chromium/third_party/blink/web_tests/fast/forms/color-scheme/week/week-appearance-basic.html

<!DOCTYPE html>
<meta name="color-scheme" content="light dark">
<script src="../../../../resources/run-after-layout-and-paint.js"></script>
<script src="../../resources/common.js"></script>
<body>

<!-- no style for reference -->
<ul>
  <li>Week: <input type="week" /></li>
</ul>

<!-- disabled, readonly -->
<ul>
  <li>Week disabled: <input type="week" disabled/></li>
  <li>Week readonly: <input type="week" readonly/></li>
</ul>

<!-- RTL -->
<ul>
  <li>Week RTL: <input type="week" value="2019-W08" dir="rtl"/></li>
</ul>

<!-- font-size, font-weight -->
<ul>
  <li>Week font-size, font-weight: <input type="week" value="2019-W08" style="font-size: 36px; font-weight: bold;"/> </li>
</ul>

<!-- hover -->
<ul>
  <li>Week hover: <input type="week" id="hoverTarget" value="2019-W08"/></li>
</ul>

<!-- small width -->
<ul>
  <li>Week width: 10px: <input type="week" style="width: 10px;"/> </li>
</ul>

<!-- zoom -->
<ul>
  <li>Week zoom: 1.5: <input type="week" style="zoom: 1.5;"/></li>
  <li>Week zoom: 3: <input type="week" style="zoom: 3;"/></li>
</ul>

<script>

runAfterLayoutAndPaint(function() {
  var target = document.getElementById('hoverTarget');
  hoverOverElement(target);
}, true);

</script>

</body>