none: CSSKeywordValue none
block: CSSKeywordValue block
inline: CSSKeywordValue inline
inline-flex: CSSKeywordValue inline-flex
table-row: CSSKeywordValue table-row
table-cell: CSSKeywordValue table-cell
inline math: CSSKeywordValue math
block flow: CSSKeywordValue block
block flex: CSSKeywordValue flex
inline flow list-item: CSSStyleValue inline list-item