Why my AngularJS module isn't defined -

here code:

var app = angular.module('todoapp', ['ui.router', 'ngresource', 'ui.bootstrap']);  app.config(['$stateprovider', '$urlrouterprovider',      function($stateprovider, $urlrouterprovider) {         $urlrouterprovider.otherwise("/");         $stateprovider         .state('home', {             url: "/",             templateurl: '/templates/index.html',         })         .state('signup', {             url: "/signup",             templateurl: '',         })     } ]);  module.exports = app; 

when i'm running in in browser, show me error: referenceerror: module not defined

what i'm doing wrong ? how define module ?

the console error message few lines below module not defined gives hint problem is:

module 'ui.router' not available! either misspelled module name or forgot load it.

check if have included file containing ui.router page (i.e. html template) angular can load it.