chosen.js

module.exports = /*@ngInject*/ function () {
	return {
		restrict: 'AE',
		link: function postLink (scope, elm, attrs) {
			var opt = {};
			
			if (attrs.nullable != undefined) {
				opt.allow_single_deselect = true;
			}
			
			scope.$watch(attrs.ngModel, function () {
				if (elm.data('chn')) {
					elm.trigger('chosen:updated');
				} else {
					elm.chosen(opt);
					elm.data('chn', true);
				}
			});
		}
	};
};