console 命令行工具 X clear

console

var app = new Vue({
  el: '#app',
  template: `<h1>{{msg}}</h1>`,
  data: {
    message: 'hello world'
  }
});

<script src='//cdn.bootcss.com/vue/2.4.2/vue.js'>
</script>
<script src='//cdn.bootcss.com/vue-router/2.7.0/vue-router.js'>
</script>
<script src='//cdn.bootcss.com/vuex/2.3.1/vuex.js'>
</script>
<div id="app">
  {{message}}
</div>