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<link rel="author" title="Joy Yu" href="mailto:[email protected]">
<link rel="help" href="https://drafts.csswg.org/css-tables-3/#computing-the-table-height">
<link rel="help" href="https://www.w3.org/TR/2017/WD-css-tables-3-20170307/#visible-track">
<style>
x-table {
border: 5px solid black;
}
x-table span {
display: inline-block;
vertical-align: top;
background: lime;
margin: 3px;
height: 100px;
width: 100px;
}
</style>
<main>
<h1>Visibility collapse</h1>
<a href="https://drafts.csswg.org/css-tables-3/#computing-the-table-height">Spec</a>
<p>
Collapsing a row group but making its rows visible should still result in a
collapsed row group.
</p>
<x-table id="one">
<x-tbody>
<x-tr>
<x-td>
<span>row 1</span>
</x-td>
<x-td>
<span></span>
</x-td>
</x-tr>
<x-tr>
<x-td>
<span>row 2</span>
</x-td>
<x-td>
<span></span>
</x-td>
</x-tr>
</x-tbody>
<x-tr id="thirdRowRef">
<x-td>
<span>row 3</span>
</x-td>
<x-td>
<span></span>
</x-td>
</x-tr>
</x-table>
When row group is collapsed, visible rows within the row group are still collapsed and therefore invisible.
<x-table id="two">
<x-tbody style="visibility:collapse;">
<x-tr style="visibility:visible;" id="firstRow">
<x-td>
<span>row 1</span>
</x-td>
<x-td>
<span></span>
</x-td>
</x-tr>
<x-tr style="visibility:visible;" id="secondRow">
<x-td>
<span>row 2</span>
</x-td>
<x-td>
<span></span>
</x-td>
</x-tr>
</x-tbody>
<x-tr id="thirdRow">
<x-td>
<span>row 3</span>
</x-td>
<x-td>
<span></span>
</x-td>
</x-tr>
</x-table>
</main>
<script>
tests = [
[
document.getElementById('two').offsetWidth,
document.getElementById('one').offsetWidth,
"row group visibility:collapse doesn't change table width"
],
[
document.getElementById('two').offsetHeight,
116,
"row group visibility:collapse changes table height"
],
[
document.getElementById('firstRow').offsetHeight,
0,
"the first row should be collapsed"
],
[
document.getElementById('secondRow').offsetHeight,
0,
"the second row should be collapsed"
],
[
document.getElementById('thirdRow').offsetHeight,
document.getElementById('thirdRowRef').offsetHeight,
"the third row stays the same"
]];
for (i = 0; i< tests.length; i++) {
test(function()
{
assert_equals.apply(this, tests[i]);
},
tests[i][2]);
};
</script>
</html>
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