As far as I know, you can't add 'style' attributes. But you can embed CSS
via header-includes. You'll find an example of this if you search the
manual for 'header-includes' (and you can use a filter to set the variable;
I think Albert gave an example of how to do this a few weeks ago).

On Tue, 13 Jun 2023, 21:37 H, <agents-FcZObrvlYduBUy7/sJONFg@public.gmane.org> wrote:

> Continuing my quest to write a custom filter, I now ran into a need to add
> attributes to different types of tags as exemplified below:
>
> - In header tags such as <h2>, I need to add "style=color: #112233;" so it
> becomes <h2 style="color: #112233;">.
>
> - I analogously also need to add style information to <image> tags.
>
> In my filter I tried:
>
> style_h2 =
>
> if (el.level == 2) then
>     local attr = el.attributes
>     attr.insert = style_h2
> end
>
> but ended up with the below in my html output:
>
> <h2
> data-insert=" style=&quot;text-transform: uppercase; color:
> #cc002b;&quot;">
>
> Clearly not the correct way. Can I add the style information as above in a
> filter, in the pandoc function as I am going through my document
> block-by-block and modifying the document structure as needed? I already
> adding <div> with various style information as I iterate over the blocks
> and that works fine but now I need to modify existing tags.
>
> I guess I could do it similarly to below but then it applies to all eg H2:
>
> function Header(el)
>     --    remove header identifier for all levels
>     el.identifier = ''
>
>     --    convert level 1 and 2 to upper case
>     if (el.level == 1) or (el.level == 2) then
>         return el:walk {
>             Str = function(el)
>                 return pandoc.Str(text.upper(el.text))
>             end
>         }
>     else
>         return el
>     end
> end
>
> How to do it on individual H2 in a filter?
>
> Thanks.
>
> --
> You received this message because you are subscribed to the Google Groups
> "pandoc-discuss" group.
> To unsubscribe from this group and stop receiving emails from it, send an
> email to pandoc-discuss+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org
> To view this discussion on the web visit
> https://groups.google.com/d/msgid/pandoc-discuss/76a72c07-6699-d243-ae20-64808682ec9e%40meddatainc.com
> .
>

-- 
You received this message because you are subscribed to the Google Groups "pandoc-discuss" group.
To unsubscribe from this group and stop receiving emails from it, send an email to pandoc-discuss+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org
To view this discussion on the web visit https://groups.google.com/d/msgid/pandoc-discuss/CAEe_xxgeoT3UjKy0vK2b_w87d-ovNgpL_gRdyDeyb6%2B4SztxQA%40mail.gmail.com.