4.90 - [if] Built-In
Mnemonic aid: if for IF match
See also: [else]
If there is no style, and value and match are identical, the conditionalContent will be emitted. If there is a style, the style is only evaluated if value and match are identical. In that case, the content is passed to the style, and the style is responsible for emitting it. sep= defaults to a space.
[if this this that][else this this theother]
[if this what that][else this what theother]
Other built-ins used here: [else]