Tweaking cli::col_h1() styling

[olivroy]

I am wondering if it was possible to make this output with cli::cli_h1()

cli::cli_h1(cli::col_yellow("GP goodpractice"))

Almost does it, but it doesn't affect the line.

I tried playing with https://cli.r-lib.org/reference/themes.html#examples, but it doesn't really work.

I am wondering if docs could be enhanced generally for the id and class arguments. More examples on how to create custom theming of elements would be great!

I'd be happy to make some doc edits, but I can't figure out how things work at the moment..

Using cli::rule(left = "aa", right = "a", col = "yellow") works

[gaborcsardi]

Currently you need to change the fmt property in the theme of h1 to achieve this. Example:

cli/R/themes.R

Line 106 in b7f8259

fmt = function(x) cli::rule(x, line_col = "cyan")),