title: How to center a flex container but left-align flex items
body: <p>I want the flex items to be centered but when we have a second line, to have 5 (from image below) under 1 and not centered in the parent.</p>
  
  <p><a href="https://i.stack.imgur.com/GhD1E.png"><img src="https://i.stack.imgur.com/GhD1E.png" alt="enter image description here"></a></p>
  
  <p>Here's an example of what I have:</p>
  
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="false" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-css lang-css prettyprint-override"><code>ul {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    margin: 0;
    padding: 0;
  }
  li {
    list-style-type: none;
    border: 1px solid gray;
    margin: 15px;
    padding: 5px;
    width: 200px;
  }</code></pre>
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;ul&gt;
    &lt;li&gt;1&lt;/li&gt;
    &lt;li&gt;2&lt;/li&gt;
    &lt;li&gt;3&lt;/li&gt;
    &lt;li&gt;4&lt;/li&gt;
    &lt;li&gt;5&lt;/li&gt;
    &lt;li&gt;6&lt;/li&gt;
  &lt;/ul&gt;</code></pre>
  </div>
  </div>
  </p>
  
  <p><a href="http://jsfiddle.net/8jqbjese/2/">http://jsfiddle.net/8jqbjese/2/</a></p>