SOURCE

new Vue({
  el:'#app',
  data: {
  	counter:0,
    x:0,
    y:0
  },
  methods: {
    increase: function(evevt) {
      this.counter += 2;
     },  
    updateCoordinates: function(event) {
      this.x = event.clientX;
      this.y = event.clientY; 
    },
    alertMe: function() {
      alert('Alert!!');
    }
    
    
 } 
})

<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>


<div id="app">
  <button v-on:click="increase(2,$event)">Click me</button>
  <button v-on:click="counter++">Click me</button>
  <p>{{ counter * 3 > 10 ? '大于10':'小于10'}}</p>
  <p v-on:mousemove="updateCoordinates">Coordinates: {{ x }} / {{ y }}
    -<span v-on:mousemove.stop=""> STOP </span>
  </p>
  <input type="text" v-on:keyup.enter.space="alertMe">
</div>