There's no documentation for this item.

Source Code

# File action_view/helpers/form_helper.rb, line 476
def to_input_field_tag(field_type, options = {})
  options = options.stringify_keys
  options["size"] = options["maxlength"] || DEFAULT_FIELD_OPTIONS["size"] unless options.key?("size")
  options = DEFAULT_FIELD_OPTIONS.merge(options)
  if field_type == "hidden"
    options.delete("size")
  end
  options["type"] = field_type
  options["value"] ||= value_before_type_cast(object) unless field_type == "file"
  add_default_name_and_id(options)
  tag("input", options)
end