License for the specific language governing permissions and limitations under
  ~ the License.
  -->

<!doctype html>

<head>
  <script type="text/javascript" src="/vaadin/web-component/fire-event.html"></script>
</head>

<body>
  <p>
    Web components updates property as a response to a button click.
  </p>

  <fire-event id="calc"></fire-event>
  <p id="sum">0</p>
  <p id="error"></p>

  <div id="container">
      <div id="sub-container">
          <fire-event id="contained"></fire-event>
      </div>
  