboard.

By following this guide, you'll have Fathom Analytics integrated into your Next.js application, providing privacy-focused analytics for your site.

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