<div id="app">
  <p>{{count}}</p>
  <button @click="countUp">クリックで実行</button>
</div>
body {
  background-color: #fff;
}
new Vue({
			el: "#app",
			data: {
				count:0
			},
			methods: {
				countUp: function() {
					this.count++;
				}
			}
		})

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

  1. https://cdnjs.cloudflare.com/ajax/libs/vue/2.6.10/vue.min.js