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<!DOCTYPE bugzilla SYSTEM "https://bugs.webkit.org/page.cgi?id=bugzilla.dtd">

<bugzilla version="5.0.4.1"
          urlbase="https://bugs.webkit.org/"
          
          maintainer="admin@webkit.org"
>

    <bug>
          <bug_id>307255</bug_id>
          
          <creation_ts>2026-02-07 17:44:10 -0800</creation_ts>
          <short_desc>Remove `display: inline-grid-lanes` if CSSWG changes resolution again</short_desc>
          <delta_ts>2026-02-09 12:22:34 -0800</delta_ts>
          <reporter_accessible>1</reporter_accessible>
          <cclist_accessible>1</cclist_accessible>
          <classification_id>1</classification_id>
          <classification>Unclassified</classification>
          <product>WebKit</product>
          <component>CSS</component>
          <version>WebKit Nightly Build</version>
          <rep_platform>Unspecified</rep_platform>
          <op_sys>Unspecified</op_sys>
          <bug_status>NEW</bug_status>
          <resolution></resolution>
          
          
          <bug_file_loc></bug_file_loc>
          <status_whiteboard></status_whiteboard>
          <keywords>InRadar</keywords>
          <priority>P2</priority>
          <bug_severity>Normal</bug_severity>
          <target_milestone>---</target_milestone>
          
          
          <everconfirmed>1</everconfirmed>
          <reporter name="Oriol Brufau">obrufau</reporter>
          <assigned_to name="Nobody">webkit-unassigned</assigned_to>
          <cc>ahmad.saleem792</cc>
    
    <cc>brandonstewart</cc>
    
    <cc>fantasai.bugs</cc>
    
    <cc>jensimmons</cc>
    
    <cc>koivisto</cc>
    
    <cc>webkit-bug-importer</cc>
          

      

      

      

          <comment_sort_order>oldest_to_newest</comment_sort_order>  
          <long_desc isprivate="0" >
    <commentid>2179124</commentid>
    <comment_count>0</comment_count>
    <who name="Oriol Brufau">obrufau</who>
    <bug_when>2026-02-07 17:44:10 -0800</bug_when>
    <thetext>See https://github.com/w3c/csswg-drafts/issues/10961#issuecomment-3720021476

&gt; RESOLVED: remove inline-grid-lanes for now, but we are open to adding it again if there is evidence it solves a problem

Note another resolution (https://github.com/w3c/csswg-drafts/issues/10961#issuecomment-3820508516) reverted the former, but the latter got a formal objection (https://github.com/w3c/csswg-drafts/issues/10961#issuecomment-3829784658).

So the former resolution stands: the `display: inline-grid-lanes` should be removed, in favor of `display: inline grid-lanes`.</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>2179234</commentid>
    <comment_count>1</comment_count>
    <who name="Radar WebKit Bug Importer">webkit-bug-importer</who>
    <bug_when>2026-02-08 14:43:26 -0800</bug_when>
    <thetext>&lt;rdar://problem/169929742&gt;</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>2179240</commentid>
    <comment_count>2</comment_count>
    <who name="Tim Nguyen (:ntim)">ntim</who>
    <bug_when>2026-02-08 14:52:41 -0800</bug_when>
    <thetext>Removing parsing support is easy, the harder part to keep round-tripping and serialization sane. WebKit can&apos;t serialize `display` to multiple values with the current setup. It&apos;s not terribly hard to make that supported, but it is more than just removing the value.</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>2179252</commentid>
    <comment_count>3</comment_count>
    <who name="Oriol Brufau">obrufau</who>
    <bug_when>2026-02-08 15:19:13 -0800</bug_when>
    <thetext>Maybe it helps for reference, https://chromium-review.googlesource.com/c/chromium/src/+/2421598 is the patch that added `block math` in Blink, its first display value that can&apos;t be expressed as a single keyword.</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>2179538</commentid>
    <comment_count>4</comment_count>
    <who name="Jen Simmons">jensimmons</who>
    <bug_when>2026-02-09 12:22:34 -0800</bug_when>
    <thetext>Currently, the CSSWG has resolved to keep `display: inline-grid-lanes`.

https://github.com/w3c/csswg-drafts/issues/10961#issuecomment-3820508516

There are still people who believe this is the wrong decision, so the debate will likely continue.</thetext>
  </long_desc>
      
      

    </bug>

</bugzilla>