文档

• https://v2.cn.vuejs.org/v2/guide/installation.html

示例

index.html

<!-- 引入Vue 2.7.14 -->
<script src="https://cdn.jsdelivr.net/npm/vue@2.7.14/dist/vue.js"></script>

<!-- Vue节点 -->
<div id="app">
  <div>{{count}}</div>
  <div><button @click="handleClick">点击+1</button></div>
</div>

<!-- 逻辑 -->
 <script>
   const app = new Vue({
     el: '#app',

     // 数据
     data() {
       return {
         count: 0,
       };
     },

     // 方法
     methods: {
       handleClick() {
         this.count++;
       },
     },
   });
 </script>