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[css-position][css-tables] Need to define relative positioning on table cells, rows and row groups in collapsing border model #11515

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Loirooriol opened this issue Jan 16, 2025 · 0 comments
Open

[css-position][css-tables] Need to define relative positioning on table cells, rows and row groups in collapsing border model #11515

Loirooriol opened this issue Jan 16, 2025 · 0 comments
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css-position-3 Current Work css-tables-3 Current Work

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@Loirooriol
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Loirooriol commented Jan 16, 2025 •
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https://drafts.csswg.org/css-position/#relpos-insets
https://drafts.csswg.org/css-tables/#border-collapsing

<!DOCTYPE html>
<style>td { border: 10px solid rgba(0, 0, 0, 0.5); background: cyan }</style>
<table style="border-collapse: collapse">
  <td>A</td><td>B</td>
</table>
<table style="border-collapse: collapse">
  <td>A</td><td style="position: relative; left: 0">B</td>
</table>
<table style="border-collapse: collapse">
  <td>A</td><td style="position: relative; left: 50px">B</td>
</table>
<table style="border-collapse: collapse">
  <tr style="position: relative; left: 50px">
    <td>A</td><td>B</td>
  </tr>
</table>
<table style="border-collapse: collapse">
  <tbody style="position: relative; left: 50px">
    <td>A</td><td>B</td>
  </tbody>
</table>
Gecko Blink WebKit

It's surprising to say at least that adding position: relative on a cell shrinks the background area...
@Loirooriol Loirooriol added css-position-3 Current Work css-tables-3 Current Work labels Jan 16, 2025
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