get rid of hiccup on toggle

Question

I am using jquery ui toggle for a dropdown on a map legend.

The problem is that when you click on the class to show the drop down div; there is a slight hiccup where the div jumps a bit. Anyone know why this is happening? Here's my html:

<h3 id="conservation-header">
<i class="icon-stop" style="color:#739435;"></i> 
<i class="icon-caret-down" style="color:#fff;"></i> 
<span class="dropdown">Conservation</span> &nbsp; 
<span class="extras" style="color:#739435;">[
<a style="color:#739435;" id="conservationMoreLink" href="#">info</a>] &nbsp; [
<a style="color:#739435;" >images</a>]</span>
</h3>

       <div class="dropThis" style="display:none;">
       <ul>
         <li>Preservation</li>
         <li>Silviculture</li>
         <li>Limited Agriculture consistent with resource value</li>
         <li>Environmental Services</li>
         <li>Mitigation</li>
         <li>Recreation</li>
         <li>Roadway Connections</li>
         </ul>
       </div>

Here's my jsfiddle

thanks in advance

Answer 1

I've been able to fix hiccups/jumps in the past by setting the backface- visiblity of the element (or any parent element) to 'hidden';

If you're testing this in Chrome, try adding -webkit-backface-visibility: hidden; to the body element and see if the problem is fixed.

More info on backface- visibility.

Answer 2

Set the ul style to:

margin-top: 0;