Duration.js + Angular.js Directive

duration_input.html

<input type="text" ng-model="myDuration" duration>

ngDuration.js

angular.module('App').directive('duration', function () {
  return {
    retrict: 'A',
    require: 'ngModel',
    link: function (scope, element, attr, ngModel) {
      ngModel.$parsers.push(function (str) {
        try {
          var d = Duration.parse(str);
          ngModel.$setValidity('durationValidate', true);
          return d.valueOf();
        } catch (e) {
          ngModel.$setValidity('durationValidate', false);
          return undefined;
        }
      });
      ngModel.$formatters.push(function (ms) {
        return new Duration(ms).toString();
      });
    }
  };
})