optgroup {html5}

Generate the <optgroup> HTML tag.

Description

The <optgroup> HTML element creates a grouping of options within a select element.

Usage

optgroup(
  ...,
  attr = NULL,
  separate = FALSE,
  collapse = "",
  formatted = html5_vars$formatted
)

Arguments

...

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

Details

Learn more at https://developer.mozilla.org/en-US/docs/Web/HTML/Element/optgroup.

Value

A HTML tag string.

Examples

optgroup(attr = list(class = "test"))