title: how to find li with a particular data
body: <p>I have the following html code:</p>
  
  <pre><code>&lt;ul class="dropdown-menu shopping-cart-nav-drpdown"&gt;                                                              
      &lt;li class="item" data-item-id="58"&gt;
  
       &lt;/li&gt;
       &lt;li class="item" data-item-id="100"&gt;
  
       &lt;/li&gt;
       &lt;li class="item last"&gt;
       &lt;a href="/cart" class="btn btn-info full-button"&gt;View Cart&lt;/a&gt;
       &lt;/li&gt;
  &lt;/ul&gt;
  </code></pre>
  
  <p>Inside this <code>shopping-cart-nav-drpdown</code>, how do I find the li that has data-item-id=58? Is it possible to do this without iterating through all the children of ul and use getAttributes?</p>