AngularJS “ReferenceError: window is not defined” in NodeJS Application

I'm trying to use Angular module in nodeJS Application with express 4 and jade.

So, for it i did npm install angular --save and var angular = require('angular'); in app.js.

But It's Throwing an Error

e:\Project\node_modules\angular\angular.js:29016
})(window, document);
   ^
ReferenceError: window is not defined
    at Object.<anonymous> (e:\Project\node_modules\angular\angular.js:29016:4)
    at Module._compile (module.js:456:26)
    at Object.Module._extensions..js (module.js:474:10)
    at Module.load (module.js:356:32)
    at Function.Module._load (module.js:312:12)
    at Module.require (module.js:364:17)
    at require (module.js:380:17)
    at Object.<anonymous> (e:\Project\node_modules\angular\index.js:1:63)
    at Module._compile (module.js:456:26)
    at Object.Module._extensions..js (module.js:474:10)
    at Module.load (module.js:356:32)
    at Function.Module._load (module.js:312:12)
    at Module.require (module.js:364:17)
    at require (module.js:380:17)
    at Object.<anonymous> (e:\Project\app.js:11:15)
    at Module._compile (module.js:456:26)

In Reason for this.

I'm going to set active status to my sidebar in anjularjs. Here My Jade File

ul.sidebar-nav(ng-controller="HeaderController")
    // li.sidebar-brand
    li(ng-class="{ active: isActive('/dashboard')}")
        a(href='/dashboard') Dashboard
    li(ng-class="{ active: isActive('/cases')}")
        a(href='/cases') Cases
    li(ng-class="{ active: isActive('/contacts')}")
        a(href='/contacts') Contacts
    li(ng-class="{ active: isActive('/documents')}")
        a(href='/documents') Documents
    li(ng-class="{ active: isActive('/calendar')}")
        a(href='/calendar') Calendar
    li(ng-class="{ active: isActive('/timeline')}")
        a(href='/timeline') Timeline

and here module

function HeaderController($scope, $location) 
{ 
    $scope.isActive = function (viewLocation) { 
        return viewLocation === $location.path();
    };
}