Vue.js: templates in HTML file

What works and what doesn't.

HTML

<script type="x-template" id="tpl-upload">
    <h1>This is templated</h1>
</script>

<div id="app">
    <p>{{ sayHello() }}</p>
</div>

JavaScript

var app = new Vue({
    el: '#app' ,
   	data: {
    	title: 'Hello World'
    },
    methods: {
    	sayHello: function() {
      	return 'Hello!';
      }
    }
});