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        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - [css-grid] Implementing baseline positioning for grid containers"
   href="https://bugs.webkit.org/show_bug.cgi?id=165063">165063</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>[css-grid] Implementing baseline positioning for grid containers
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>WebKit
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>WebKit Nightly Build
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>Unspecified
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>Unspecified
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>Normal
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>P2
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>Layout and Rendering
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>webkit-unassigned&#64;lists.webkit.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>jfernandez&#64;igalia.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>simon.fraser&#64;apple.com
          </td>
        </tr></table>
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        <pre>The spec says:

<a href="https://drafts.csswg.org/css-grid/#grid-baselines">https://drafts.csswg.org/css-grid/#grid-baselines</a>
&quot;The first (last) baselines of a grid container are determined as follows:

If any of the grid items whose areas intersect the grid container’s first (last) row participate in baseline alignment, the grid container’s baseline set is generated from the shared alignment baseline of those grid items.
Otherwise, if the grid container has at least one grid item whose area intersects the first (last) row, the grid container’s first (last) baseline set is generated from the alignment baseline of the first (last) such grid item (in grid order). If the item has no alignment baseline in that axis, then one is first synthesized from its border edges.
Otherwise, the grid container has no first (last) baseline set, and one is synthesized if needed according to the rules of its alignment context.&quot;</pre>
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