angular.module('focaDirectivas')
    .directive('escKey', function () {
        return function (scope, element, attrs) {
        element.bind('keydown keypress', function (event) {
            if(event.which === 27) { // 27 = esc key
            scope.$apply(function (){
                scope.$eval(attrs.escKey);
            });
    
            event.preventDefault();
            }
        });
        };
    });