[csswg-drafts] [css-tables][css-shadow] shadow of a row in the context of a rowspan (#13455)

karlcow has just created a new issue for https://github.com/w3c/csswg-drafts:

== [css-tables][css-shadow] shadow of a row in the context of a rowspan ==
When diving into the multiple possible cases of a shadow for a table row. There is an interesting case on the meaning/relations of row to the shadow.

See this testcase in Firefox and Chrome. Specifically testcase 7 (on WebKit it is not yet rendered).
https://bug-74156-attachments.webkit.org/attachment.cgi?id=478256

<img width="403" height="394" alt="Image" src="https://github.com/user-attachments/assets/f1e7b39f-5a90-4547-a689-46c7bc85a3e0" />


```
<style>
  .shadow-black {
    box-shadow: 0 0 50px #000;
  }
</style>
<table>
  <tr class="shadow-black">
    <td rowspan="2">Rowspan 2</td>
    <td>R1, C2</td>
    <td>R1, C3</td>
  </tr>
  <tr>
    <td>R2, C2</td>
    <td>R2, C3</td>
  </tr>
</table>
```

Some questions, we could have.

1. Should the shadow be around the two spanned row cells instead of just the first one?
2. What is happening in the multicolor case. aka how the shadow is punching through? (see test 12) 


<img width="594" height="263" alt="Image" src="https://github.com/user-attachments/assets/b2e0b9a2-6808-4f37-b12f-9b6f3a83da23" />

Please view or discuss this issue at https://github.com/w3c/csswg-drafts/issues/13455 using your GitHub account


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Received on Thursday, 5 February 2026 03:07:01 UTC