title: flex direction column reverse for top and bottom children
body: <p>I try to make this layout using <code>flex-direction: column-reverse</code> where button 1 and button 2 order is swapped without changing the html:</p>
  <pre><code>&lt;button&gt;2&lt;/button&gt;
  &lt;button&gt;1&lt;/button&gt;
  </code></pre>
  <p>but I can't apply flex because it became 1 liner.</p>
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-css lang-css prettyprint-override"><code>.flex {
     display: flex;
  }
  
  button {
     width: 100%;
  }
  
  .wrap {
     width: 200px;
  }</code></pre>
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;div class="wrap"&gt;
     &lt;div class="flex"&gt;
        &lt;button&gt;2&lt;/button&gt;
        &lt;button&gt;1&lt;/button&gt;
     &lt;/div&gt;
  &lt;/div&gt;</code></pre>
  </div>
  </div>
  </p>