Remove Kartra analytics URL parameters

<script>
/*
 * Remove Kartra analytics tracking parameters from link URLs.
 * Breaks Kartra tracking, but may be required if other software breaks.
 * For Kartra pages, add to body tracking.
 * Last updated 2024-10-04
 */
function untrackLinks () {
    for (const link of document.querySelectorAll('a[href*="kuid"],a[href*="kref"]')) {
        const url = new URL(link.href), sp = url.searchParams;
        sp.delete('kref');
        sp.delete('kuid');
        url.search = sp.toString();
        link.href = url.toString();
    }
}
(() => {
    const mo = new MutationObserver(mrs => {
        for (const mr of mrs) {
            if (mr.attributeName) {
                untrackLinks();
                return;
            }
        }
    });
    // Wait for body to be complete before starting repairs
    document.addEventListener('DOMContentLoaded', () => {
        untrackLinks();
        mo.observe(document.body, {
            subtree: true, childList: true, attributes: true,
            attributeFilter: [ 'href' ]
        });
    });
})();
</script>