R包/函数-为函数参数添加黄色注释框

Question

I am dabbling around writing my first R-package, and was wondering how one can add those yellow comment boxes that pop up when you hover over the function argument (when you've hit tab in the function). See here:

This is my code:

#' A web function
#'
#' This function allows you to call a website.
#' @param url put in a url
#' @keywords web
#' @export
#' @examples
#' webpage("google")

webpage <- function(url){
    if(!is.character(url)){
       url <- as.character(url)
} else{
     utils::browseURL(paste0("https://www.", url, ".com", collapse = ","))
  }
}

I use devtools with roxygen2 to document and build the package - all the files are there, and the package/function works once installed and loaded. The only thing is that the comment, #' @param url put in a url , I wrote does not show up as a yellow box.

Any idea(s) what the problem might be?

Answer 1

The issue resolved itself...apparently, when you have a function with several arguments, you get a list of said arguments, as in the picture above. When there is only one argument, then you have to start typing the argument and use code completion to bring up the list. Then, when you hover over the 'url' argument, it shows the yellow description box...