demo · v134
Select Parser Relaxation
The HTML parser now allows wrapping <div>, <span>, <img> and similar elements inside <select> — the substrate the Customizable <select> feature builds on. Pre-134 the parser silently stripped them and your option groups collapsed. Edit the markup; the live tree shows what actually parsed.
probing parser leniency for <select>...
Try it
parsed tree
live render
The code
<select>
<div class="group">
<span class="label">Fruit</span>
<option>apple</option>
</div>
</select>
<!-- v134: HTML parser keeps the wrapping div + span.
Pre-134: silently dropped, options collapsed. -->