AngularJS scope true

HTML

<div ng-app="helloHabrahabr">
    <div ng-controller="forExampleController">
        Interpolated: {{hello}}<br/>        
        Directive: <span habra-habr></span> 
    </div>    
</div>

JavaScript

function forExampleController($scope){
    $scope.hello="Hello";
}


angular.module('helloHabrahabr', [])
    .directive('habraHabr', function() {        
        return {
            template:"<input ng-model='hello'>{{hello}}",
            scope:true
        }
    });