- ...
- A string or vector of content to pass to the tag. 
- attr
- A named list or named vector, names are attribute names and values are attribute values. 
- separate
- TRUE/FALSE, If TRUE, returns separate tags for each item of ...; if FALSE, returns one tag with the items of ... in the tag content. 
- collapse
- A string. If NULL, returns a vector the same length as ... instead of collapsing the tags into one string. 
- formatted
- TRUE/FALSE, if TRUE, HTML will be generated with indents and new lines for readability at the cost of performance. Controlled by setting the environment variable html5_vars$formatted <- TRUE/FALSE