<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS contain-intrinsic-size: single-select list box</title>
<link rel="author" title="Oriol Brufau" href="mailto:obrufau@igalia.com">
<link rel="help" href="https://drafts.csswg.org/css-sizing-4/#intrinsic-size-override">
<link rel="help" href="https://html.spec.whatwg.org/multipage/rendering.html#list-box">
<style>
.ciw-0 {
  contain-intrinsic-width: 0px;
}
.ciw-100 {
  contain-intrinsic-width: 100px;
}
.cih-0 {
  contain-intrinsic-height: 0px;
}
.cih-100 {
  co