title: How to watch component binding change using Angular component
body: <p>How can I listen to angular component binding change and perform actions?</p>
  
  <pre><code>angular.module('myapp')
      .component('myComponent', {
          templateUrl: 'some.html',
          controller: MyController,
          controllerAs: 'myCtrl',
          bindings: {
              items: '&lt;'
          }
      });
  </code></pre>
  
  <p>now when <code>items</code> changes I want to perform another action using this value,<br>
  How can I do it?</p>