Have you considered the --sections-divs option (https://pandoc.org/MANUAL.html#option--section-divs)?

For example, this markdown:

# A

## A1

## A2

# B

gives the following:

(1) pandoc section-divs.md

<h1 id="a">A</h1>
<h2 id="a1">A1</h2>
<h2 id="a2">A2</h2>
<h1 id="b">B</h1>

(2) pandoc section-divs.md --section-divs

<section id="a" class="level1">
<h1>A</h1>
<section id="a1" class="level2">
<h2>A1</h2>
</section>
<section id="a2" class="level2">
<h2>A2</h2>
</section>
</section>
<section id="b" class="level1">
<h1>B</h1>
</section>

(3) pandoc section-divs.md --section-divs --to=html4

<div id="a" class="section level1">
<h1>A</h1>
<div id="a1" class="section level2">
<h2>A1</h2>
</div>
<div id="a2" class="section level2">
<h2>A2</h2>
</div>
</div>
<div id="b" class="section level1">
<h1>B</h1>
</div>

On Thu, 25 May 2023 at 20:36, H <agents-FcZObrvlYduBUy7/sJONFg@public.gmane.org> wrote:
On May 25, 2023 6:42:49 AM EDT, Felix SOEDJEDE <soefelix@gmail.com> wrote:
>You could use Fenced divs:
>https://pandoc.org/MANUAL.html#divs-and-spans
>
>You can put inside headers, paragraphs, code blocks, etc.
>
>
>Le jeudi 25 mai 2023 à 01:20:09 UTC+2, H a écrit :
>
>> On 05/24/2023 04:51 PM, H wrote:
>> > Using pandoc 3.1.2 and am trying my hand at writing my first writer
>to
>> customize HTML output for a specific, predefined newsletter format.
>> >
>> > The source document is written in markdown, contains headers of
>various
>> levels, paragraphs of text, links to images and mail links. No lists,
>no
>> tables and no code blocks.
>> >
>> > The document is structured with an introductory section, multiple
>> identically formatted sections and then a final section at the end. I
>need
>> to wrap various portions of the structure with <div></div> at
>multiple
>> levels in order to achieve the desired formatting. Some of the
><div></div>
>> tags need to wrap H1, H2, image, multiple paragraphs, other
><div></div>
>> tags wrap only one such item. In addition, most HTML tag need to have
>some
>> predefined custom style information.
>> >
>> > This output will be manually added to a certain newsletter editor
>in a
>> CRM system and I cannot add any CSS information whatsoever,
>everything has
>> to be structured as outlined above.
>> >
>> > Since I am new to writing filters, I am looking for some
>suggestions how
>> approach the <div></div> wrapping when multiple different HTML items
>need
>> to be wrapped.
>> >
>> > Thank you.
>> >
>> I should add that one <div></div> pair may enclose H1, H2, image, and
>
>> several paragraphs until the next H1 tag or end of document. Another
>> <div></div> pair (within the just-mentioned pair) may enclose the
>image and
>> several paragraphs, again until the next H1 tag (or end of document).
>There
>> are some additional levels of <div> pairs but this describes the gist
>of it.
>>
>> Suggestions welcome!
>>
>>

I do not want to make any changes to the source markdown document, the appropriate processing needs to be done in my custom output HTML filter.

I am looking into the following (simplified) flow example:
- Add a <div> tag when encountering a H2 element.
- Add the corresponding </div> tag when encountering a H1 or H2 element or the end of the document.

--
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-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org.
To view this discussion on the web visit https://groups.google.com/d/msgid/pandoc-discuss/1F66BB1E-B5C8-4062-8202-D82C5CE9A3D0%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-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org.
To view this discussion on the web visit https://groups.google.com/d/msgid/pandoc-discuss/CAEe_xxgNr8O73TNGgV5y%3DgwiLAKB3WFuX5a49Vv_RJDtojVcSQ%40mail.gmail.com.