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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED - [meta][css-grid] Support implicit grid before explicit grid"
href="https://bugs.webkit.org/show_bug.cgi?id=153488">153488</a>
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<th>Summary</th>
<td>[meta][css-grid] Support implicit grid before explicit grid
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<th>Classification</th>
<td>Unclassified
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<th>Product</th>
<td>WebKit
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<th>Version</th>
<td>WebKit Nightly Build
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<th>Hardware</th>
<td>Unspecified
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<th>OS</th>
<td>Unspecified
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<th>Status</th>
<td>ASSIGNED
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<th>Severity</th>
<td>Normal
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<th>Priority</th>
<td>P2
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<th>Component</th>
<td>Layout and Rendering
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<th>Assignee</th>
<td>webkit-unassigned@lists.webkit.org
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<th>Reporter</th>
<td>rego@igalia.com
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<th>CC</th>
<td>simon.fraser@apple.com
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<th>Blocks</th>
<td>60731
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<pre>In our current implementation the implicit grid is only after the explicit grid.
For example, in a 2x2 grid, if you have an item with:
grid-row: 3;
An implicit 3rd row is created.
However, if you have an item like:
grid-column: -4;
We should be creating an implicit column before the first one.
This has been already implemented on Blink (<a href="http://crbug.com/444011">http://crbug.com/444011</a>)
following a plan described in this document (<a href="http://bit.ly/1j3CRdi">http://bit.ly/1j3CRdi</a>).
We should port these patches to WebKit as the grid layout code has the same issues.
This will be used as meta-bug for all the patches related.
More info in the spec: <a href="http://dev.w3.org/csswg/css-grid/#line-placement">http://dev.w3.org/csswg/css-grid/#line-placement</a></pre>
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