Google Analytics + Polymer web component

google-analytics.html

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

<polymer-element name="google-analytics" attributes="account domain">
  <script>
  // Google Analytics snippet
  (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
  (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
  m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
  })(window,document,'script','//www.google-analytics.com/analytics.js','ga');

  Polymer({
    account: '',
    domain: 'auto',
    ready: function () {
      if (!this.account) {
        console.error('Error: Google Analytics account is not set.');
        return;
      }
      if (!this.domain) {
        console.error('Error: Google Analytics domain is not set.');
        return;
      }
      window.ga('create', this.account, this.domain);
      window.ga('send', 'pageview');
    }
  });
  </script>
</polymer-element>