ui router: state events logging

route.event.log.js

$rootScope.$on('$stateChangeStart',function(event, toState, toParams, fromState, fromParams){
        console.log('$stateChangeStart to '+toState.to+'- fired when the transition begins. toState,toParams : \n',toState, toParams);
    });
    $rootScope.$on('$stateChangeError',function(event, toState, toParams, fromState, fromParams){
        console.log('$stateChangeError - fired when an error occurs during transition.');
        console.log(arguments);
    });
    $rootScope.$on('$stateChangeSuccess',function(event, toState, toParams, fromState, fromParams){
        console.log('$stateChangeSuccess to '+toState.name+'- fired once the state transition is complete.');
    });
    $rootScope.$on('$viewContentLoaded',function(event){
        console.log('$viewContentLoaded - fired after dom rendered',event);
    });
    $rootScope.$on('$stateNotFound',function(event, unfoundState, fromState, fromParams){
        console.log('$stateNotFound '+unfoundState.to+'  - fired when a state cannot be found by its name.');
        console.log(unfoundState, fromState, fromParams);
    });