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May Baseline digest: container style queries and the :open pseudo-class
The May edition moves container style queries, the :open pseudo-class for dialog and details, ToggleEvent.source, image-rendering, text-decoration-skip-ink: all, and SharedWorker into newly available. The lh and rlh units, Navigator.userActivation, clip-path, and :user-invalid became widely available. Most of it takes work off JavaScript: state that used to be tracked in a script now has a selector of its own, and a component can finally read a custom property from its parent. Check the exact status for your own audience before you ship, because newly available and widely available are not the same thing.
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