gistfile1.js

app.directive('draggableTask', function() {
    return {
        restrict: 'A',
        replace: false,
        transclude: false,
        link: function(scope, element, attrs) {
            attrs.$observe('taskContainer', function() {
                console.log("task container: " + attrs.taskContainer);
                element.draggable({ 
                    containment: '#' + attrs.taskContainer 
                }); 
            });
            //
            //console.log(attrs['task-container']);
                       
        }
    };
});