format(view_path = [])
public
Returns the MIME type for the format
used in the request.
GET /posts/5.xml | request.format => Mime[:xml]
GET /posts/5.xhtml | request.format => Mime[:html]
GET /posts/5 | request.format => Mime[:html] or Mime[:js], or request.accepts.first
# File actionpack/lib/action_dispatch/http/mime_negotiation.rb, line 65
def format(view_path = [])
formats.first || Mime::NullType.instance
end