Thanks!
Could you please update this test source-highlightjs-languages:source-highlightjs-languages (see CI logs)

Forced push the changes. Tests are passing on my machine 😀

Do you want a sample of it in action ?

Forced push the changes. Tests are passing on my machine

And it also works on the CI 😉

Do you want a sample of it in action ?

Yes, that would be great! Please add an example in https://github.com/asciidoctor/asciidoctor-reveal.js/blob/master/examples/release-5.2.adoc (it will be published by Netlify: https://deploy-preview-533--asciidoctor-revealjs-examples.netlify.app/release-5.2)

Done !

That's very cool! 👍🏻
https://deploy-preview-533--asciidoctor-revealjs-examples.netlify.app/release-5.2#/_synchronising_step_by_step_syntax_highlighting

Hi, thanks a lot for the update.

I wanted to make the listing appearing immediately in the slide, together with the first fragment, do you know how to make that work?
Could it be related to this fragmentIndex += 1;? It seems that even if I set step=0 the listing is not showing.

Not sure exactly what you want to achieve.

You want the code to be displayed as soon as the slide is focused with the first callout, is this correct ?

Yes, basically I'd like that as soon as you move onto the slide, the code snippet that is within that slide is visible, with the focus on the highlighted line at the first step.
For instance, I have the following

[source,,linenums,highlight="2|3-6|2|3-6|2|3-6|13", step=0]
----
<some code>
----

And I'd like that as soon as I jump to that slide, the code snippet is shown, and line 2 is highlighted.

I managed to make a workaround, but it is not ideal as I had to duplicate the code and it doesn't highlight the line 2 straight away.

# overlay the two code blocks
[.r-stack] 
--

[source,,linenums,highlight="2|3-6|2|3-6|2|3-6|13", step=0]
----
<some code>
----

[source.fade-out,,linenums,step=0]
----
<some code>
----

--