rmarkdown::output_format_dependency(): An Easier Way to Customize Output Formats for R Markdown

Traditionally there are two main ways to customize R Markdown output formats: one is to use the options of an existing output format, e.g., set toc: true for html_document; the other is to define a new output format function based on rmarkdown::output_format(), which usually requires you to develop an R package because that’s the best place to host the function.

The first way can be limited—you can only customize the things that are given to you. The second way …