Either email addresses are anonymous for this group or you need the view member email addresses permission to view the original message to blin...@chromium.org, Hayato Ito, Takayoshi Kochi, taba...@chromium.org Contact emails fer...@chromium.org, taba...@chromium.org Explainer ::part and ::theme explainer Design doc/Spec https://drafts.csswg.org/css-shadow-parts/ Spec is solid on semantics of ::pa