autosaveDirective.js

angular.module('autosaveExample', [])
  .directive("Autosaved", ["$timeout", function($timeout) {
    "use strict";

    return {
      link: function(scope, element, attrs) {
        var autosave = function() {
          $timeout(function() {
            var form = scope[element.attr("name")];
            if (form.$dirty) {
              element.submit();
              form.$setPristine();
            }
            autosave();
          }, 300);
        };
      }
    };
  }]);