title: text-overflow ellipsis on flex child not working
body: <p>I have container with <code>flex</code>. I want the middle child will take the entire space so I set it <code>flex: 1</code>. So far so good.</p>
  
  <p>The next level is that the middle child has 2 child so I want to set it flex too (If you lost me, just skip to the snippet) and the first child I set ellipsis styles. Now, the ellipsis stops working.</p>
  
  <p>If you will click on the button, you will see that everything good with short text;</p>
  
  <p>Any ideas?</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-js lang-js prettyprint-override"><code>function toggle() {
    var el = document.querySelector('.el');
    el.textContent = el.textContent === 'short' ? 'long long long text' : 'short';
  }</code></pre>
  <pre class="snippet-code-css lang-css prettyprint-override"><code>.wrapper {
    display: flex;
    width: 200px;
    align-content: stretch;
    padding: 5px;
    min-width: 0;
    border: 1px solid
  }
  
  .wrapper .child2 {
    flex-grow: 1;
  }
  
  .flex {
    display: flex;
    min-width: 0;
  }
  
  .el {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }
  
  .child1 {
    background: red;
  }
  
  .child2 {
    background: blue;
  }
  
  .child3 {
    background: green;
  }
  
  .wrapper&gt;* {
    padding: 5px;
  }</code></pre>
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;div class="wrapper"&gt;
    &lt;div class="child1"&gt;child1&lt;/div&gt;
    &lt;div class="child2"&gt;
      &lt;div class="flex"&gt;
        &lt;div class="el"&gt;long long long text&lt;/div&gt;
        &lt;div&gt;a&lt;/div&gt;
      &lt;/div&gt;
    &lt;/div&gt;
    &lt;div class="child3"&gt;child3&lt;/div&gt;
  &lt;/div&gt;
  
  &lt;button onclick="toggle()"&gt;Toggle ellipsis text&lt;/button&gt;</code></pre>
  </div>
  </div>
  </p>