Dear all,

My question is a rewrite of a previous question of mine (https://groups.google.com/g/pandoc-discuss/c/wg3UIgI7G8I/m/V8GoGf9ACwAJ), with less convoluted explanation.

For conversion from markdown to beamer, is there a(n easy...) way to define a lua filter that applies to headers that will become beamer blocks?

The goal is to be able for instance to add classes and attributes to the header becoming beamer blocks to control the display. A few examples include things like "width = XX%", or ".centered" for the inside text to be centered, etc. Of course, there are other ways to achieve such results, but the source file become kind of ugly.