Run this code: document.body.style.gridTemplate = "'s1' [l1] [l2] 's2'"; document.body.style.gridTemplateRows; WebKit returns "auto [l1] [l2] auto", which is invalid syntax because, unlike grid-template, grid-template-rows does not accept adjacent <line-names>. It should return "auto [l1 l2] auto", like Firefox and Chromium do.
Created attachment 400197 [details] Patch
Comment on attachment 400197 [details] Patch r=me, thanks for the fix
Committed r262130: <https://trac.webkit.org/changeset/262130> All reviewed patches have been landed. Closing bug and clearing flags on attachment 400197 [details].
<rdar://problem/63604814>