Angular ui-router redirectTo trick

ngRedirectTo.js

// define app
angular.module('app', [])

// listen to state changes
.config(function($rootScope) { 
  $rootScope.$on('$stateChangeStart', function(event, toState, toParams, fromState) {
    // redirectTo
    if (toState.redirectTo) {
      event.preventDefault();
      $state.go(toState.redirectTo, toParams);
    }
  });
})

// states 
.config(function($stateProvider) {
  $stateProvider
    .state('home', {
      url: '',
      redirectTo: 'home.list'
    })
    .state('home.list', {
      url: '/list'
    });
});

It's kind of a hack that makes routes redirecting to child states by default. No need to do url: '', it still does not work.