With Google Analytics, it’s very easy to track how users are interacting with facets.

First, make sure your site is using the new GA embed (notice the gtag() function):

<!-- Global site tag (gtag.js) - Google Analytics -->
<script async src="https://www.googletagmanager.com/gtag/js?id=UA-XXXXXXXX-1"></script>
  window.dataLayer = window.dataLayer || [];
  function gtag(){dataLayer.push(arguments);}
  gtag('js', new Date());

  gtag('config', 'UA-XXXXXXXX-1');

Next, we use the ga() function within the facetwp-loaded event to trigger a pageview.

document.addEventListener('facetwp-loaded', function() {
    if (FWP.loaded) {
        gtag('config', 'UA-XXXXXXXX-1', {'page_path': window.location.pathname + window.location.search});

Both snippets can go into your theme’s header.php (or into a custom javascript file). Just make sure to replace UA-XXXXXXXX-1 with your actual Analytics identifier ID!

See also