css/css-grid/table-grid-item-dynamic-003.html

<!doctype html>
<!--
     Any copyright is dedicated to the Public Domain.
     http://creativecommons.org/publicdomain/zero/1.0/
-->
<meta charset="utf-8">
<title>Table grid items with padding-top, percentage height, and box-sizing:content-box, don't grow on incremental relayout</title>
<link rel="author" href="mailto:mats@mozilla.com">
<link rel="author" href="mailto:emilio@crisal.io">
<link rel="author" href="mailto:tlin@mozilla.com">
<link rel="author" href="https://mozilla.org">
<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1521088">
<link rel="match" href="table-grid-item-dynamic-003-ref.html">
<style>
html,body {
  color:black; background-color:white; font:16px/1 monospace; padding:0; margin:0;
}

div {
  display: grid;
  height: 100px;
  background-color: lime;
}

table {
  padding-top: 100px;
  height: 100%;
  box-sizing: content-box;
  background-color: yellow;
}
</style>

<div>
  <table>
    <thead>
      <tr>
        <th>Relayout shouldn't grow this table</th>
      </tr>
    </thead>
  </table>
</div>
<script>
onload = function() {
  let grid = document.querySelector("div");
  grid.getBoundingClientRect();
  document.body.style.width = "50vw";
  grid.getBoundingClientRect();
  document.body.style.width = "";
}
</script>