<!DOCTYPE html>
<link rel=stylesheet href="resources/customizable-select-styles.css">

<style>
:root {
  color-scheme: dark;
}
</style>

<div class=customizable-select-button popovertarget=popover id=button>
  <span class=customizable-select-selectedcontent>one</span>
</div>
<div id=popover popover=auto anchor=button class=customizable-select-popover>
  <div class="customizable-select-option selected">one</div>
  <div class=customizable-select-option>two</div>
</div>

<script>
document.getElementById('popov