title: word-wrap not working in flex-item inside row flex container
body: <p>Why is <code>word-wrap</code> not working in a <code>flex-item</code> inside <code>row</code> flex container?</p>
  
  <p><strong>CSS</strong></p>
  
  <pre><code>.container {
    width: 300px;
    border: 2px solid red;
    margin: 0 0 20px 0;
  }
  
  .text-container {
    background-color: cyan;
    word-wrap: break-word;
  }
  
  .flex-row {
    display: flex;
    flex-flow: row wrap;
  }
  
  .flex-column {
    display: flex;
    flex-flow: column nowrap;
  }
  </code></pre>
  
  <p><strong>HTML:</strong></p>
  
  <pre><code>&lt;div class="container"&gt;
       &lt;div class="flex-row"&gt;
             &lt;div class="text-container"&gt;
                ThisIsAVeryVeryLongWordWithNoSpacesInBetweenDoesNotWrap
             &lt;/div&gt;
       &lt;/div&gt;
   &lt;/div&gt;
  
   &lt;div class="container"&gt;
       &lt;div class="flex-column"&gt;
           &lt;div class="text-container"&gt;
               ThisIsAVeryVeryLongWordWithNoSpacesInBetweenWraps
           &lt;/div&gt;
       &lt;/div&gt;
   &lt;/div&gt;
  </code></pre>
  
  <p><div class="snippet" data-lang="js" data-hide="true" data-console="true" data-babel="false">
  <div class="snippet-code snippet-currently-hidden">
  <pre class="snippet-code-css lang-css prettyprint-override"><code>.container {
    width: 300px;
    border: 2px solid red;
    margin: 0 0 20px 0;
  }
    
  .text-container {
    background-color: cyan;
    word-wrap: break-word;
  }
    
  .flex-row {
    display: flex;
    flex-flow: row wrap;
  }
    
  .flex-column {
    display: flex;
    flex-flow: column nowrap;
  }</code></pre>
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;div class="container"&gt;
       &lt;div class="flex-row"&gt;
             &lt;div class="text-container"&gt;
                ThisIsAVeryVeryLongWordWithNoSpacesInBetweenDoesNotWrap
             &lt;/div&gt;
       &lt;/div&gt;
   &lt;/div&gt;
  
   &lt;div class="container"&gt;
       &lt;div class="flex-column"&gt;
           &lt;div class="text-container"&gt;
               ThisIsAVeryVeryLongWordWithNoSpacesInBetweenWraps
           &lt;/div&gt;
       &lt;/div&gt;
   &lt;/div&gt;</code></pre>
  </div>
  </div>
  </p>