layout: Lay out collapsed table rows and columns, but don't paint them

mrobinson · servo-wpt-sync · commit ef5ef5e2aa57 · 2025-09-01T16:52:02.000+02:00
It's expected that script queries be able to interact with collapsed
table rows and columns, so this change starts laying them out. They
still do not affect table dimensions, nor are they painted.

This does not fix all interaction with collapsed rows and columns. For
instance, setting scroll offsets of contained scrolling nodes does not
work properly. It does fix the panic though, which is the most important
thing.

Signed-off-by: Martin Robinson &lt;mrobinson@igalia.com&gt;
diff --git a/css/css-tables/table-collapsed-row-or-column-crash.html b/css/css-tables/table-collapsed-row-or-column-crash.html
@@ -0,0 +1,22 @@
+<!DOCTYPE html>
+
+<link rel="help" href="https://github.com/servo/servo/issues/37421">
+
+<div style="display: table; visibility: collapse">
+  <div id="scroller" style="overflow: scroll"></div>
+</div>
+
+<table>
+    <colgroup>
+        <col style="background: green; visibility: collapse">
+    </colgroup>
+    <tr>
+        <td><div id="scroller2" style="overflow: scroll"></div></td>
+    </tr>
+</table>
+
+<script>
+    scroller.scrollTo();
+    scroller2.scrollTo();
+</script>
+
