revealjs output is broken

[mrpg]

pandoc 2.9.2.1 on Arch Linux

git clone https://github.com/hakimel/reveal.js.git
wget https://pandoc.org/demo/SLIDES
pandoc -s --mathjax -i -t revealjs SLIDES -o example16d.html

produces output with the following error messages in Web Developer:

SyntaxError: import declarations may only appear at top level of a module (reveal.js:1)
ReferenceError: Reveal is not defined (example16d.html:75:7)

The example16d.html file itself looks like plain old HTML, with no CSS or JavaScript to speak of. I attach the entire folder to this issue.

I expected to get this.

pandoc-revealjs.tar.gz

[jgm]

The new version of reveal.js changes some paths and breaks pandoc's output. We've made changes in the dev version to work with the latest reveal.js, so try a nightly and see if your issue is fixed already in the master branch.

[ale66]

Hello John thanks a lot for your work on Pandoc, we all owe to you!
I too report reveal not working anymore:

pandoc -t revealjs -s -o myslides.html myslides.md -V revealjs-url=https://revealjs.com

creates an output file myslides.html that is not interpreted at runtime.

[hakimel]

Hey all 👋 The website at https://revealjs.com was recently updated to reveal.js 4.0 so all of the assets were moved. If you swap out https://revealjs.com for https://unpkg.com/[email protected]/ your exports should work again.

pandoc -t revealjs -s -o s.html s.md -V revealjs-url=https://unpkg.com/[email protected]/

[hakimel]

@jgm If you're adding support for reveal.js 4.0 in an upcoming pandoc version, it would be more future-proof to point to a versioned copy of reveal.js on unpkg. For example https://unpkg.com/reveal.js@^4/ should avoid any breaking changes.

[mrpg]

Hey @jgm and @hakimel, thanks a lot. While I can't currently check out the development version of Pandoc due to conflicting or unavailable dependencies on my machine, what @hakimel wrote fixes my issues for now. Again, thanks a million for all you do!

[jgm]

@hakimel thanks for the suggestion. I think I'll change that in the defaults.