code: function updateDisplayCount() {
    let visibleCount = 0;
    let totalCount = Object.keys(receivers).length;
    let trs = Array.from(tbody.getElementsByTagName('tr'));
  
    trs.forEach(function(tr) {
      if(tr.style.display === '') {
        visibleCount++;
      }
    });
    displayCount.value = visibleCount + ' of ' + totalCount;
  }
docs: Update display count