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conformance · v132

v132 · sideways-writing-modes — conformance probe

6 assertions drawn from the spec. Each is a single contract the spec text makes. Pass/fail reflects what this browser executed; blocked means the contract was not run because it needs user mediation, hardware, or another unavailable precondition. Open the page in Chrome stable / canary / Firefox / Safari to compare.

browser: spec: https://drafts.csswg.org/css-writing-modes/#propdef-writing-mode chromestatus: #6201053052928000 generated 2026-06-01T08:16:30Z by conformance-author-v1-subagent
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pass
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fail
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blocked
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id contract kind verdict detail
writing-mode-sideways-rl-supported writing-mode accepts the sideways-rl keyword. spec ↗ css-supports
writing-mode-sideways-lr-supported writing-mode accepts the sideways-lr keyword. spec ↗ css-supports
writing-mode-vertical-rl-still-supported The pre-existing vertical-rl mode still parses; the sideways modes are added alongside it, not as a replacement. css-supports
writing-mode-vertical-lr-still-supported The pre-existing vertical-lr mode still parses. css-supports
writing-mode-sideways-computed Setting writing-mode:sideways-lr via CSSOM round-trips through getComputedStyle. spec ↗ script
writing-mode-sideways-rejects-unknown writing-mode does not accept an arbitrary identifier like sideways-tb. script