HostThe :host CSS pseudo-class selects the containing element of the shadow tree in which it is used. The :host() CSS pseudo-class selects the that element only if it matches the provided selector.selectorsSelectorswidely2020-01-152022-07-15https://drafts.csswg.org/css-shadow-1/#host-selectorhttps://developer.mozilla.org/docs/Web/CSS/Reference/Selectors/:hostcss.selectors.hostcss.selectors.hostfunctionhttps://nowyoucanuse.com/features--host.html