How to set flex-basis on secondary axis
<p><em>How to make a flex item to shrink in secondary axis?</em></p>

<p>For example, I have container which has lots of items inside. They all are positioned in column, but I want they width also can be shrinked:</p>

<pre><code>.container {
  display: flex;
  flex-direction: column;
  .item {
    width: 200px;
    flex: 0 1 @item-height;
    //flex-shrink here means Y-axis. How to set flex-shrink for X-axis??
  }
}
</code></pre>