watcher counter targeting dom element

//count($0); for counting watchers on the selected dom element
//count($0, true); for counting watchers on the selected dom element + childrens

function count(el, recurs) {
    var root = $(el);
    var watchers = [];
    var f = function (element) {
      if (element.data().hasOwnProperty('$scope')) {
        angular.forEach(element.data().$scope.$$watchers, function (watcher) {
          watchers.push(watcher);
        });
      }
     if (recurs) {
        angular.forEach(element.children(), function (childElement) {
          f($(childElement));
        });
      }
    };
    f(root);
    //console.table(watchers, ['exp', 'last']);
    angular.forEach(watchers, function (watcher, index){
      console.log('================ ' + (index + 1) + ' ==================');
      console.log('watcher.exp :', watcher.exp);
      console.log('watcher.last :', watcher.last);
    });
    console.log('================ total ==================');
    console.log(watchers.length);
}