console 命令行工具 X clear

console

var app = new Vue({
  el:'#app',
  data:{
    msg:0
  }
})

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8" />
  <title>v-事件</title>
</head>
<body>
  <div id="app">
    <span>{{msg}}</span>
    <button type="button" v-on:click="msg++">点击++</button>
  </div>
  <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
</body>
</html>