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sousa-gecko/testing/web-platform/tests/css/css-tables/insert-after-col.html
T
Emilio Cobos Álvarez 9f8191aba1 Bug 2033384 - Tweak colgroup child suppression. r=layout-reviewers,dshin
This code comes all the way back from bug 480979.

What happens here is as follows:

 * There are two table-column items, with their relevant anonymous
   wrapper. Why the page uses `display: table-column` for this escapes
   my understanding.
 * We insert the header next to them. We compute the parent frame to be
   the (anonymous) nsTableColumnGroup frame, because it's our sibling's
   parent.
 * We decide you're not a column, and thus you get suppressed. We don't
   create FrameConstructionItems for it.
 * We don't realize in WipeContainingBlock that things went wrong, and
   fail miserably.

Fortunately we can tweak this to perform the suppression later in the
pipeline.

Differential Revision: https://phabricator.services.mozilla.com/D295265
2026-04-21 14:09:33 +00:00

32 lines
888 B
HTML

<!doctype html>
<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=2033384">
<link rel="help" href="https://drafts.csswg.org/css-tables/#content-model">
<link rel="match" href="insert-after-col-ref.html">
<title>Insertion of a block after a display:table-column element</title>
<style>
.hide-desktop {
width: 0 !important;
height: 0 !important;
padding: 0 !important;
visibility: hidden !important;
margin: 0 !important;
display: table-column !important;
background: 0 !important;
content-visibility: hidden;
overflow: hidden !important;
}
.header {
height: 100px;
background-color: green;
}
</style>
<div id="container">
<div class="hide-desktop">Something something</div>
</div>
<script>
container.getBoundingClientRect();
let header = document.createElement("div");
header.className = "header";
container.appendChild(header);
</script>