Too many good options!
I've decided to work with the Lua filters, since they are more efficient 
and Lua is built into Pandoc, for now.  And it is working pretty well for 
me so far.

On Saturday, December 11, 2021 at 5:23:35 PM UTC-5 sebastien....-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org 
wrote:

> Le samedi 11 décembre 2021 à 01:08:47 UTC+1, spotte...-Re5JQEeQqe8@public.gmane.orgm a écrit :
>
>> This might work better for me since I am much more familiar with Python 
>> than 
>> Lua. I didn't know there was a Pandoc library for Python! 
>
>
> There are actually 3 Pandoc librairies for Python (that I know of):
>
>   - pandocfilters: 
> https://pandoc.org/filters.html#but-i-dont-want-to-learn-haskell
>
>   - panflute: http://scorreia.com/software/panflute/
>
>   - pandoc (Python): https://boisgera.github.io/pandoc/
>
> Cheers,
>
> SB
>
>  
>
>> Thanks very much. 
>>
>> On Fri, 2021-12-10 at 07:39 -0800, Sébastien Boisgérault wrote: 
>> > 
>> > 
>> > Le jeudi 9 décembre 2021 à 03:52:34 UTC+1, spotte...@gmail.com a écrit 
>> : 
>> > > I'm work on creating a set of examples of HTML, JavaScript, and SVG 
>> code. 
>> > > Each comes from a single source file, from which I want to produce a 
>> > > web page showing 
>> > > (a) the result of rendering the HTML or SVG or executing the 
>> JavaScript; 
>> > > (b) the code itself, viewed as if in a text editor, and (ideally) 
>> with 
>> > > syntax highlighting. 
>> > > 
>> > > The best way I can think of doing this involves making two 
>> > > transformations of the source file, running pandoc on each of them, 
>> > > and the combining the outputs, probably by running pandoc a third 
>> time 
>> > > with a custom template. 
>> > > 
>> > > I'm wondering if there's any better way? 
>> > 
>> > IMHO, you only need one call to pandoc: if you're ok with Python and 
>> with the 
>> > pandoc python library (https://pypi.org/project/pandoc/), you could 
>> use the 
>> > following showcase.py script : 
>> > 
>> > # file: showcase.py 
>> > import sys 
>> > import pandoc 
>> > from pandoc.types import Pandoc, Meta, CodeBlock, RawBlock 
>> > 
>> > if __name__ == "__main__": 
>> > filename = sys.argv[1] 
>> > with open(filename) as html_file: 
>> > html = html_file.read() 
>> > html_block = RawBlock("html", html) 
>> > attr = ("", ["html"], []) 
>> > code_block = CodeBlock(attr, html) 
>> > doc = Pandoc(Meta({}), [html_block, code_block]) 
>> > with open("out.html", "bw") as output: 
>> > pandoc.write(doc, file=output, format="html", options=[" 
>> > --standalone"]) 
>> > 
>> > Then, if you call 
>> > 
>> > $ python -m showcase.py form.html 
>> > 
>> > where form.html is the HTML file 
>> > 
>> > <form> 
>> > <input id="b1" type="button" value="Apply" title="Button"/> 
>> > </form> 
>> > 
>> > you will end up with the desired output in the file "out.html". 
>> > 
>> > Cheers, 
>> > 
>> > SB 
>> > 
>> > > Here's a small example: 
>> > > 
>> > > (1) Original source file: 
>> > > 
>> > > <form> 
>> > > <input id="b1" type="button" value="Apply" title="Button"/> 
>> > > </form> 
>> > > 
>> > > 
>> > > (2) Intermediate file 1: 
>> > > 
>> > > ```{=html5} 
>> > > <form> 
>> > > <input id="b1" type="button" value="Apply" title="Button"/> 
>> > > </form> 
>> > > ``` 
>> > > 
>> > > (3) Intermediate file 2: 
>> > > 
>> > > ~~~~{.html} 
>> > > <form> 
>> > > <input id="b1" type="button" value="Apply" title="Button"/> 
>> > > </form> 
>> > > ~~~~ 
>> > > 
>> > > (4) Desired final output would be something like this: 
>> > > 
>> > > ... 
>> > > 
>> > > <h2>A Form with a Button</h2> 
>> > > 
>> > > <form> 
>> > > <input id="b1" type="button" value="Apply" title="Button"/> 
>> > > </form> 
>> > > 
>> > > <h2>Code to Produce a Form with a Button</h2> 
>> > > 
>> > > <div class="sourceCode" id="cb1"><pre class="sourceCode html"><code 
>> > > class="sourceCode html"><a class="sourceLine" id="cb1-1" 
>> title="1"><span 
>> > > class="kw">&lt;form&gt;</span></a> 
>> > > <a class="sourceLine" id="cb1-2" title="2"><span 
>> > > class="kw">&lt;input</span><span class="ot"> id=</span><span 
>> > > class="st">&quot;b1&quot;</span><span class="ot"> type=</span><span 
>> > > class="st">&quot;button&quot;</span><span class="ot"> 
>> value=</span><span 
>> > > class="st">&quot;Apply&quot;</span><span class="ot"> 
>> title=</span><span 
>> > > class="st">&quot;Button&quot;</span><span class="kw">/&gt;</span></a> 
>> > > <a class="sourceLine" id="cb1-3" title="3"><span 
>> > > class="kw">&lt;/form&gt;</span></a></code></pre></div> 
>> > > 
>> > > ... 
>> > > 
>> > 
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>>
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