I have a URL that I need to redirect away from if the page visitor does not have a specific parameter in the URL when they visit the page. This is the code I have, but it seems to only work one time in Firefox and not at all when Chrome or Edge.

The goal is that if the visitor has the gcl_customer_id parameter in the URL, they stay on the page. If there is no parameter in the URL when they visit the page, they need to be redirected away instantly.

I can only do this on the client side, in browser on page load. I have no ability to handle this server side.

How can I fix this code?

  <script>
    function checkForXYZId() {
      const urlParams = new URLSearchParams(window.location.search);
      if (!urlParams.has('xyz_id')) {
        window.location.href = 'https://facebook.com'; 
      }
    }
    window.onload = checkForXYZId;
  </script>