Question

I have some global variables in head’s tag:

<script type="text/javascript">
    var apiRoot = 'http://localhost:8000/api',
        apiUrl = apiRoot,
        apiBadgeUrl = apiRoot + '/badges',
        apiLevelUrl = apiRoot + '/levels',
        apiBehaviorUrl = apiRoot + '/behaviors',
        apiTrophyUrl = apiRoot + '/trophies',
        apiUserUrl = apiRoot + '/users',
        apiWidgetPreferencesUrl = apiRoot + '/widgetPreferences';
</script>

I want to use in angular expression in html file but my tries are fails:

{{ $window.apiRoot }} or {{ apiRoot }} 

Answer 1

These expressions are evaluated against the current scope. If you have not set them in your scope via a controller, it will not evaluate. See http://docs.angularjs.org/guide/expression

Example:

function MyCtrl($scope)
{
   $scope.apiRoot = apiRoot;
}

HTML:

<div ng-controller="MyCtrl">
   {{apiRoot}}
</div>

As has been mentioned, while the above example works, it is not reccommended. The better way would be to set these variables in a service and then get them through the service.

function MyCtrl($scope, apiRootService)
{
   $scope.apiRoot = apiRootService.getApiRoot();
}

The service:

angular.module('myServices', []).factory('apiRootService', function() {
    var apiRoot = 'http://localhost:8000/api',
    apiUrl = apiRoot,
    apiBadgeUrl = apiRoot + '/badges',
    apiLevelUrl = apiRoot + '/levels',
    apiBehaviorUrl = apiRoot + '/behaviors',
    apiTrophyUrl = apiRoot + '/trophies',
    apiUserUrl = apiRoot + '/users',
    apiWidgetPreferencesUrl = apiRoot + '/widgetPreferences';
    return {
      getApiRoot: function() {
         return apiRoot
      },
      //all the other getters
   });