<title>Vue 测试实例 - W3xue教程(w3xue.com)</title>
<script src="//unpkg.com/vue/dist/vue.js"></script>
<button-counter @increment="incrementTotal"></button-counter>
<button-counter @increment="incrementTotal"></button-counter>
Vue.component('button-counter', {
template: '<button @click="addnow">{{ counter }}</button>',
incrementTotal: function () {