title: how to preselect a select template in Vue?
body: <p>I am complete new to Vue. So sorry for "stupid" questions.</p>
  
  <p>I have following select in my vue template:</p>
  
  <pre><code>&lt;select style="width: 45px; height: 45px;padding-top: 5px;
                      padding-right: 5px; padding-bottom: 5px; padding-left: 5px;"
                      :value="cell"
                      @change="onChange($event)"
                      v-model="key"&gt;
          &lt;option&gt;0&lt;/option&gt;
          &lt;option&gt;1&lt;/option&gt;
          &lt;option&gt;2&lt;/option&gt;
          &lt;option&gt;3&lt;/option&gt;
          &lt;option&gt;4&lt;/option&gt;
          &lt;option&gt;5&lt;/option&gt;
          &lt;option&gt;6&lt;/option&gt;
          &lt;option&gt;7&lt;/option&gt;
          &lt;option&gt;8&lt;/option&gt;
          &lt;option&gt;9&lt;/option&gt;
        &lt;/select&gt;
  </code></pre>
  
  <p>{{cell}} is set correctly, but I cannot achive, that the select-template shows any preselected value. It is every time empty.</p>
  
  <p>Thank you for help!</p>