css/css-grid/alignment/grid-baseline-001.html

<!DOCTYPE html>
<html>
<title>CSS Grid: Grid container baseline</title>
<link rel="author" title="Javier Fernandez" href="mailto:jfernandez@igalia.com">
<link rel="help" href="https://drafts.csswg.org/css-grid/#grid-baselines">
<link rel="help" href="https://crbug.com/234191">
<link rel="match" href="references/grid-baseline-001-ref.html">
<meta name="assert" content="Check the first baselines of a grid container."/>

<style>
body {
    margin: 0;
}
.inline-grid {
    display: inline-grid;
    background-color: lightgrey;
    margin-top: 5px;
    grid-auto-flow: column;
}
.grid {
    display: grid;
    background-color: grey;
    margin-top: 10px;
    grid-auto-flow: column;
}
.empty {
    border-style: solid;
    border-width: 5px 0px 10px;
    padding: 2px 0px 4px;
    margin: 10px 0px 20px;
}
.column {
    grid-auto-flow: row;
}
.firstRowFirstColumn {
    grid-column: 1;
    grid-row: 1;
}
.secondRowFirstColumn {
    grid-column: 1;
    grid-row: 2;
}
</style>

<body style="position: relative">

<!-- If any of the grid items whose areas intersect the grid container's first
row/column participate in baseline alignment, the grid container's baseline is
the baseline of those grid items. -->
<div>
before text
<div class="inline-grid" style="grid-auto-rows: 50px;">
    <div style="align-self: end">below</div>
    <div style="align-self: baseline; margin-top: 15px">baseline</div>
    <div style="align-self: start">above</div>
</div>
after text
</div>

<!-- This grid has a baseline item, it's orthogonal but it still participates
in baseline alignment. -->
<div>
before text
<div class="inline-grid" style="grid-auto-rows: 40px">
    <div style="align-self: end">below</div>
    <div style="align-self: baseline; margin-top: 20px; writing-mode: vertical-rl"></div>
    <div style="align-self: start">above</div>
</div>
after text
</div>

<div>
before text
<div class="inline-grid">
    <h2>h2 baseline</h2>
    <div>above</div>
</div>
after text
</div>

<div>
before text
<div class="inline-grid">
    <div>baseline</div>
    <h2>h2 below</h2>
</div>
after text
</div>

<!-- If the first grid item has an orthogonal baseline, use the synthesized
baseline (bottom of the content box of the first item). -->
<div>
should align with the middle
<div class="inline-grid" style="width: 40px; height: 40px">
    <div style="writing-mode: vertical-rl; height: 20px; width: 40px; border-bottom: 1px solid black"></div>
</div>
of the grey box
</div>

<!-- If there are no griditems, align to the bottom of the margin box. -->
<div>
should align below the bottom
<div class="empty inline-grid" style="width: 30px; height: 30px">
</div>
of the black line
</div>

<div>
should align with the bottom
<div class="inline-grid" style="width: 40px; height: 40px;">
    <div style="width: 20px; height: 20px; border: 5px solid black; background: red;"></div>
</div>
of the red box
</div>

<!-- column-axis test cases. -->
<div>
before text
<div class="inline-grid column">
    <div>baseline</div>
    <div>below</div>
</div>
after text
</div>

<!-- If the first grid item has an orthogonal baseline, use the synthesized
baseline (bottom of the border box of the first item). -->
<div>
should align with the middle
<div class="inline-grid column" style="width: 40px; height: 40px;">
    <div style="writing-mode: vertical-rl; width: 40px; height: 20px; border-bottom: 1px solid black"></div>
    <div style="writing-mode: vertical-rl; width: 40px; height: 19px"></div>
</div>
of the grey box
</div>

<!-- More tests on the right side of the page. -->
<div style="position: absolute; top: 0; left: 400px; width: 360px">

<!-- Ignore absolutely positioned grid items. -->
<div>
before text
<div class="inline-grid">
    <div style="position: absolute">absolute</div>
    <div style="margin-top: 30px">baseline</div>
</div>
after text
</div>

<!-- We don't participate in baseline alignment if there's an auto margin. -->
<div>
before text
<div class="inline-grid" style="grid-auto-rows: 40px;">
    <div>baseline</div>
    <div style="align-self: baseline; margin-top: auto">below</div>
</div>
after text
</div>

<div>
before text
<div style="display: inline-block">
<div class="inline-grid" style="height: 40px;">
    <div>above</div>
    <div style="align-self: baseline; margin-top: 10px">baseline</div>
    <div>above</div>
</div>
after
</div>
text
</div>

<!-- The spec is a little unclear what should happen here. For now,
align to the last line box. -->
<div>
    before text
    <div style="display: inline-block">
        <div class="grid" style="height: 30px;">
            baseline
        </div>
    </div>
    after text
</div>

<table style="background-color: lightgrey; margin-top: 5px">
<tr style="height: 50px">
  <td style="vertical-align: bottom">bottom</td>
  <td style="vertical-align: baseline">baseline</td>
  <td style="vertical-align: top">top</td>
  <td style="vertical-align: baseline"><div class="grid">
    <h2>h2 baseline</h2>
    <div>above</div>
  </div></td>
</table>

<!-- If a box contributing a baseline has a scrollbar, the box must be treated
as being in its initial scroll position when computing the baseline. -->
<div>
before text
<div id="grid-with-scrollbar" class="inline-grid" style="height: 65px; width: 150px">
    <div id="griditem-with-scrollbar" style="align-self: baseline; padding-top: 15px; height: 50px; overflow-y: scroll;">
        The baseline is based on<br>
        the non-scrolled position;<br>
        this won't line up.
    </div>
</div>
after text
</div>

</div>

<script>
document.getElementById("griditem-with-scrollbar").scrollTop = 999;
document.getElementById("grid-with-scrollbar").style.width = "auto";
</script>

</body>
</html>