I think this almost does the trick, but the colon is appearing at the end 
of the heading:

1 FirstHeading.

whereas I wanted it just after the number 1.

Is there a way to change it ?

On Tuesday, 27 April 2021 at 16:27:18 UTC+10 Albert Krewinkel wrote:

>
> Tim <tim.a...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> writes:
>
> > I am converting markdown to html using pandoc with an associated simple 
> CSS.
> >
> > Currently, the numbered headings appear as:
> >
> > 1 FirstHeading
> > 1.1..
> >
> > 2 SecondHeading
> >
> > My aim: I would like to modify the format of the headings very slightly 
> so
> > that there is a period after even the H1 headings:
> > 1. FirstHeading.
> >
> > I am *guessing* from looking at the html output that pandoc hardcodes the
> > html output for the numbered sections. Am I right therefore in thinking
> > that I cannot modify my CSS to achieve my aim.
> >
> > What then is the easiest way to achieve my aim?
>
> If this is just for HTML, then you could use CSS to add the period.
>
> Putting the following anywhere in your input Markdown should do the
> trick:
>
> ```{=html}
> <style>
> h1::after, h2::after, h3::after, h4::after, h5::after, h6::after {
> content: '.';
> }
> </style>
> ```
>
> If you also need to target different output, then I'd suggest using a
> pandoc Lua filter. Put the following in a file `heading-periods.lua`
> and run with `pandoc --lua-filter heading-periods.lua`
>
> ``` lua
> function Header (h)
> h.content = h.content:insert(pandoc.Str '.')
> return h
> end
> ```
>
> HTH,
> Albert
>
>
> --
> Albert Krewinkel
> GPG: 8eed e3e2 e8c5 6f18 81fe e836 388d c0b2 1f63 1124
>

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