title: trigger false to true in vue
body: <p>I am using laravel 5.6 and I'm trying to hit the false item to true for submit the button spinner.</p>
  
  <p>My form looks like this:</p>
  
  <pre><code>&lt;template&gt;
  &lt;form aria-label="Register" @submit.prevent="hit()"&gt;
  &lt;button type="submit" class="btn btn-primary"&gt;
     &lt;i class="fa fa-circle-o-notch fa-spin" v-if="spin"&gt;&lt;/i&gt; Register
  &lt;/button&gt;
  &lt;/template&gt;
  </code></pre>
  
  <p>I added <code>v-if="spin"</code>:</p>
  
  <pre><code>&lt;script&gt;
  data(){
     return{
       spin:false    
     }
  },
  methods:{
   hit(){
    spin = true
  }
  &lt;/script&gt;
  </code></pre>
  
  <p>It doesn't work! But when I change the data: spin to true. It keeps spinning by default.</p>
  
  <p>Please help me.</p>