FacetWP - store post IDs into a cookie

test.js

<script>
(function($) {
  $(document).on('facetwp-loaded', function() {
    var cookie_data = JSON.stringify(FWP.settings.post_ids);
    setCookie("fwp_posts", cookie_data, 7);
  });
})(jQuery);

function setCookie(cname, cvalue, exdays) {
    var d = new Date();
    d.setTime(d.getTime() + (exdays*24*60*60*1000));
    var expires = "expires="+d.toUTCString();
    document.cookie = cname + "=" + cvalue + "; " + expires;
}
</script>