This filter overwrites the code block HTML for revealjs output to enable the code presenting features of reveal.js. A custom template is required to include highlight.js (which comes with reveal.js as a plugin).

The filter passes the code block attributes to reveal.js. This enables the following reveal.js features:

• Line Numbers & Highlights and Step-by-step Highlights via the data-line-numbers attribute. (.numerLines and .number-lines classes are converted for compatibility.)
• Auto-Animation of code blocks with line numbers and a data-id. (The slide headings need the data-auto-animate attribute.)

You have to include highlight.js in your own custom template or use the provided template.html. It has two additional variables:

• highlightjs to opt in highlight.js (default to false)
• highlightjs-theme to select a theme. Currently reveal.js comes with monokai (default) and zenburn.

$ pandoc sample.md -o sample.html -t revealjs -L revealjs-codeblock.lua \
  --template template.html -V highlightjs -V highlightjs-theme:zenburn

See sample.md for a recreation of the code presentation demo.