markdown 1.5

• Values of meta variables title, author, and date (if provided) will be transformed to the target output format before they are passed into templates.

• Fixed the bug that the default CSS was not added to HTML output.

• Removed dependency on the mime package.

• Added experimental support for HTML slides: markdown::mark_html(..., meta = list(css = c('default', 'slides'), js = 'slides')). If you prefer knitting Rmd documents in RStudio, you may use the output format:

  output:
    markdown::html_format:
      meta:
        css: [default, slides]
        js: [slides]

  See https://yihui.org/en/2023/01/minimal-r-markdown/ for a demo.