console 命令行工具 X clear

console

new Vue({
  el: '#app',
  data: {
    isActive: true,
    hasError: true
  }
})

<div id="app">
  <div class="static" v-bind:class="{ active: isActive, 'text-danger': hasError }">
  </div>
</div>

.active {
    width: 100px;
    height: 100px;
    background: green;
}
.text-danger {
      width: 50px;
    height: 50px;
    background: red;
}