facet.js

$(document).on('facetwp-loaded', function() {
  $('.facetwp-facet').each(function() {
    var facet_name = $(this).attr('data-name');
    var facet_label = FWP.settings.labels[facet_name];
    if ( 'undefined' !== typeof FWP.settings.num_choices[facet_name] && FWP.settings.num_choices[facet_name] > 0 && $('.facet-label[data-for="' + facet_name + '"]').length < 1 ) {
      $(this).before('<h3 class="facet-label" data-for="' + facet_name + '">' + facet_label + '</h3>');
    }
  });
});