CSS ident() verification doc

Fundamentals (css/css-values)

• ident-function-parsing.html
• ident-function-computed.html

Parse checks (@supports)

• supports view-transition-name: foo
• ident() is invalid
• ident(myident) is valid
• ident(3 "myident") is valid
• ident(rgb(...)) is invalid
• ident(5px) is invalid

Computed value checks (JS)

• ident("myident" 3) -> myident3
• ident(-- myident) -> --myident
• ident("--myident" random(element-shared, 0, 5)) on view-transition-name
• ident("--myident" random(element-shared, 0, 5)) on container-name