angular.module('sampleApp', []);
<!DOCTYPE html>
<html ng-app="sampleApp">

  <head>
    <meta charset="utf-8" />
    <title>AngularJS Plunker</title>
    <script>document.write('<base href="' + document.location + '" />');</script>
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.5/css/bootstrap.min.css" integrity="sha384-AysaV+vQoT3kOAXZkl02PThvDr8HYKPZhNT5h/CXfBThSRXQ6jW5DO2ekP5ViFdi" crossorigin="anonymous">
    <link href="style.css" rel="stylesheet" />
    
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js" integrity="sha384-3ceskX3iaEnIogmQchP8opvBy3Mi7Ce34nWjpBIwVTHfGYWQS9jwHDVRnpKKHJg7" crossorigin="anonymous"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/tether/1.3.7/js/tether.min.js" integrity="sha384-XTs3FgkjiBgo8qjEjBk0tGmf3wPrWtA6coPfQDfFEY8AnYJwjalXCiosYRBIBZX8" crossorigin="anonymous"></script>
    <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.5/js/bootstrap.min.js" integrity="sha384-BLiI7JTZm+JWlgKa0M0kGRpJbF2J8q+qreVrKBC47e3K6BW78kGLrCkeRX6I9RoK" crossorigin="anonymous"></script>
    <script src="//ajax.googleapis.com/ajax/libs/angularjs/1.5.5/angular.min.js"></script>
    <script src="main.js"></script>
    <script src="app.component.js"></script>
  </head>

  <body>
    <div class="pageheader">
      <h1>ngModel</h1>
      <p class="lead">Using ngModel in an Angular 1.x application</p>
    </div>
    <div class="container">
        <my-app>
          Loading...
        </my-app>
    </div>
  </body>

</html>
.pageheader {
    padding: 2rem 15px;
    color: #cdbfe3;
    background-color: #563d7c;
    padding-top: 2rem;
    padding-bottom: 2rem;
    padding-left: 3rem;
    margin-bottom: 2rem;
    text-align: left;    
}

.highlight {
    padding: 1rem;
    margin: 1rem -15px;
    background-color: #f7f7f9;
}
function AppComponentCtrl() {
  this.myModel = {
    username: 'poweruser',
    items: [
      { id: 1, label: 'Item One' },
      { id: 2, label: 'Item Two' },
      { id: 3, label: 'Item Three' }
    ],
    selectedItem: null,
    selectedColor: 'red',
    isChecked: true
  }
  
  // Pre-select item
  this.myModel.selectedItem = this.myModel.items[0];
}
  
var AppComponent = {
  bindings: {},
  templateUrl: 'app.component.html',
  controller: AppComponentCtrl
}

angular
  .module('sampleApp')
  .component('myApp', AppComponent);
<div class="row">
  <div class="col-sm-6">
    <form name="myForm" novalidate>
      <div class="form-group">
        <label for="exampleInput">Username</label>
        <input type="input" name="username" ng-model="$ctrl.myModel.username" required class="form-control" id="exampleInput" placeholder="Username">
      </div>
      <div class="form-group">
        <label for="exampleSelect">Example select</label>
        <select ng-options="item as item.label for item in $ctrl.myModel.items" ng-model="$ctrl.myModel.selectedItem" class="form-control" id="exampleSelect">
        </select>
      </div>
      <fieldset class="form-group">
        <legend>Radio buttons</legend>
        <div class="form-check">
          <label class="form-check-label">
            <input type="radio" class="form-check-input" ng-model="$ctrl.myModel.selectedColor" name="optionsRadios" value="red"> Red
          </label>
        </div>
        <div class="form-check">
          <label class="form-check-label">
            <input type="radio" class="form-check-input" ng-model="$ctrl.myModel.selectedColor" name="optionsRadios" value="green"> Green
          </label>
        </div>
        <div class="form-check">
          <label class="form-check-label">
            <input type="radio" class="form-check-input" ng-model="$ctrl.myModel.selectedColor" name="optionsRadios" value="blue"> Blue
          </label>
        </div>
      </fieldset>
      <div class="form-check">
        <label class="form-check-label">
          <input type="checkbox" ng-model="$ctrl.myModel.isChecked" class="form-check-input"> Check me out
        </label>
      </div>
      <button type="submit" class="btn btn-primary">Submit</button>
    </form>
  </div>
  <div class="col-sm-6">
    <pre class="highlight">{{$ctrl.myModel | json}}</pre>
    <pre class="highlight">{{myForm | json}}</pre>
  </div>
</div>