Multiple scopes

controllers.js

app.controller('HelloController', function($scope) {
  $scope.message = 'Hello World!';
});

app.controller('GoodbyeController', function($scope) {
  $scope.message = 'Goodbye World!';
});

view.html

<div ng-controller="HelloController">
  <input ng-model="message">
  <span>{{message}}</span>
</div>
<div ng-controller="GoodbyeController">
  <input ng-model="message">
  <span>{{message}}</span>
</div>