examples/pipetobrowser/browser/views/error/component.html

<link rel="import" href="../../libs/vendor/polymer/polymer/polymer.html">

<polymer-element name="p2b-error">
  <template>
    <h1>error: {{errorMessage}}</h1>
  </template>
  <script>
    Polymer('p2b-error', {
      ready: function() {
      },
      errorMessage: null
    });
    </script>
</polymer-element>