title: Border left gradient
body: <p>That is my css:</p>
  
  <pre><code>width: 0;
  height: 0;
  border-top: 31px solid transparent;
  border-bottom: 31px solid transparent;
  border-left: 31px solid #0caa3f;
  </code></pre>
  
  <p>Is it possible to make border-left have a gradient?</p>