[AngularJS] Angular 1.3 $submitted for Form in Angular

AngularJS 1.3 add $submitted for form, so you can use $submitted to track whether the submit event is trggered.

<!DOCTYPE html>
<html>
<head>
  <script src="//ajax.googleapis.com/ajax/libs/angularjs/1.3.0/angular.min.js"></script>
  <title>What's new in Angular 1.3</title>
</head>
<body ng-app="app" ng-controller="MainCtrl as vm">
  <h1>Angular {{vm.angularVersion}}</h1>  
  <h2>Demo</h2>
  
  
  <form name="myForm" novalidate>
    <label>
      Some input:
      <input
             type="time"
             name="myField" 
             ng-model="vm.inputValue"
             ng-model-options="vm.modelOptions"
             required />
      
    </label>
    <button type="submit">Submit</button>
  </form>
    
  Bound value: <span ng-bind="vm.inputValue"></span> <br />
  Field Error State: <pre>{{myForm.myField.$error | json}}</pre> <br />
  Form Error State: <pre>{{myForm.$error | json}}</pre>
  myForm.$submitted: {{myForm.$submitted}}
  
</body>
</html>

var app = angular.module('app', []);

app.controller('MainCtrl', function MainCtrl() {
  'use strict';
  
  var vm = this;
  vm.angularVersion = angular.version.full;
  vm.modelOptions = {
    timezone: 'UTC'
  };
});

Form Error State:
{
  "required": [
    {
      "$viewValue": "",
      "$validators": {},
      "$asyncValidators": {},
      "$parsers": [
        null,
        null
      ],
      "$formatters": [
        null
      ],
      "$viewChangeListeners": [],
      "$untouched": true,
      "$touched": false,
      "$pristine": true,
      "$dirty": false,
      "$valid": false,
      "$invalid": true,
      "$error": {
        "required": true
      },
      "$name": "myField",
      "$options": {
        "timezone": "UTC",
        "updateOnDefault": true
      }
    }
  ]
}
myForm.$submitted: false