title: How do set a default value in select option in element UI for Vue?
body: <p>I am working on a Vue app made with element UI and I have a bunch of el-select whose el-options need to have default values, meaning the form select fields already have one  option pre-selected (of course the user can still choose other options).
  I cannot find any attribute in the official doc <a href="https://element.eleme.io/#/en-US/component/select#select" rel="nofollow noreferrer">https://element.eleme.io/#/en-US/component/select#select</a>
  But there should be a way to achieve this right?</p>
  <p>This is my code</p>
  <pre><code>&lt;el-form-item label=&quot;some label&quot; prop=&quot;someprop&quot;&gt;
      &lt;el-select v-model=&quot;form.status&quot; filterable clearable&gt;
          &lt;el-option
              v-for=&quot;(item, index) in config.status&quot;
              :key=&quot;index&quot;
              :label=&quot;item&quot;
              :value=&quot;index&quot;
              how to have default option here??
              &gt;
          &lt;/el-option&gt;
      &lt;/el-select&gt;
  &lt;/el-form-item&gt;
  </code></pre>