Fluid - Google Inbox - Badge

gistfile1.js

function getMessagesCount() {
  var re = /\((\d+)\)/;
  var count = 0;

  Array.prototype.slice.call(document.querySelectorAll('.scroll-list-item.top-level-item')).forEach(function (el) {
    if (el.attributes.class.value.split(' ').indexOf('scroll-list-item-cluster') >= 0 && re.test(el.innerText)) {
      count += parseInt(/\((\d+)\)/.exec(el.innerText)[1], 10);
    } else {
      count++;
    }
  });
    
  return '' + (count || '');
}
 
function updateBadge() {
  window.fluid.dockBadge = getMessagesCount();
}

window.fluid.dockBadge = getMessagesCount();
setInterval(updateBadge, 1000);