To cite package ‘shinyfocus’ in publications use:

  Harmon J (2023). _shinyfocus: Use Browser Focus Events in 'shiny'_. R
  package version 0.0.0.9000,
  <https://github.com/shinyworks/shinyfocus>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {shinyfocus: Use Browser Focus Events in 'shiny'},
    author = {Jon Harmon},
    year = {2023},
    note = {R package version 0.0.0.9000},
    url = {https://github.com/shinyworks/shinyfocus},
  }