Vue.js - Simple Event Counter

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.0.3/vue.min.js"></script>
<div id="app">

    <button type="submit" @click="updateCount">
        Increment Counter: {{ count }}
    </button>

</div>

JavaScript

new Vue({

	el: '#app',
    data: {
		count: ""
    },
    methods: {
    	updateCount: function() {
        	this.count += "hi";
        }
    }

});