polymer_1.8.1/bower_components/app-route/demo/youtube-demo/route-info.html

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

<dom-module id="route-info">
  <template>
    <style>
      :host {
        font-style: italic;
        font-size: 0.85em;
        font-weight: 200;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        color: #fff;
      }
    </style>
    <span>Route prefix: {{route.prefix}} &middot; Route path: {{route.path}} &middot; Query params: {{_stringifyQueryParams(route.queryParams.*)}}</span>
  </template>
  <script>
    Polymer({
      is: 'route-info',

      properties: {
        route: {
          type: Object
        }
      },

      _stringifyQueryParams: function() {
        var params = [];
        if (this.route && this.route.queryParams) {
          for (var key in this.route.queryParams) {
            params.push(key + ' = ' + this.route.queryParams[key]);
          }
        }
        return params.join(', ');
      }
    })
  </script>
</dom-module>