Untitled

Forcing changes to aria-hidden to take effect immediately on Mobile Safari
<style>
    ul {
        -webkit-transition: height 200ms linear;
        overflow: hidden;
    }
</style>
<div>Tap to expand</div>
<ul style="height: 0" aria-hidden="true">
    ....
</ul>

<div>Tap to expand</div>
<div>x</div>
<div>x</div>
<ul><!-- This works -->


<div>Tap to expand</div>
<div>x</div>
<ul><!-- This doesn't -->

<div>Tap to expand</div>
<div></div>
<div></div>
<ul><!-- Nor does this -->