Test List

https://wpt.fyi/results/css/css-inline/initial-letter?q=label%3Ainterop-2025-writingmodes&run_id=5098269317529600&run_id=6243616836288512&run_id=5168123953283072&run_id=6194076871557120

(total of 12 tests)

Rationale

Although these tests involve the writing-mode property, they are really tests for CSS initial-letter, which is not currently supported in all browsers (neither Firefox nor Safari support it). It's not the presence of writing-mode that causes them to fail.

The current failures seen in these browsers should be considered initial-letter failures rather than writing-mode failures.