bizname-enforce-default-url-query-param.js

<script id="bizname-enforce-default-url-query-param">
    // Source: https://gist.github.com/cliffordp/f4aa43badd4d99cee537a82ff0e5ab3b
    // Related: https://youtu.be/MHKzHf1BhrY

    // Function to check for the 'bizname' query parameter and redirect if not present.
    (function enforceDefaultBiznameQueryParam() {
        const urlParams = new URLSearchParams(window.location.search);
        const bizname = urlParams.get('bizname');

        // If 'bizname' query param is not present or is an empty string, redirect.
        if (
            (bizname === null || bizname.trim() === '')
            && '/only-here' === window.location.pathname // OPTIONAL if you want to restrict applying to a specific page.
        ) {
            // Construct the new URL with the default 'bizname' query parameter.
            const currentUrl = new URL(window.location.href);
            currentUrl.searchParams.set('bizname', 'Your Business Name');
            window.location.href = currentUrl.toString();
        }
    })();
</script>