To cite package ‘katex’ in publications use:

  Ooms J (2024). _katex: Rendering Math to HTML, 'MathML', or
  R-Documentation Format_. R package version 1.4.1, ,
  <https://github.com/ropensci/katex>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {katex: Rendering Math to HTML, 'MathML', or R-Documentation Format},
    author = {Jeroen Ooms},
    year = {2024},
    note = {R package version 1.4.1, 
},
    url = {https://github.com/ropensci/katex},
  }