<script src="https://cdn.staticfile.org/vue/2.2.2/vue.min.js"></script>

<div id="app">

    <button v-on:click="counter += 1">增加{{counter}}</button>

    <p>这个按钮被点击了{{counter}}次。</p>

    <button v-on:click="counter2 -= 100">减少{{counter2}}</button>

    <p>这个按钮被点击了{{counter2}}次。</p>

</div>

new Vue({

  el: '#app',

  data: {

     counter: 0,

     counter2: 100,

  }

})