Angular debug script for getting watchers of a certain directive or DOM element. Based on: https://gist.github.com/kentcdodds/31c90402750572107922

get-angular-watchers.js

function getWatchers(root) {
  root = angular.element(root || document.documentElement);
  console.log('You selected this element:', root);

  function getElemWatchers(element) {
    var isolateWatchers = getWatchersFromScope(element.data().$isolateScope);
    var scopeWatchers = getWatchersFromScope(element.data().$scope);
    var watchers = scopeWatchers.concat(isolateWatchers);
    angular.forEach(element.children(), function (childElement) {
      watchers = watchers.concat(getElemWatchers(angular.element(childElement)));
    });
    return watchers;
  }

  function getWatchersFromScope(scope) {
    if (scope) {
      return scope.$$watchers || [];
    } else {
      return [];
    }
  }

  function getWatcherExpressions (element) {
    var watchers = getElemWatchers(element);
    var watchlist = {
      '_total': watchers.length
    };
    angular.forEach(watchers, function (watcher) {
      watchlist[watcher.exp] = watchlist[watcher.exp] || [];
      watchlist[watcher.exp].push(watcher);
    });
    return watchlist;
  }

  return getWatcherExpressions(root);
}

getWatchers();