Early click - click that happens before model changed on the checkbox and can prevent change of it

gistfile1.js

.directive('earlyClick', function() {
    return {
        require: '?ngModel',
        link: {
            pre: function(scope, iElement, iAttrs, ctrl)
            {
                ctrl = null;
                if (ctrl) {
                    //First way: reset the state inside a parser
                    ctrl.$parsers.push(function(val) {
                        console.log('I am being parsed');

                        ctrl.$viewValue = null;
                        ctrl.$render();
                        return null;
                        return val;
                    });
                }

                // Second way: prevent the click
                iElement.on('click', function($event) {
                    $event.stopImmediatePropagation();
                    $event.preventDefault();
                    //console.log('early click');
                })
            }
        }
    }
});