mozilla-central/testing/web-platform/tests/css/css-tables/tentative/td-box-sizing-001.html

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<!doctype html>
<title>TD box sizing</title>
<script src='/resources/testharness.js'></script>
<script src='/resources/testharnessreport.js'></script>
<script src="/resources/check-layout-th.js"></script>
<link rel="stylesheet" type="text/css" href="./support/table-tentative.css">
<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 {
background: gray;
border-spacing: 10px 10px;
table-layout: auto;
}
main td {
padding: 20px;
background: #BFB;
font-size: 10px;
box-sizing: border-box;
}
main td > div {
display: inline-block;
background: rgba(56,162,56,0.3);
}
</style>
<main>
<h1>TD and box sizing</h1>
<p>TD defaults to box-sizing: content-box. How does box-sizing affect final TD size?</p>
<ol>
<li>Auto table layout</li>
<ol>
<li>Percent cells ignore box-sizing, it is always border-box.</li>
<li>Fixed cells respect box-sizing.</li>
</ol>
<li>Fixed table layout</li>
<ol>
<li>Percent cells respect box sizing when computing cell width from assignable width.</li>
<li>Percent cells ignore box sizing when computing grid max from cell width.</li>
</ol>
</ol>
<h2>Table-layout: auto</h2>
<h4>TD width:%</h4>
<p class="testdesc">content-box, C0:50%/100 C1:Auto
Percent gets resolved to compute grid max size.
C0 max_width is max_width + 2 padding = 100 + 2*20 = 140
Table width is 1/50%*140 + 3*padding = 280+30 = 310
<table data-expected-width=310>
<tr>
<td style="width:50%;box-sizing:content-box" data-expected-width=140>
<div style="width:100px">50%/100</td>
<td data-expected-width=140>Auto</td>
</tr>
</table>
<p class="testdesc">border-box, C0:50%/100 C1:Auto
Same test as above, but box-sizing is border-box.
<table data-expected-width=310>
<tr>
<td style="width:50%;box-sizing:border-box" data-expected-width=140>
<div style="width:100px">50%/100</td>
<td data-expected-width=140>Auto</td>
</tr>
</table>
<p class="testdesc">content-box, C0:80%/100 C1:Auto
Percent gets resolved to compute final cell size from assignable width.
C0 border box width is 500 * 80%
<table style="width:530px" data-expected-width=530>
<tr>
<td style="width:80%;box-sizing:content-box" data-expected-width=400>
<div style="width:100px">80%/100</td>
<td data-expected-width=100>Auto</td>
</tr>
</table>
<p class="testdesc">border-box, C0:80%/100 C1:Auto
Same as above, but border-box
<table style="width:530px" data-expected-width=530>
<tr>
<td style="width:80%;box-sizing:border-box" data-expected-width=400>
<div style="width:100px">80%/100</td>
<td data-expected-width=100>Auto</td>
</tr>
</table>
<h4>TD width:fixed</h4>
<p class="testdesc">content-box, C0:100/Auto C1:100/Auto
Tests whether box-sizing affects how percentages are computed.
C0 max_width is max_width + 2 padding = 100 + 2*20 = 140
Table width is 1/50%*140 + 3*padding = 280+30 = 310
<table data-expected-width=310>
<tr>
<td style="width:100px;box-sizing:content-box" data-expected-width=140>100</td>
<td style="width:100px;box-sizing:content-box">100</td>
</tr>
</table>
<p class="testdesc">border-box, C0:100/Auto C1:100/Auto
Same test as above, but box-sizing is border-box.
<table data-expected-width=230>
<tr>
<td style="width:100px;box-sizing:border-box" data-expected-width=100>100</td>
<td style="width:100px;box-sizing:border-box" data-expected-width=100>100</td>
</tr>
</table>
<h4>TD height: fixed</h4>
<p class="testdesc">content-box, C0 height:100px
<table data-expected-height=160>
<tr>
<td style="height:100px;box-sizing:content-box" data-expected-height=140>100 height</td>
</tr>
</table>
<p class="testdesc">border-box, C0 height:100px
<table data-expected-height=120>
<tr>
<td style="height:100px;box-sizing:border-box" data-expected-height=100>100 height</td>
</tr>
</table>
<h2>Table-layout: fixed</h2>
<h4>TD width:%</h4>
<p class="testdesc">content-box, C0:50%/100 C1:Auto
Percent gets resolved to compute grid max size.
C0 max_width is max_width + 2 padding = 100 + 2*20 = 140
Table width is 1/50%*140 + 3*padding = 280+30 = 310
<table style="table-layout:fixed" data-expected-width=310>
<tr>
<td style="width:50%;box-sizing:content-box" data-expected-width=140>
<div style="width:100px">50%/100</td>
<td data-expected-width=140>Auto</td>
</tr>
</table>
<p class="testdesc">border-box, C0:50%/100 C1:Auto
Same test as above, but box-sizing is border-box.
<table style="table-layout:fixed" data-expected-width=310>
<tr>
<td style="width:50%;box-sizing:border-box" data-expected-width=140>
<div style="width:100px">50%/100</td>
<td data-expected-width=140>Auto</td>
</tr>
</table>
<p class="testdesc">content-box, C0:60%/100 C1:Auto
Percent gets resolved to compute final cell size from assignable width.
Assignable width is 530 - 3*10 = 500
C0 content box width is 500 * 60% + 40px padding = 340
C1 is 500 - 340 = 160
<p class="error">Legacy/Edge treat %ge TD as border box, and end up with 300px</p>
<table style="table-layout:fixed;width:530px" data-expected-width=530>
<tr>
<td style="width:60%;box-sizing:content-box" data-expected-width=340>
<div style="width:100px">60%/100</td>
<td data-expected-width=160>Auto</td>
</tr>
</table>
<p class="testdesc">border-box, C0:60%/100 C1:Auto
Same as above, but border-box
<table style="table-layout:fixed;width:530px" data-expected-width=530>
<tr>
<td style="width:60%;box-sizing:border-box" data-expected-width=300>
<div style="width:100px">80%/100</td>
<td data-expected-width=200>Auto</td>
</tr>
</table>
<h4>TD width:fixed</h4>
<p class="testdesc">content-box, C0:100/Auto C1:100/Auto
Tests whether box-sizing affects how percentages are computed.
C0 max_width is max_width + 2 padding = 100 + 2*20 = 140
Table width is 1/50%*140 + 3*padding = 280+30 = 310
<table style="table-layout:fixed" data-expected-width=310>
<tr>
<td style="width:100px;box-sizing:content-box" data-expected-width=140>100</td>
<td style="width:100px;box-sizing:content-box">100</td>
</tr>
</table>
<p class="testdesc">border-box, C0:100/Auto C1:100/Auto
Same test as above, but box-sizing is border-box.
<table style="table-layout:fixed" data-expected-width=230>
<tr>
<td style="width:100px;box-sizing:border-box" data-expected-width=100>100</td>
<td style="width:100px;box-sizing:border-box" data-expected-width=100>100</td>
</tr>
</table>
</main>
<script>
checkLayout("table");
</script>