Why the second click on popup will appear two duplicate pages


#1
{
    path: '/contacts-list/',
    popup: {
      url: './pages/contacts-list.html',
    }
  }

<div class="popup ">
  <div class="view">
    <div class="page">
      <div class="navbar">
        <div class="navbar-inner sliding">
          <div class="left">
            <a href="#" class="link back">
              <i class="icon icon-back"></i>
              <span class="ios-only">Back</span>
            </a>
          </div>
          <div class="title">Contacts List</div>
        </div>
      </div>
      <div class="page-content">
       
      </div>
    </div>
  </div>
</div>

image


#2