css/css-tables/tentative/table-fixed-minmax.html

<!doctype html>
<title>Table minmax tricks</title>
<script src='/resources/testharness.js'></script>
<script src='/resources/testharnessreport.js'></script>
<link rel="author" title="Aleks Totic" href="atotic@chromium.org" />
<link rel="help" href="https://www.w3.org/TR/css-tables-3/" />
<style>
  main table {
   table-layout:fixed;
   width: 100%;
   background: #ddd;
   border-spacing: 0;
  }
  main td {
    padding: 0;
  }
</style>
<h1>Infinite intrinsic table widths</h1>
<p>Originally, algorithm for computing intrinsic table inline size had a special case: <br>
  If table is fixed, and has a width:%, its intrinsic inline size was "infinite". <br>
This ensured that fixed table with 100% width inside block layout would expand to container's width. </p>
<p>Different containers do not have reasonable handling of intrinsic infinitely sized
children. For those, table's intrinsic size should never be infinite, but instead
default to regular max size.</p>

<main>
<h3>Flexbox</h3>

<p>flex width:auto</p>
<div id="flextest" style="display:flex;">
  <table>
    <td>flex</td>
  </table>
  <div style="width:98px;border:1px solid black;flex-shrink:0">flex div</div>
</div>

<p>flex width:max-content</p>
<div id="flextest_max" style="display:flex;width:max-content">
  <table>
    <td><div style="width:100px">flex</div></td>
  </table>
  <div style="width:100px;border:1px solid black;flex-shrink:0">flex div</div>
</div>

<h3>Grid</h3>
<p>grid width:auto</p>
<div id="grid" style="display:grid;grid-template-columns: 1fr;width:auto">
  <table>
    <td><div style="width:100px">grid</div></td>
  </table>
</div>
<p>grid width:max-content</p>
<div id="grid_max" style="display:grid;grid-template-columns: 1fr;width:max-content">
  <table>
    <td><div style="width:100px">grid</div></td>
  </table>
</div>

<h3>Table</h3>
<table id="table_container" style="table-layout:auto;width:auto; background: #aaa;">
  <tr>
    <td>
      <table>
        <td><div style="width:100px">table</div></td>
      </table>
    </td>
  </tr>
</table>

<h3>Absolute</h3>
<div id="absolute" style="width:400px;height:100px;outline:solid 1px green;position:relative">
  <table style="position:absolute;right:0;top:0">
    <td>absolute</td>
  </table>
</div>

<script>
  test(_ => {
    let flexbox = document.querySelector("#flextest");
    let table = flexbox.querySelector("table");
    let div = flexbox.querySelector("div");
    assert_equals(div.offsetWidth, 100);
    assert_equals(flexbox.offsetWidth, document.body.offsetWidth);
    assert_equals(flexbox.offsetWidth, table.offsetWidth + div.offsetWidth);
  }, "table's width inside flexbox width:auto is not infinite");

  test(_ => {
    let flexbox = document.querySelector("#flextest_max");
    let table = flexbox.querySelector("table");
    assert_greater_than(table.offsetWidth, document.body.offsetWidth);
  }, "table's width inside flexbox width:max-content is infinite");

  test(_ => {
    let grid = document.querySelector("#grid");
    let table = grid.querySelector("table");
    assert_equals(grid.offsetWidth, document.body.offsetWidth);
    assert_equals(grid.offsetWidth, table.offsetWidth);
  }, "table's width inside grid width:auto is not infinite");

  test(_ => {
    let grid = document.querySelector("#grid_max");
    let table = grid.querySelector("table");
    assert_greater_than(table.offsetWidth, document.body.offsetWidth);
  }, "table's width inside grid width:max-content is infinite");

  test(_ => {
    let table = document.querySelector("#table_container");
    assert_equals(table.offsetWidth, document.body.offsetWidth);
  }, "table's width inside a table cell is infinite");

  test(_ => {
    let abs = document.querySelector("#absolute");
    let table = abs.querySelector("table");
    assert_equals(table.offsetWidth, abs.offsetWidth);
  }, "table's width inside an absolute block is infinite");

</script>