title: how to make infinite nested loop
body: <p>i have a multiple array into array could infinite like </p>
  
  <pre><code>['level1', ['level2', ['level3', ['level4']]]]
  </code></pre>
  
  <p>i really don't understand how can i use v-for loop in vue2</p>
  
  <pre><code>&lt;template&gt;
      &lt;ul&gt;
          &lt;li v-for="downline in downlines" :key="downline.id"&gt;
              {{ downline.name }}
          &lt;/li&gt;
      &lt;/ul&gt;
  &lt;/template&gt;
  
  &lt;script&gt;
      export default {
          data(){
              return {
                  downlines: [] //&lt;-- infinite array
              }
          }
      }
  &lt;/script&gt;
  </code></pre>