https://drafts.csswg.org/css-display/#the-display-properties `<display-listitem>` is defined as `<display-outside>? && [ flow | flow-root ]? && list-item` Currently WebKit only supports `display: list-item` but according to the spec, other forms should be supported: display: block list-item (= display: list-item) display: inline list-item display: block flow list-item (= display: list-item) display: inline flow list-item display: block flow-root list-item display: inline flow-root list-item display: flow list-item display: flow-root list-item
<rdar://problem/76891894>