Angular $watch count

bookmarklet.js

javascript: (function () {     var root = $(document.getElementsByTagName('body'));    var watchers = [];    var f = function (element) {        if (element.data().hasOwnProperty('$scope')) {            angular.forEach(element.data().$scope.$$watchers, function (watcher) {                watchers.push(watcher);            });        }        angular.forEach(element.children(), function (childElement) {            f($(childElement));        });    };    f(root);      console.log(watchers.length);})();