modulo de accesos firebase desde polymer

app-comercios-modulegen

<link rel="import" href="../../bower_components/polymer/polymer.html">
  <link rel="import" href="../../bower_components/firebase-element/firebase-collection.html">
  <link rel="import" href="../../bower_components/firebase-element/firebase-document.html">

<dom-module id="app-comercios">
  <template>
    <div class="vertical-section">
      <h3>Comercios Destacados</h3>
      <template is="dom-bind">
        <firebase-collection
          order-by-child="ganancia"
          location="https://polymernickdemo.firebaseio.com/comercios"
          data="{{comercios}}"></firebase-collection>
        <template is="dom-repeat" items="[[comercios]]" as="comercio">
          <h4>[[comercio.__firebaseKey__]]</h4>
          <span>Ganancia: </span><span>$ </span><span>[[comercio.ganancia]]</span>
        </template>
      </template>
    </div>
  </template>
    
<script>
    (function() {
      'use strict';

      Polymer({
        is: 'app-comercios',

        properties: {
          
        }
      });
    })();
  </script>
</dom-module>