The ionRange directive only support initialize the plugin

[santiblanko]

My modification:

    return {
        restrict: 'AE', //attribute or element
        scope: {
            ngModel: '='
        },
        template: '<div></div>',
        replace: true,
        transclude: true,

        link: function(scope, element, attributes) {

            $(element).ionRangeSlider(scope.ngModel);

            var slider = $(element).data("ionRangeSlider");

            slider.update({
                 keyboard: true,
                 grid:true,
                onFinish: function(data) {
                    scope.ngModel.from = data.from;
                    $timeout(function() {
                        scope.$apply();
                    });
                }
            });

            scope.$watchCollection('ngModel', function(newValue, oldValue) {
                if (newValue !== oldValue) {
                    slider.update(newValue);
                }
            });

        }
    };