Vue example by reader @thoragio

Vue.html

<div id="counter">
  <button @click="up()">+</button>
  <p id="count">{{ value }}</p>
  <button @click="down()">-</button>
</div>
<script>
var counter = new Vue({
  el: '#counter',
  data: {
    value: 0
  },
  methods: {
    up: function() {
      this.value += 1
    },
    down: function() {
      this.value -= 1
    }
  }
})
</script>