Counting watchers on AngularJS

angular_watcher_counter.md

This Immediately Invoked Function Expression (IIFE) will print out the number of watchers currently on the page. Simply paste it into the console to see how many watchers are currently on the page. This IIFE was taken from Words Like Jared's answer on StackOverflow: http://stackoverflow.com/questions/18499909/how-to-count-total-number-of-watches-on-a-page

(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);
})();