AngularJS 1.3.x

var app = angular.module('plunker', []);

app.run(function($http, $rootScope){
  $http.get('config.json').
  success(function(data, status, headers, config) {
    $rootScope.config = data;
    $rootScope.$broadcast('config-loaded');
  }).
  error(function(data, status, headers, config) {
    alert('error');
  });
})

app.controller('MainCtrl', function($scope, $rootScope) {
  $scope.name = 'Viblo';
  $scope.$on('config-loaded', function(){
    $scope.name = $rootScope.config.name;  
  });
});

<!DOCTYPE html>
<html ng-app="plunker">

  <head>
    <meta charset="utf-8" />
    <title>AngularJS Plunker</title>
    <script>document.write('<base href="' + document.location + '" />');</script>
    <link rel="stylesheet" href="style.css" />
    <script data-require="angular.js@1.3.x" src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.3.7/angular.js" data-semver="1.3.7"></script>
    <script src="app.js"></script>
  </head>

  <body ng-controller="MainCtrl">
    <p>Hello {{name}}!</p>
    <p>Hello {{config.name}}!</p>
  </body>

</html>

/* Put your css in here */

{
  "name":"Cùi Bắp"
}