console 命令行工具 X clear

console

new Vue({
  el: '#demo',
  data: {
    show: true
  }
})

<div id="demo">
  <button v-on:click="show = !show">
    Toggle
  </button>
  <transition name="fade">
    <p v-if="show">hello</p>
  </transition>
</div>