+++ This bug was initially created as a clone of Bug #1715661 +++ User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.77 Safari/537.36 Steps to reproduce: Load attached file. Actual results: The item in the justify-content:left flexbox (top one) is justified to the right. The item in the justify-content: right flexbox (bottom one) is justified to the left. Expected results: justify-content should be obeyed in a vertical writing mode column flexbox. https://drafts.csswg.org/css-align-3/#valdef-justify-content-left talks about aligning to the physical left/right edges if possible. There's a note about column flex containers, but I'm fairly confident it only applies to column flex containers in _horizontal_ writing modes. The note was added in response to https://github.com/w3c/csswg-drafts/issues/2991, which explicitly called out horizontal writing modes.
Bug 1744895 Comment 0 Edit History
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+++ This bug was initially created as a clone of Bug #1715661 +++ My patch in bug 1715661 is not complete. `justify-content:left/right` in vertical row-oriented flexbox maps to the wrong side. For abspos children under flexbox, we failed this test https://wpt.live/css/css-flexbox/abspos/flex-abspos-staticpos-justify-content-vertWM-002.html