Shadow partsThe part and exportparts HTML attributes expose elements of a shadow DOM as named parts, which can be selected by the ::part() CSS pseudo-element for styling.selectorsSelectorswidely2020-07-282023-01-28https://drafts.csswg.org/css-shadow-1/#exposinghttps://developer.mozilla.org/docs/Web/API/Element/partapi.Element.partcss.selectors.parthtml.global_attributes.exportpartshtml.global_attributes.parthttps://nowyoucanuse.com/features--shadow-parts.html