These pseudo classes are recognized by the parser, and have been identified as not being applicable in a Beautiful Soup environment. While the pseudo-classes will parse correctly, they will not match anything. This is because they cannot be implemented outside a live, browser environment. If at any time these are dropped from the CSS spec, they will simply be removed.
Selects active elements.
:current selects the element, or an ancestor of the element, that is currently being displayed. The functional form of
:current() takes a compound selector list.
Represents an an element that has received focus.
Selects an element that matches
:focus and the user agent determines that the focus should be made evident on the element.
Selects an element that has received focus or contains an element that has received focus.
Selects an element that is defined to occur entirely after a
:host selects the element hosting a shadow tree. While the function form of
:host() takes a complex selector list and matches the shadow host only if it matches one of the selectors in the list.
Selects the element hosting shadow tree, but only if one of the element's ancestors match a selector in the selector list.
Selects an element when the user interacts with it by hovering over it with a pointing device.
Selects link (every
<area> element with an
href attribute) elements whose absolute URL matches the element’s own document URL.
Selects an element that is defined to occur entirely prior to a
Selects an element that is capable of being played or paused (such as an audio, video, or similar resource) and is currently "paused".
Selects an element that is capable of being played or paused (such as an audio, video, or similar resource) and is currently "playing".
Selects a unique element (the target element) with an id matching the URL's fragment.
Selects a unique element with an id matching the URL's fragment or an element which contains the element.
Selects an element with incorrect input, but only after the user has significantly interacted with it.
Selects links that have already been visited.