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- This WPT test may be referenced by the following Test IDs:
- /css/CSS2/visudet/inline-block-baseline-015.html - WPT Dashboard Interop Dashboard
<!DOCTYPE html>
<title>Vertical-align: baseline of inline-block with phantom line box</title>
<link rel="author" title="Oriol Brufau" href="obrufau@igalia.com">
<link rel="match" href="../../reference/ref-filled-green-200px-square.html">
<meta name="assert" content="
> The baseline of an inline-block is the baseline of its last line box in the normal flow,
> unless it has either no in-flow line boxes or if its overflow property has a computed
> value other than visible, in which case the baseline is the bottom margin edge.
Here we have 2 inline-blocks. The 1st one is completely empty, so it baseline is its
bottom margin edge. The 2nd one has an empty span followed by a block.
The span would typically be placed in a line box. However, it's a phantom line box.
> Line boxes that contain no text, no preserved white space, no inline elements with
> non-zero margins, padding, or borders, and no other in-flow content (such as images,
> inline blocks or inline tables), and do not end with a preserved newline must be
> treated as zero-height line boxes for the purposes of determining the positions of
> any elements inside of them, and must be treated as not existing for any other purpose.
So for the purpose of finding the baseline of the 2nd inline-block we ignore the phantom
line box, and thus the baseline is also the bottom margin edge.
Therefore, the inline-blocks should have their bottom margin edges aligned.
">
<style>
.wrapper {
width: 200px;
background: red;
line-height: 0;
font-size: 0;
}
.green {
width: 100px;
height: 200px;
background: green;
}
.inline-block {
display: inline-block;
}
</style>
<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>
<div class="wrapper">
<div class="inline-block green"></div>
<div class="inline-block">
<span></span>
<div class="green"></div>
</div>
</div>