discount-room.html

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

<polymer-element name="discount-room">
	<template>
		<core-firebase 	location="https://discount-app.firebaseio.com/" 
						list="{{discount}}" 
						on-items-added={{update}}>
		<input id="uchar" type="text"></input>
		<button id="submit" on-click={{sendChar}}>Submit</button>
		<hr>
		<pre id="display"></pre>
	</template>
	<script>
		Polymer('discount-room', {
			ready: function (){
				console.log(this.discount);
			},
			sendChar: function sendChar(){
				console.log(this.discount);
				chr = this.$.uchar.value;
				this.discount.push({uchar: chr, posx: 0, posy: 0});
				console.log(this.discount);
			},
			update: function update(){
				this.$.display.innerHTML = JSON.stringify(this.discount);
			}

		});
	</script>
</polymer-element>