<script src="http://www.polymer-project.org/platform.js"></script>

<script src="http://www.polymer-project.org/polymer.js"></script>

​

<polymer-element name="sprite-canvas">

<template>

<style>

.leinwand {

 width:200px;

 height:200px;

 background-color: lightblue;

 }

 </style>

<canvas id="c" class="leinwand" width="200" height="200"></canvas>

</template>

<script>

Polymer('sprite-canvas', {

  leinwand : null,

  ready: function() {  

      console.log(this.$.c);

      console.log(this.shadowRoot.querySelector('.leinwand'));

    }

});

</script>    

</polymer-element>

​

<sprite-canvas></sprite-canvas>